MedWorm.com provides a medical RSS filtering service. Over 6000 RSS medical sources are combined and output via different filters. This feed contains the latest items from the 'BioMedical Engineering OnLine' source. Sun, 21 Mar 2010 17:31:37 +0100 http://www.medworm.com/index.php?rid=3350118&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F9%2F1%2F16 Conclusions: This paper presented a novel approach based on Kalman filtering for motion artifact removal in NIR recordings. The proposed approach provides a suitable solution to the motion artifact removal problem in NIR studies by combining the advantages of the existing adaptive and Wiener filtering methods in one algorithm which allows efficient real time application with no requirement on additional sensor measurements. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=3350118 Tue, 09 Mar 2010 00:00:00 +0100 3350118 http://www.medworm.com/index.php?rid=3346333&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F9%2F1%2F15 Coronary artery disease can be treated by implanting a stent into the blocked region of an artery, thus enabling blood perfusion to distal vessels. Minimally invasive procedures of this nature often result in damage to the arterial tissue culminating in the re-blocking of the vessel. In an effort to alleviate this phenomenon, known as restenosis, drug eluting stents were developed. They are similar in composition to a bare metal stent but encompass a coating with therapeutic agents designed to reduce the overly aggressive healing response that contributes to restenosis. There are many variables that can influence the effectiveness of these therapeutic drugs being transported from the stent coating to and within the artery wall, many of which have been analysed and documented by researchers... BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=3346333 Tue, 09 Mar 2010 00:00:00 +0100 3346333 http://www.medworm.com/index.php?rid=3311448&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F9%2F1%2F13 Conclusions: In this work we introduce a new methodology for evaluation of tissue ablation by IRE using statistical models of cell death. We believe that the use of a statistical model rather than a deterministic model for IRE cell death will improve the accuracy of treatment planning for cancer treatment with IRE. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=3311448 Fri, 26 Feb 2010 00:00:00 +0100 3311448 http://www.medworm.com/index.php?rid=3306563&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F9%2F1%2F11 Conclusions: The proposed classifier may enable investigators to form more accurate interpretations of electrodermal activity as a measure of an individual's psychophysiological state. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=3306563 Thu, 25 Feb 2010 00:00:00 +0100 3306563 http://www.medworm.com/index.php?rid=3306562&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F9%2F1%2F12 Conclusions: Our study indicated that the backscattering NIR light guided by fiber-optical probe makes it a potential alternative for continuous observation of intrinsic optical properties of cell culture under varied physical or chemical challenges. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=3306562 Thu, 25 Feb 2010 00:00:00 +0100 3306562 http://www.medworm.com/index.php?rid=3283411&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F9%2F1%2F9 Conclusion: This study indicates that the use of nanofibers influence expression of genes associated with the extra cellular matrix formation. The composition of the nanofibers plays a critical role. While PLLA/Col-I blend nanofibers enhance the collagen I and III formation, their expression on PLLA nanofibers was more comparable to controls. However, irrespective of the chemical composition of the fibres, the collagen deposition was altered, an effect which might be associated with a decreased expression of biglycanes. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=3283411 Wed, 17 Feb 2010 00:00:00 +0100 3283411 http://www.medworm.com/index.php?rid=3266776&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F9%2F1%2F8 A semi-automated, non-rigid breast surface registration method is presented that involves solving the Laplace or diffusion equations over undeformed and deformed breast surfaces. The resulting potential energy fields and isocontours are used to establish surface correspondence. This novel surface-based method, which does not require intensity images, anatomical landmarks, or fiducials, is compared to a gold standard of thin-plate spline (TPS) interpolation. Realistic finite element simulations of breast compression and further testing against a tissue-mimicking phantom demonstrate that this method is capable of registering surfaces experiencing 6 - 36 mm compression to within a mean error of 0.5 - 5.7 mm. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=3266776 Fri, 12 Feb 2010 00:00:00 +0100 3266776 http://www.medworm.com/index.php?rid=3239319&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F9%2F1%2F7 Conclusions: We conclude that stimulus type does affect specific characteristics of dual-axis swallowing accelerometry signals, suggesting that associated clinical screening protocols may need to be stimulus specific. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=3239319 Thu, 04 Feb 2010 00:00:00 +0100 3239319 http://www.medworm.com/index.php?rid=3193587&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F9%2F1%2F6 Conclusions: Although, the optimal detective position has to be close to the middle of the radial arterial, the pressure waveform also has a good completeness with a template correlation coefficient of above 0.99 when the position was within +/-1 mm of the middle of the radial arterial range. In applying force, using the maximum amplitude as the criteria level, the lower contact pressure was better than the higher contact pressure. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=3193587 Thu, 21 Jan 2010 00:00:00 +0100 3193587 http://www.medworm.com/index.php?rid=3175679&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F9%2F1%2F5 Conclusions: The proposed method allows the automatic construction of the area variation curve of the left ventricle corresponding to a complete cardiac cycle. This may potentially be used for the identification of several clinical parameters, including the area variation fraction. This parameter could potentially be used for evaluating the global systolic function of the left ventricle. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=3175679 Fri, 15 Jan 2010 00:00:00 +0100 3175679 http://www.medworm.com/index.php?rid=3163614&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F9%2F1%2F4 Conclusions: Physiological experiments suggest that long-term blood pressure is regulated by the nervous system. The NTS functions as a comparator (evaluating the error signal) between its RNS and the cardiovascular receptor afferents and projects to nuclei that regulate the circulatory variables. The mean arterial pressure (MAP) is regulated by the feedback of chemo and cardiopulmonary receptors and the baroreflex would stabilize the short term pressure value to the prevailing carotid MAP. The discharge rates of rostral neural projections to the NTS would function as the set point of the closed and open loops of cardiovascular control. No doubt, then, the RNS play a functional role not only under steady-state conditions, but also in different behaviors and pathologies. (Source: BioMedical... BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=3163614 Mon, 11 Jan 2010 00:00:00 +0100 3163614 http://www.medworm.com/index.php?rid=3148920&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F9%2F1%2F3 Conclusions: We established an interpretive age-adjusted multivariate model for IR imaging of the breast. The cut-off values and the corresponding sensitivity and specificity can be inferred from the model in a subpopulation for diagnostic purpose.Trial Registration: NCT00166998. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=3148920 Thu, 07 Jan 2010 00:00:00 +0100 3148920 http://www.medworm.com/index.php?rid=3148921&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F9%2F1%2F2 Conclusions: The localized coherent line removal algorithm reduces CPR-artefacts in VF-ECG, but does not eliminate them. It uses the ECG-channel only, without any additional information (like blood pressure). Our SNR-improvements are in the same range as offered by multichannel methods of Rheinberger et al., Husoy et al. and Aase et al. Additional developments are necessary before the algorithm can be tested in real CPR situations. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=3148921 Wed, 06 Jan 2010 00:00:00 +0100 3148921 http://www.medworm.com/index.php?rid=3145771&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F9%2F1%2F1 Leslie Alexander Geddes took off on a long, long trip, Sunday October 25, 2009, leaving his body for medical and research use. The departing station was West Lafayette, Indiana, where he set foot in 1974, at Purdue University, stamping there a unique deep imprint, similar and probably more profound than the one left at Baylor College of Medicine (BCM), Houston, Texas, in the period 1955-1974. Memories came back as a flood the minute after a message broke the news to me: When I first met him visiting the Department of Physiology at BCM back in 1962, my first Classical Physiology with Modern Instrumentation Summer Course ... The versatile Physiograph was the main equipment, an electronic-mechanical three or four channel recorder that could pick up a variety of physiological variables. Les an... BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=3145771 Tue, 05 Jan 2010 00:00:00 +0100 3145771 http://www.medworm.com/index.php?rid=3133444&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F8%2F1%2F42 Conclusions: Though non-physiological conditions were used in this initial study, the utility of MRI in the development of a thermally-activated SMP foam device has been demonstrated. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=3133444 Thu, 31 Dec 2009 00:00:00 +0100 3133444 http://www.medworm.com/index.php?rid=3092526&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F8%2F1%2F40 Conclusions: Obtaining ECAP recordings is also possible in the most apical region of the cochlea. However, differences can be observed depending on the region of the cochlea stimulated. Specifically, significant higher ECAP amplitude, lower thresholds and steeper amplitude growth function slopes have been observed in the apical region. These differences could be explained by the location of the stimulating electrode with respect to the neural tissue in the cochlea, a higher density, or an increased neural survival rate of neural tissue in the apex.Trial registrationThe Clinical Investigation has the Competent Authority registration number DE/CA126/AP4/3332/18/05. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=3092526 Wed, 16 Dec 2009 00:00:00 +0100 3092526 http://www.medworm.com/index.php?rid=3092525&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F8%2F1%2F41 Conclusions: Because the strength of the muscles in the fingers is limited, the muscles will not be able to overcome joint resistance if joint stiffness is increased to its limit due to OA. This may contribute to the reduced range of motion typically seen in OA. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=3092525 Wed, 16 Dec 2009 00:00:00 +0100 3092525 http://www.medworm.com/index.php?rid=3133445&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com Conclusions: Potentially hazardous situations are possible during an MR scan due to gradient fields. Unintended stimulation can be induced via abandoned leads and leads connected to a pulse generator with loss of hermetic seal at the connector. Pacemaker-dependent patients can receive drastically altered pacing pulses. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=3133445 Tue, 15 Dec 2009 00:00:00 +0100 3133445 http://www.medworm.com/index.php?rid=3089096&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F8%2F1%2F39 Conclusions: Potentially hazardous situations are possible during an MR scan due to gradient fields. Unintended stimulation can be induced via abandoned leads and leads connected to a pulse generator with loss of hermetic seal at the connector. Pacemaker-dependent patients can receive drastically altered pacing pulses. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=3089096 Tue, 15 Dec 2009 00:00:00 +0100 3089096 http://www.medworm.com/index.php?rid=3079108&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F8%2F1%2F38 Conclusions: Because pulse beats of ventricles are less likely to be influenced by baseline wandering and noise,we used the inter-beat intervals to diagnose AFib. We visually displayed regularity of the inter-beat intervals byway of Poincare plot. We tried to design an automated algorithm which did not require any human interventionand any specific threshold, and could be installed in a portable AFib monitoring system. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=3079108 Fri, 11 Dec 2009 00:00:00 +0100 3079108 http://www.medworm.com/index.php?rid=3018797&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F8%2F1%2F36 Conclusion: In conclusion, it could be demonstrated that the developed MBS-model is suitable for simulating ground reaction forces of dogs during walking. In forthcoming investigations the model will be developed further for the calculation of forces and moments acting on the hip joint during different movements, which can be of help in context with the in silico development and testing of hip prostheses. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=3018797 Mon, 23 Nov 2009 00:00:00 +0100 3018797 http://www.medworm.com/index.php?rid=3003619&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F8%2F1%2F35 Conclusions: These results show that the analysis of features computed from the displacement of the COP are of great importance in studies trying to understand the ageing process. In particular, the LDA-value showed to be an adequate feature for assessment of changes in the postural control which can be related to functional changes that occur over the ageing. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=3003619 Wed, 18 Nov 2009 00:00:00 +0100 3003619 http://www.medworm.com/index.php?rid=3003620&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F8%2F1%2F34 Conclusion: These results show that co-culturing of EC and MSC for 5 days influences osteogenic differentiation of MSC, an effect that might be independent of Runx2, and enhances the production of ALP by MSC. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=3003620 Tue, 17 Nov 2009 00:00:00 +0100 3003620 http://www.medworm.com/index.php?rid=2962950&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F8%2F1%2F32 Conclusions: These results demonstrate that enzymatic digestion alters cartilage viscoelastic properties in a manner consistent with polymer dynamics mechanisms. Future studies may expand the use of polymer dynamics as a microstructural model for understanding the contributions of specific matrix molecules toward tissue-level viscoelastic properties. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=2962950 Wed, 04 Nov 2009 00:00:00 +0100 2962950 http://www.medworm.com/index.php?rid=2939100&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F8%2F1%2F30 The response of the vascular endothelium to wall shear stress plays a central role in the development and progression of atherosclerosis. Current studies have investigated endothelial response using idealized in vitro flow chambers. Such cell culture models are unable to accurately replicate the complex in vivo wall shear stress patterns arising from anatomical geometries. To better understand this implication, we have created both simplified/tubular and anatomically realistic in vitro endothelial flow models of the human right coronary artery. A post-mortem vascular cast of the human left ventricular outflow tract was used to create geometrically accurate silicone elastomer models. Straight, tubular models were created using a custom made mold. Following the culture of human abdominal aor... BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=2939100 Wed, 28 Oct 2009 00:00:00 +0100 2939100 http://www.medworm.com/index.php?rid=2939099&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F8%2F1%2F31 Conclusions: The proposed algorithm shows effective accuracy performance with a short learning time. In addition we ascertained the robustness of the proposed algorithm by evaluating the entire MIT-BIH arrhythmia database. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=2939099 Wed, 28 Oct 2009 00:00:00 +0100 2939099 http://www.medworm.com/index.php?rid=2934535&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F8%2F1%2F29 A recently developed machine learning algorithm referred to as Extreme Learning Machine (ELM) was used to classify machine control commands out of time series of spike trains of ensembles of CA1 hippocampus neurons (n = 34) of a rat, which was performing a target-to-goal task on a two-dimensional space through a brain-machine interface system. Performance of ELM was analyzed in terms of training time and classification accuracy. The results showed that some processes such as class code prefix, redundancy code suffix and smoothing effect of the classifiers' outputs could improve the accuracy of classification of robot control commands for a brain-machine interface system. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=2934535 Wed, 28 Oct 2009 00:00:00 +0100 2934535 http://www.medworm.com/index.php?rid=2927128&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F8%2F1%2F28 Conclusions: The photoplethysmographic-based technique for automatic measurement of systolic blood pressure, and the algorithm which was presented in this study, seem to be accurate. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=2927128 Mon, 26 Oct 2009 00:00:00 +0100 2927128 http://www.medworm.com/index.php?rid=2919995&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F8%2F1%2F27 Conclusions: The key findings of this study are as follows. (1) The minimum required joint moment for an STS task is essentially equivalent to the static component of the joint moment. (2) For fast and moderate speed movements (less than 2.5 seconds), joint moments increased exponentially as the movement speed increased. (3) For slow movements greater than 2.5 seconds, the joint moments were relatively constant. The results of this STS research has practical applications, especially in rehabilitations and exercise prescription where improved movement time is an intended target, since the required muscle strength can be quantitatively estimated. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=2919995 Wed, 21 Oct 2009 23:00:00 +0100 2919995 http://www.medworm.com/index.php?rid=2865479&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F8%2F1%2F24 Conclusions: In a patient-specific case peak aneurysm wall stress was reduced by 92%. Such a reduction in aneurysm wall stress may lead to shrinkage of the aneurysm over time. Hence, post-operative stress patterns may help in determining the likelihood of aneurysm shrinkage post EVAR. Post-operative remodelling of the aneurysm may lead to increased drag forces. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=2865479 Mon, 05 Oct 2009 23:00:00 +0100 2865479 http://www.medworm.com/index.php?rid=2823829&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F8%2F1%2F20 Conclusions: This paper analytically clarified the effects of dielectric permittivities on the thermally steady state temperature elevation and the temperature difference in the skin of a one-dimensional three-layer model due to MMW exposure. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=2823829 Tue, 22 Sep 2009 23:00:00 +0100 2823829 http://www.medworm.com/index.php?rid=2819816&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F8%2F1%2F19 Conclusion: Contrary to previous assertions, no repeatable dielectric non-linearity was exhibited in the bulk suspensions tested under the field and frequency condition reported with this recently designed analyzer. Indeed, interface related harmonics were observed and monitored during biochemical stimuli. The changes were coherent with the expected biological response. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=2819816 Mon, 21 Sep 2009 23:00:00 +0100 2819816 http://www.medworm.com/index.php?rid=2695260&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F8%2F1%2F17 Conclusions: Hence, CCM can be used as an additional Poincare plot descriptor to detect pathology. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=2695260 Wed, 12 Aug 2009 23:00:00 +0100 2695260 http://www.medworm.com/index.php?rid=2674158&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F8%2F1%2F16 Background: Facial expressions are important in facilitating human communication and interactions. They are also used as an important tool in behavioral studies and medical rehabilitation. Facial image based mood detection techniques may provide a fast and practical approach for non-invasive mood detection. The purpose of the present study was to develop an intelligent system for facial image based expression classification using committee neural networks. Methods: Several facial parameters were extracted from facial image and used to train several generalized and specialized neural networks. Based on initial testing, the best performing generalized and specialized neural networks were recruited into decision making committees forming an integrated committee neural network system. The inte... BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=2674158 Tue, 04 Aug 2009 23:00:00 +0100 2674158 http://www.medworm.com/index.php?rid=2663841&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F8%2F1%2F15 Background: It is believed that mechanical stresses play an important role in atherosclerotic plaque rupture process and may be used for better plaque vulnerability assessment and rupture risk predictions. Image-based plaque models have been introduced in recent years to perform mechanical stress analysis and identify critical stress indicators which may be linked to rupture risk. However, large-scale studies based on in vivo patient data combining mechanical stress analysis, plaque morphology and composition for carotid plaque vulnerability assessment are lacking in the current literature. Methods: 206 slices of in vivo magnetic resonance image (MRI) of carotid atherosclerotic plaques from 20 patients (age: 49-71, mean: 67.4; all male) were acquired for model construction. Modified Moone... BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=2663841 Sun, 02 Aug 2009 23:00:00 +0100 2663841 http://www.medworm.com/index.php?rid=2637671&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F8%2F1%2F14 Book detailsForbes J. BurkowskiStructural Bioinformatics: An Algorithmic ApproachChapman & Hall/CRC Mathematical & Computational Biology, 2008:406 pages. ISBN: 1584886838 (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=2637671 Thu, 23 Jul 2009 23:00:00 +0100 2637671 http://www.medworm.com/index.php?rid=2584001&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F8%2F1%2F13 Conclusions: The KF/SQI-fusion method described in this article was shown to provide an accurate estimate of blood pressure and HR derived from the ABP waveform even in the presence of high levels of persistent noise and artifact, and during extreme bradycardia and tachycardia. Differences in error between artifact types, measurement sensors and the quality of the source signal can be factored into physiological estimation using an unbiased adaptive filter, signal innovation and signal quality measures. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=2584001 Tue, 07 Jul 2009 23:00:00 +0100 2584001 http://www.medworm.com/index.php?rid=2552823&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F8%2F1%2F12 The purpose of the current study was to investigate the effects of aging on tendon response to repetitive exposures of stretch-shortening cycles (SSC's). Methods: The left hind limb from young (3 mo, N=4) and old (30 mo, N=9) male Fisher 344 x Brown Norway rats were exposed to 80 maximal SSCs (60 deg/s, 50 deg range of motion) 3x/week for 4.5 weeks in vivo. After the last exposure, tendons from the tibialis anterior muscle were isolated, stored at -80degreesC, and then tested using a micro-mechanical testing machine. Deformation of each tendon was evaluated using both relative grip-to-grip displacements and reference marks via a video system. Results: At failure, the young control tendons had higher strain magnitude than the young exposed (p (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=2552823 Sun, 28 Jun 2009 23:00:00 +0100 2552823 http://www.medworm.com/index.php?rid=2508550&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F8%2F1%2F11 Conclusion: This mathematical model can be used to predict aneurysm growth rate, and the results are consistent with other clinical studies. Predictions from both hypothetical and clinical cases agree very well. This model explains why some aneurysms may grow into a stable size and remain so without rupture. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=2508550 Wed, 17 Jun 2009 23:00:00 +0100 2508550 http://www.medworm.com/index.php?rid=2508551&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F8%2F1%2F10 Conclusion: Measuring cervical resistivity with both the 3 and 12 mm probes is highly repeatable by a single observer. The reproducibility of this measurement is poor with the 3 mm probe but moderately good with the 12 mm when the latter is applied with firm pressure to the cervix and in the frequency range 9.8 to 156 kHz, consistent with our data from clinical trials. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=2508551 Tue, 16 Jun 2009 23:00:00 +0100 2508551 http://www.medworm.com/index.php?rid=2387856&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F8%2F1%2F9 Conclusions: The proposed segmentation/MI network method appears to be a promising approach for analyzing the EEG recorded during dynamic behaviors. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=2387856 Mon, 04 May 2009 04:00:00 +0100 2387856 http://www.medworm.com/index.php?rid=2380599&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F8%2F1%2F8 Conclusions: The strut shape found in the latest generation of stents are commonly dictated by manufacturing limitations. This research shows, however, that strut design can play a fundamental role in the improvement of the hemodynamic performance of stents. Present results show that up to 96\% of the area between struts is exposed to wall shear stress levels above the critical value for the onset of restenosis when a tear-drop strut profile is used, while the analogous value for a square profile is 19.4\%. The conclusions drawn from the non-dimensional metrics introduced in this work show good agreement with an ordinary analysis of the wall shear stress distribution based on the overall area exposed to critically low wall shear stress levels. The proposed metrics are able to predict, as e... BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=2380599 Thu, 30 Apr 2009 04:00:00 +0100 2380599 http://www.medworm.com/index.php?rid=2330331&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F8%2F1%2F7 Conclusion: These numerical investigations prove that a static load situation is insufficient for representing the whole gait cycle. This causes severe deviations in the FE calculation of the bone remodelling. However, accompanying clinical examinations are necessary to calibrate the bone growth law and thus to validate the FE calculations. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=2330331 Thu, 16 Apr 2009 04:00:00 +0100 2330331 http://www.medworm.com/index.php?rid=2275176&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F8%2F1%2F6 Conclusion: A new RF-assisted device for bloodless, rapid liver resection was designed, built and tested. The results demonstrate the potential advantages of this device over others currently employed. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=2275176 Wed, 18 Mar 2009 04:00:00 +0100 2275176 http://www.medworm.com/index.php?rid=2239765&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F8%2F1%2F5 Conclusion: The fault robustness and safety characteristics of a myoelectric controlled manipulator system were substantially improved. The proposed scheme prevents potential risks for the operator, the equipment and the environment. Both algorithms showed efficient behavior. This outline could be applied to myoelectric control of prosthesis, or assistive manipulators to better assure the system functionality when electrode faults or noisy environment are present. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=2239765 Wed, 25 Feb 2009 05:00:00 +0100 2239765 http://www.medworm.com/index.php?rid=2221994&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F8%2F1%2F5 Conclusions: The fault robustness and safety characteristics of a myoelectric controlled manipulator system were substantially improved. The scheme proposed prevents potential risks for the operator, the equipment and the environment. Both algorithms showed efficient behaviour. This outline could be applied to myoelectric control of prosthesis, or assistive manipulators in order to assure the functionality under electrode faults and noisy environments. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=2221994 Wed, 25 Feb 2009 05:00:00 +0100 2221994 http://www.medworm.com/index.php?rid=2120893&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F8%2F1%2F2 Conclusion: Although significant hysteresis was displayed in the measured SEMG signals, the committees of neural networks were able to predict the finger joint angle from SEMG signals. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=2120893 Tue, 20 Jan 2009 05:00:00 +0100 2120893 http://www.medworm.com/index.php?rid=2120894&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F8%2F1%2F1 Medical image analysis is increasingly providing a sophisticated set of tools for processing measurement inputs into clinically relevant outputs, although this is, on the whole, completed without consideration of the underlying physiology. In contrast, physiological modelling provides a predictive tool based on a physical and biological understanding of the underlying processes. In this editorial, we discuss the possibility of integrating physiological modelling data with medical images and measurements with the goal of providing new types of physiologically meaningful information with increased clinical relevance. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=2120894 Mon, 12 Jan 2009 05:00:00 +0100 2120894 http://www.medworm.com/index.php?rid=1974522&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F7%2F1%2F29 Background: Electrocardiogram recordings are very often contaminated by high-frequency noise usually power-line interference and EMG disturbances (tremor). Specific method for interference cancellation without affecting the proper ECG components, called subtraction procedure, was developed some two decades ago. Filtering out the tremor remains a priori partially successful since it has a relatively wide spectrum, which overlaps the useful ECG frequency band.MethodThe proposed method for tremor suppression implements the following three procedures. Contaminated ECG signals are subjected to moving averaging (comb filter with linear phase characteristic) with first zero set at 50 Hz to suppress tremor and PL interference simultaneously. The reduced peaks of QRS complexes and other relatively ... BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=1974522 Wed, 19 Nov 2008 05:00:00 +0100 1974522 http://www.medworm.com/index.php?rid=1738725&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F7%2F1%2F24 Conclusions: The wide range of CDPe is not affected that much by the presence of guidewire. CDPe can be used in clinical practice to evaluate the true severity of coronary stenosis due to its significant difference between values measured at moderate and severe stenoses. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=1738725 Wed, 27 Aug 2008 04:00:00 +0100 1738725 http://www.medworm.com/index.php?rid=1465373&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F7%2F1%2F17 Iran has recently made a significant progress in the field of biomedical science and launched an appreciable number of new high-tech biomedical research projects. Review of Iran's experience in advancing its biomedical research and the pitfalls the country encountered during the years of its progress could be of interest to other countries with similar technological conditions. As needs assessment and human resources have pivotal roles in any research infrastructure, here, we have delineated these factors and explored ways by which optimum advantage could be gained from them. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=1465373 Fri, 23 May 2008 04:00:00 +0100 1465373 http://www.medworm.com/index.php?rid=1453913&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F7%2F1%2F15 Conclusion: Utilizing a combination of the forward LV model and its time reversal improves the performance of motion estimation in evaluating the cardiac function. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=1453913 Mon, 19 May 2008 04:00:00 +0100 1453913 http://www.medworm.com/index.php?rid=1453912&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F7%2F1%2F16 Conclusions: A new amphiphilic bone bonding agent was developed, which builds an optimizied interlayer between the hydrophilic bone surface and the hydrophobic PMMA bone cement and thus leads to adhesive bonding between them. Our in vitro investigations demonstrated the adhesive bonding of PMMA bone cement to cortical bone, which was also stable against hydrolysis. The newly developed adhesive fixing technique could be applied clinically when the fixation of osteosynthesis plates with screws is impossible. With the detected adhesion forces of ca. 6 to 8 MPa, it is assumed that the adhesive fixation system is able to secure bone fragments from the non-load bearing midfacial regions in their orthotopic positions until fracture consolidation is complete. (Source: BioMedical Engineering OnLine... BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=1453912 Mon, 19 May 2008 04:00:00 +0100 1453912 http://www.medworm.com/index.php?rid=1366501&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F7%2F1%2F14 This work presents a non-invasive high-throughput system for automatically detecting characteristic behaviours in mice over extended periods of time, useful for phenotyping experiments. The system classifies time intervals on the order of 2 to 4 seconds as corresponding to motions consistent with either active wake or inactivity associated with sleep. A single Polyvinylidine Difluoride (PVDF) sensor on the cage floor generates signals from motion resulting in pressure. This paper develops a linear classifier based on robust features extracted from normalized power spectra and autocorrelation functions, as well as novel features from the collapsed average (autocorrelation of complex spectrum), which characterize transient and periodic properties of the signal envelope. Performance is analyz... BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=1366501 Fri, 11 Apr 2008 04:00:00 +0100 1366501 http://www.medworm.com/index.php?rid=1334390&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F7%2F1%2F13 Conclusions: The work shows that FFDM systems provide a quantitative output and suggests that the calibration quantities presented here may be used for data acquired on similar FFDM systems. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=1334390 Fri, 28 Mar 2008 04:00:00 +0100 1334390 http://www.medworm.com/index.php?rid=1290899&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F7%2F1%2F12 Conclusions: Subjects' capacities to discriminate the amplitude difference between two vibrotactile stimulations was degraded as the inter-stimulus distance approached the limit of their two-point spatial discriminative capacity. This degradation of spatial discriminative capacity lessened when an adapting stimulus was used. Performance of the task, as well as improvement on the task with adaptation, would most likely be impaired if the cortical information processing capacity of a subject or subject population were systemically altered, and thus, the methods described could be effective measures for use in clinical or clinical research applications. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=1290899 Mon, 10 Mar 2008 04:00:00 +0100 1290899 http://www.medworm.com/index.php?rid=1274723&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F7%2F1%2F11 Conclusions: Our findings highlight the factors that have significant effects on MRI induced heating of implanted wires and leads. These factors must be taken into account by those who plan to study or model MRI heating of implants. Also our data should help those who wish to develop guidelines for defining safe medical implants for MRI patients. In addition, our database of the entire set of measurements can help those who wish to validate their numerical models of implants that may be exposed to MRI systems. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=1274723 Mon, 03 Mar 2008 05:00:00 +0100 1274723 http://www.medworm.com/index.php?rid=1268183&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F7%2F1%2F10 Conclusion: Laser lipolysis can be described by a theoretical model. Fat volume reduction observed in patients is in accordance with model calculations. Due to heat diffusion, temperature elevation is also produced inside the lower reticular dermis. This interesting observation can explain remodeling of the collagenous tissue, with clinically evident skin tightening. In conclusion, while the heat generated by interstitial laser irradiation provides stimulate lipolysis of the fat cells, the collagen and elastin are also stimulated resulting in a tightening in the skin. This mathematical model should serve as a useful tool to simulate and better understand the mechanism of action of the laser lipolysis (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=1268183 Fri, 29 Feb 2008 05:00:00 +0100 1268183 http://www.medworm.com/index.php?rid=1264969&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F7%2F1%2F9 Conclusions: Our results show that surgeons should feel relatively free to vary the outlet angle within the anatomic structural conditions when employing the technique of coronary reinsertion. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=1264969 Thu, 28 Feb 2008 05:00:00 +0100 1264969 http://www.medworm.com/index.php?rid=1194650&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F7%2F1%2F7 Conclusions: Our measurements of the magnitude and the spatial distribution of low frequency magnetic flux density emissions by 4 different models of iPod portable music players. Levels of less than 0.2 IT exist very close (1 cm) from the case. The measured voltages induced inside an ainstrumented-cana pacemaker were below the noise level of our instruments. Based on the observations of our in-vitro study we conclude that no interference effects can occur in pacemakers exposed to the iPod devices we tested. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=1194650 Fri, 01 Feb 2008 05:00:00 +0100 1194650 http://www.medworm.com/index.php?rid=1188340&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F7%2F1%2F6 Conclusions: Even with human-factor derived errors accumulated from segmentation of MRI images, and limited image quality, the matching accuracy of CT-&-MRI combined 3D models was 0.5+/-0.3 mm in terms of local anatomical inspection. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=1188340 Wed, 30 Jan 2008 05:00:00 +0100 1188340 http://www.medworm.com/index.php?rid=1166260&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F7%2F1%2F3 Conclusions: The distal locking screws pass through the Biomet Matthews Nail in a unique cruciate orientation. This allows for greater purchase in the bone of the femoral condyle and potentially improves the stability of the fracture fixation. As these fractures are usually in weak osteoporotic bone, the Biomet Matthews Nail represents a favourable surgical option in these patients. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=1166260 Mon, 21 Jan 2008 05:00:00 +0100 1166260 http://www.medworm.com/index.php?rid=1149496&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F7%2F1%2F2 Conclusions: Spatio-temporal simulations provide a method to understand, teach and analyze ST maps. This approach could be useful to determine characteristics of contractions under a variety of circumstances. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=1149496 Mon, 14 Jan 2008 05:00:00 +0100 1149496 http://www.medworm.com/index.php?rid=1106926&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F6%2F1%2F49 Conclusions: The new myograph is a highly reliable measuring device with which the adductor pollicis can be investigated at the optimum length. It has the potential to become a reliable and valid tool for diagnostic in the clinical setting and for monitoring neuromuscular diseases. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=1106926 Thu, 20 Dec 2007 05:00:00 +0100 1106926 http://www.medworm.com/index.php?rid=1099952&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F6%2F1%2F48 Conclusions: An anatomically and physiologically based model of the posterior motor neurons in the human lower limb was developed. This model can be used to examine the effect of external stimulation on nerve and muscle activity, as may occur, for example, in the field of FES. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=1099952 Mon, 17 Dec 2007 05:00:00 +0100 1099952 http://www.medworm.com/index.php?rid=1092832&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F6%2F1%2F47 Background: Arterial geometry variability is inevitable both within and across individuals. To ensure realistic prediction of cardiovascular flows, there is a need for efficient numerical methods that can systematically account for geometric uncertainty. Methods and results: A statistical framework based on Bayesian Gaussian process modeling was proposed for mining data generated from computer simulations. The proposed approach was applied to analyze the influence of geometric parameters on hemodynamics in the human carotid artery bifurcation. A parametric model in conjunction with a design of computer experiments strategy was used for generating a set of observational data that contains the maximum wall shear stress values for a range of probable arterial geometries. The dataset was mine... BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=1092832 Thu, 13 Dec 2007 05:00:00 +0100 1092832 http://www.medworm.com/index.php?rid=1069951&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F6%2F1%2F46 Conclusions: The novel flow chamber design provides predictable and well defined mechanical forces at the surface of a cell monolayer, showing improvement over previously tested commercial chambers. The predictability of the imparted stress improves both experiment repeatability as well as the accuracy of inter-study comparisons. Carefully controlling the stresses on cells is critical in effectively mimicking in vivo situations. Overall, the improved perfusion flow chamber provides the needed resolution, standardization and in vitro model analogous to in vivo conditions to make the step towards greater use in research and the opportunity to enter the diagnostic and therapeutic market. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=1069951 Tue, 04 Dec 2007 05:00:00 +0100 1069951 http://www.medworm.com/index.php?rid=1067038&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F6%2F1%2F45 Conclusions: This study shows that ANFIS real-time learning method coupled with mixed time and time-frequency features as EMG features can provide acceptable results for designing sEMG pattern recognition system suitable for hand prosthesis control. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=1067038 Mon, 03 Dec 2007 05:00:00 +0100 1067038 http://www.medworm.com/index.php?rid=1058221&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F6%2F1%2F44 Conclusions: This study provides a standardized protocol for avoiding any significant texture feature differences that may arise due to variability in the acquisition procedure or the lack of color correction. After applying the protocol, we have found that significant differences in texture features will only be due to the fact that the features were extracted from different types of tissue (normal vs abnormal). (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=1058221 Thu, 29 Nov 2007 05:00:00 +0100 1058221 http://www.medworm.com/index.php?rid=1053991&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F6%2F1%2F43 Conclusions: We have shown the design and fabrication of an SMP stent and a means of light delivery for photothermal actuation. Though further studies are required to optimize the device and assess thermal tissue damage, photothermal actuation of the SMP stent was demonstrated. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=1053991 Tue, 27 Nov 2007 05:00:00 +0100 1053991 http://www.medworm.com/index.php?rid=1017107&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F6%2F1%2F42 Conclusions: In summary, the applicability of the TFAS approach to diffusion tensor imaging studies of normal and pathologically altered brains was demonstrated. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=1017107 Fri, 09 Nov 2007 05:00:00 +0100 1017107 http://www.medworm.com/index.php?rid=1002726&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F6%2F1%2F41 It is well established that vascularization is critical for osteogenesis. However, dequate vascularization also remains one of the major challenges in tissue engineering of bone. This problem is further accentuated in regeneration of large volume of tissue. Although a complex process, vascularization involves reciprocal regulation and functional interaction between endothelial and osteoblast-like cells during osteogenesis. This prompted us to investigate the possibility of producing bone tissue both in vitro and ectopically in vivo using vascular endothelial cells because we hypothesized that the direct contact or interaction between vascular endothelial cells and bone marrow mesenchymal stem cells are of benefit to osteogenesis in vitro and in vivo. For that purpose we co-cultured rat bon... BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=1002726 Sun, 04 Nov 2007 04:00:00 +0100 1002726 http://www.medworm.com/index.php?rid=969848&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F6%2F1%2F39 Conclusions: The structure of the intestinal wall affected the potential gradient through the wall and the orientation and magnitude of the dipole vector. We have seen that the models with a symmetrical wall structure and extreme anisotropic conductivities had similar characteristics in their dipole magnitudes and orientations to the 1D model. If efficient 1D models are used instead of 3D models, then both the differences in magnitude and orientation need to be accounted for. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=969848 Mon, 22 Oct 2007 04:00:00 +0100 969848 http://www.medworm.com/index.php?rid=964176&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F6%2F1%2F38 Conclusions: The results here show that using more realistic parameters affect resulting wall stress. The use of simplified computational modelling methods can lead to inaccurate stress distributions. Care should be taken when examining stress results found using simplified techniques, in particular, if the wall stress results are to have clinical importance. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=964176 Fri, 19 Oct 2007 04:00:00 +0100 964176 http://www.medworm.com/index.php?rid=950811&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F6%2F1%2F37 Conclusions: Based on our analytical and numerical models of the local electric field distribution we show that the applied voltage, configuration of the electrodes and electrode position, need to be chosen specifically for each individual case and that numerical modeling can be used to optimize the appropriate electrode configuration and adequate voltage. Using numerical models we further calculate the needed voltage for a specific electrode configuration to achieve adequate E inside the target tissue while minimizing damages of the surrounding tissue. We present also analytical solutions, which provide a convenient rapid, but approximate method for a pre-analysis of electric field distribution in treated tissue. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=950811 Mon, 15 Oct 2007 04:00:00 +0100 950811 http://www.medworm.com/index.php?rid=925050&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F6%2F1%2F36 Background: Dynamic positron emission tomography studies produce a large amount of image data, from which clinically useful parametric information can be extracted using tracer kinetic methods. Data reduction methods can facilitate the initial interpretation and visual analysis of these large image sequences and at the same time can preserve important information and allow for basic feature characterization. Methods: We have applied principal component analysis to provide high-contrast parametric image sets of lower dimensions than the original data set separating structures based on their kinetic characteristics. Our method has the potential to constitute an alternative quantification method, independent of any kinetic model, and is particularly useful when the retrieval of the arterial i... BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=925050 Wed, 03 Oct 2007 04:00:00 +0100 925050 http://www.medworm.com/index.php?rid=905833&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F6%2F1%2F35 Conclusion: CFD analysis of venous CABG based on in-vivo CT datasets in patients was feasible producing qualitative and quantitative information on mass flow and WSS. Differences were found between the two types of anastomosis warranting further systematic application of the presented methodology on multiple patient datasets. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=905833 Wed, 26 Sep 2007 04:00:00 +0100 905833 http://www.medworm.com/index.php?rid=882169&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F6%2F1%2F34 Conclusions: Results of this study are the first to determine mineralization rates of TBA for different temperatures. The kinetic rates determined in this study can be used in groundwater fate and transport modelling of TBA at the Ronan, MT site and provide an estimate for TBA removal at other similar shallow aquifer sites and hyporheic zones as a function of seasonal change in temperature. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=882169 Wed, 19 Sep 2007 00:57:03 +0100 882169 http://www.medworm.com/index.php?rid=847072&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F6%2F1%2F33 Conclusion: The present study has shown that notochordal cells from dogs can attach to and grow on PPE:N surfaces. Analysis of the expression of different genes in these cells cultured on different N-functionalized surfaces indicates that cellular behaviour is gene-specific and time-dependent. Further studies are required to better understand the roles of specific surface functionalities on the cells' receptor sites, and their effects on cellular phenotypes. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=847072 Thu, 06 Sep 2007 04:00:00 +0100 847072 http://www.medworm.com/index.php?rid=818606&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F6%2F1%2F32 Conclusions: High degrees of classifier parameter, structure and feature subset tailoring on individual levels substantially increase single-trial EEG classification rates, an important consideration in areas where highly accurate detection rates are essential. Also, the presented method provides insight into the spatial characteristics of finger movement EEG patterns. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=818606 Thu, 23 Aug 2007 04:00:00 +0100 818606 http://www.medworm.com/index.php?rid=740349&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F6%2F1%2F31 Conclusions: The remaining activity of heparin was found to be highest for the covalent attachment with Triamino-APMS as coupling agent due to the long chain of this spacer molecule and therefore the highest mobility of the drug. Furthermore, the adsorption of fibrinogen on the differently heparinised surfaces in real time demonstrated that with longer spacer chains the deltaD/deltaf ratios became higher, which is also associated with better biocompatible properties of the substrates in contact with a biosystem. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=740349 Tue, 17 Jul 2007 04:00:00 +0100 740349 http://www.medworm.com/index.php?rid=737418&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F6%2F1%2F30 Conclusion: Saline perfusion at around 2 mm from the electrode surface while using an ICE in RFA improves deposition of energy and enlarges coagulation volume. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=737418 Mon, 16 Jul 2007 04:00:00 +0100 737418 http://www.medworm.com/index.php?rid=713802&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F6%2F1%2F28 Conclusions: The simultaneous recording and analysis of NIRS and VEP signals in humans during visual stimulation with a b/w pattern at variable contrast, demonstrates a strong linear correlation between hemodynamic changes and evoked potential amplitude. Furthermore both responses present a logarithmic profile with stimulus contrast. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=713802 Wed, 04 Jul 2007 04:00:00 +0100 713802 http://www.medworm.com/index.php?rid=712933&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F6%2F1%2F27 The present article reviews two recent books dealing with rather closely related subjects; in fact, they tend to complement and supplement reciprocally. Obviously, the electromyogram is a bioelectrical signal that often is mathematically manipulated in different ways to better extract its information. Moreover, its correlation with other bioelectric variables may become necessary. Reviewed books: Bioelectrical Signal Processing in Cardiac and Neurological Applications By Leif Sornmo and Pablo Laguna (8 chapters, 2 appendices, 668 pp) Published in 2005 by Elsevier Academic Press 30 Corporate Drive, Suite 400, Burlington, MA 01803, USA ISBN 13: 978-0-12-437552-9 ISBN 10: 0-12-437552-9 Electromyography: Physiology, Engineering, and Noninvasive Applications Edited by Roberto Merletti and P... BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=712933 Tue, 03 Jul 2007 04:00:00 +0100 712933 http://www.medworm.com/index.php?rid=708671&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F6%2F1%2F25 Conclusions: On the basis of our results we can conclude that the new system can be used in in-vitro gene electrotransfer to improve cell transfection by changing electric field direction between electrical pulses, without affecting cell survival. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=708671 Mon, 02 Jul 2007 04:00:00 +0100 708671 http://www.medworm.com/index.php?rid=701961&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F6%2F1%2F24 Conclusions: The developed strategy is an efficient approach to extract as much physiochemical information from the FRAP protocol as possible. Well-posedness analysis of the inverse problem, however, indicates that the FRAP protocol provides insufficient information for unique simultaneous estimation of diffusion coefficient and binding rate parameters. Care should be exercised in drawing inferences, from FRAP data, regarding concentrations of free and bound proteins, average binding and diffusion times, and protein mobility unless they are confirmed by long-range Markov Chain-Monte Carlo (MCMC) methods and experimental observations. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=701961 Thu, 28 Jun 2007 04:00:00 +0100 701961 http://www.medworm.com/index.php?rid=696473&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F6%2F1%2F23 Conclusions: Given the very large number of arbitrary parameters and computational complexity of existing techniques, these new techniques are far simpler and yet achieve clinically useful classification performance using only a basic classification technique. They do so by exploiting the inherent nonlinearity and turbulent randomness in disordered voice signals. They are widely applicable to the whole range of disordered voice phenomena by design. These new measures could therefore be used for a variety of practical clinical purposes. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=696473 Tue, 26 Jun 2007 04:00:00 +0100 696473 http://www.medworm.com/index.php?rid=672036&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F6%2F1%2F22 Conclusions: We conclude from the study that the aortic aneurysms as well as renal artery stenosis may be the most important determinant of the arteries rupture and failure. Furthermore, these pathologies play important rules in increase of the cardiovascular pulse pressure which leads to the hypertension. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=672036 Sat, 09 Jun 2007 04:00:00 +0100 672036 http://www.medworm.com/index.php?rid=649211&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F6%2F1%2F19 Conclusions: Using two series connected condensers in the ventilator expiratory line 55% of PFC liquid (FC-77) can be recovered during partial liquid ventilation without altering the function of the of the ventilator circuit. This volume of PFC recovered was just over twice that recovered with the condensers connected to the ventilator exhaust outlet. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=649211 Thu, 31 May 2007 04:00:00 +0100 649211 http://www.medworm.com/index.php?rid=596054&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F6%2F1%2F17 Conclusions: An anatomically and physiologically realistic computational model of the major mesenteric arteries has been developed for the gastrointestinal system. Using this model, blood flow has been simulated which show physiologically realistic flow profiles. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=596054 Tue, 08 May 2007 04:00:00 +0100 596054 http://www.medworm.com/index.php?rid=596055&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F6%2F1%2F16 A new method and application is proposed to characterize intensity and pitch of human heart sounds and murmurs. Using recorded heart sounds from the library of one of the authors, a visual map of heart sound energy was established. Both normal and abnormal heart sound recordings were studied. Representation is based on Wigner-Ville joint time-frequency transformations. The proposed methodology separates acoustic contributions of cardiac events simultaneously in pitch, time and energy. The resolution accuracy is superior to any other existing spectrogram method. The characteristic energy signature of the innocent heart murmur in a child with the S3 sound is presented. It allows clear detection of S1, S2 and S3 sounds, S2 split, systolic murmur, and intensity of these components. The origina... BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=596055 Fri, 04 May 2007 04:00:00 +0100 596055 http://www.medworm.com/index.php?rid=556716&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F6%2F1%2F14 Conclusions: The present model can be applied to test complex hypotheses during exercise involving the integration and control of metabolic processes at various organizational levels (cellular to tissue) in individuals who have undergone periods of chronic loading or unloading. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=556716 Fri, 20 Apr 2007 04:00:00 +0100 556716 http://www.medworm.com/index.php?rid=556717&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F6%2F1%2F13 Conclusions: The mechanical and electrical design of a device for monitoring electrocardiogram electrode belt tension is described. Within the typical range of application tension, cardiovascular and respiratory function are not substantially negatively affected by electrode belt force. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=556717 Thu, 19 Apr 2007 04:00:00 +0100 556717 http://www.medworm.com/index.php?rid=542979&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F6%2F1%2F11 Conclusions: The new automated system enables rapid and reliable analysis of undifferentiated growth dynamics of hESCs. We demonstrate the effectiveness of the system by comparing hESC growth in different culture conditions. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=542979 Thu, 12 Apr 2007 04:00:00 +0100 542979 http://www.medworm.com/index.php?rid=456260&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F6%2F1%2F8 Conclusions: The results indicate that direct temperature measurements should be taken (1) as close as possible to the plaque/lumen surface, as the calculations show a significant drop in temperature within 120 micrometers from the plaque surface; (2) in the presence of blood flow, temperature measurement should be performed in the downstream edge of the plaque, as it shows higher temperature independently of the arterial geometry; and (3) it is necessary to perform measurements at a sampling rate that is higher than the cardiac cycle; the measurement should be extended through several cardiac cycles, as variations of up to 0.7 degrees Celsius were observed at l/ = 0.7 for the bending artery. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=456260 Thu, 01 Mar 2007 05:00:00 +0100 456260 http://www.medworm.com/index.php?rid=415097&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F6%2F1%2F6 Conclusion: The non-localizing nature of early ST segment depression could be due to global epicardial and endocardial transmembrane potential gradients related to the activation/repolarization sequence, whereas the possibly localizing nature of late ST segment depression could be due to the relative removal of the epicardial gradient, and an increase of the transmembrane potential gradient across the endocardium. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=415097 Fri, 09 Feb 2007 07:00:00 +0100 415097 http://www.medworm.com/index.php?rid=388897&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F6%2F1%2F5 (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=388897 Wed, 31 Jan 2007 07:00:00 +0100 388897 http://www.medworm.com/index.php?rid=388898&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F6%2F1%2F4 System Modeling in Cellular Biology: From Concepts to Nuts and Bolts by Szallasi, Stelling and Periwal introduces the relevant concepts, terminology, and techniques of this field of science. It emphasises the modelling and computational challenges of taking a multidisciplinary approach to biology. This book provides a comprehensive introduction to systems biology and will form a valuable resource for students, teachers and researchers from both experimental and theoretical disciplines. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=388898 Tue, 30 Jan 2007 07:00:00 +0100 388898 http://www.medworm.com/index.php?rid=456261&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F6%2F1%2F4 "System Modeling in Cellular Biology: From Concepts to Nuts and Bolts" by Szallasi, Stelling and Periwal introduces the relevant concepts, terminology, and techniques of this field of science. It emphasises the modelling and computational challenges of taking a multidisciplinary approach to biology. This book provides a comprehensive introduction to systems biology and will form a valuable resource for students, teachers and researchers from both experimental and theoretical disciplines. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=456261 Tue, 30 Jan 2007 05:00:00 +0100 456261 http://www.medworm.com/index.php?rid=456262&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F6%2F1%2F3 Conclusion: When extracellular electrophysiologic recordings are made from systems containing large numbers of neural structures, it is important to interpret measured auto and cross covariance functions cautiously in light of the long range nature of the electric fields. Using recording electrodes that are bipolar or quadrupolar minimizes or eliminates these effects and hence these electrodes are preferred when electrical recordings are made for the purpose of auto and cross correlation analysis of local electrical activity. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=456262 Tue, 16 Jan 2007 05:00:00 +0100 456262 http://www.medworm.com/index.php?rid=343978&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F6%2F1%2F1 Conclusions: We have introduced a new technical solution for valid, reproducible in vivo force measurements on every possible point of the stretching curve. Thus it should be possible to study the muscle contraction in vivo to the same level of accuracy as is achieved in tests with in vitro organ preparations. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=343978 Tue, 02 Jan 2007 07:00:00 +0100 343978 http://www.medworm.com/index.php?rid=343979&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F5%2F1%2F65 Electronic Nose based ENT bacteria identification in hospital environment is a classical and challenging problem of classification. In this paper an electronic nose (e-nose), comprising a hybrid array of 12 tin oxide sensors (SnO2) and 6 conducting polymer sensors has been used to identify three species of bacteria, Escherichia coli (E. coli), Staphylococcus aureus (S. aureus), and Pseudomonas aeruginosa (P. aeruginosa) responsible for ear nose and throat (ENT) infections when collected as swab sample from infected patients and kept in ISO agar solution in the hospital environment. In the next stage a sub-classification technique has been developed for the classification of two different species of S. aureus, namely Methicillin-Resistant S. aureus (MRSA) and Methicillin Susceptible S. aure... BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=343979 Mon, 18 Dec 2006 07:00:00 +0100 343979 http://www.medworm.com/index.php?rid=343980&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F5%2F1%2F64 "Stochastic Modelling for Systems Biology" by Darren Wilkinson introduces the peculiarities of stochastic modelling in biology. This book is particularly suited to as a textbook or for self-study, and for readers with a theoretical background. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=343980 Wed, 13 Dec 2006 07:00:00 +0100 343980 http://www.medworm.com/index.php?rid=343981&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F5%2F1%2F63 This paper demonstrates experimentally how quantitative phase information can be obtained in scanning holographic microscopy. Scanning holography can operate in both coherent and incoherent modes, simultaneously if desired, with different detector geometries. A spatially integrating detector provides an incoherent hologram of the object's intensity distribution (absorption and/or fluorescence, for example), while a point detector in a conjugate plane of the pupil provides a coherent hologram of the object's complex amplitude, from which a quantitative measure of its phase distribution can be extracted. The possibility of capturing simultaneously holograms of three-dimensional specimens, leading to three-dimensional reconstructions with absorption contrast, reflectance contrast, fluorescenc... BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=343981 Tue, 28 Nov 2006 07:00:00 +0100 343981 http://www.medworm.com/index.php?rid=343982&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F5%2F1%2F61 This article is an invited review of the third edition of "Biomedical Informatics; Computer Applications in Health Care and Biomedicine", one of thirty-six volumes in Springer's 'Health Informatics Series', edited by E. Shortliffe and J. Cimino. This book spans most of the current methods and issues in health informatics, ranging through subjects as varied as data acquisition and storage, standards, natural language processing, imaging, electronic health records, decision support, teaching methods and ethics. The book is aimed at 'healthcare professionals', and is certainly appropriate for the non-technical informatics user. However, this book is also excellent background reading for the technical engineer who may be interested in the possible problems that confront the users in this field... BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=343982 Tue, 21 Nov 2006 07:00:00 +0100 343982 http://www.medworm.com/index.php?rid=343983&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F5%2F1%2F60 Conclusion: The described method produces reasonably accurate results and may be best suited for problems where computational speed and convenience have a higher priority than very high levels of accuracy. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=343983 Fri, 17 Nov 2006 07:00:00 +0100 343983 http://www.medworm.com/index.php?rid=343984&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F5%2F1%2F59 Conclusion: This paper presents a new approach to the reconstruction of an aneurysm model based on the use of several sets of MR images. This enables more accurate representation of not only the lumen but also the wall surface of a TAA taking account of intraluminal thrombus. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=343984 Thu, 02 Nov 2006 07:00:00 +0100 343984 http://www.medworm.com/index.php?rid=343985&cid=s_34018_169_f&fid=34018&url=http%3A%2F%2Fwww.biomedical-engineering-online.com%2Fcontent%2F5%2F1%2F58 Conclusion: The operation results for both patients are quantified. The quantification shows treatment details for both interventions (e.g. the elimination of the discontinuities for CRT intervention and the segments treated for SVR intervention). The LV quantification is feasible in the cardiac OR and it gives a detailed and immediate quantitative feedback of the quality of the intervention to the medical. (Source: BioMedical Engineering OnLine) BioMedical Engineering OnLine journals http://www.medworm.com/rss/comments.php?id=343985 Tue, 31 Oct 2006 07:00:00 +0100 343985