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Study of age-related changes in postural control during quiet standing through Linear Discriminant AnalysisEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: BioMedical Engineering OnLine - November 18, 2009 Category: Biomedical Engineering Authors: Guilherme CavalheiroMaria Fernanda AlmeidaAdriano PereiraAdriano Andrade Source Type: journals

Endothelial cells influence the osteogenic potential of bone marrow stromal cellsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: BioMedical Engineering OnLine - November 17, 2009 Category: Biomedical Engineering Authors: Ying XueZhe XingSolve HellemKristina ArvidsonKamal Mustafa Source Type: journals

Enzymatic digestion of articular cartilage results in viscoelasticity changes that are consistent with polymer dynamics mechanismsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: BioMedical Engineering OnLine - November 4, 2009 Category: Biomedical Engineering Authors: Ronald JuneDavid Fyhrie Source Type: journals

The development of 3-D, in vitro, endothelial culture models for the study of coronary artery diseaseEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 use...
Source: BioMedical Engineering OnLine - October 28, 2009 Category: Biomedical Engineering Authors: Monica FarcasLeonie RouleauRichard FraserRichard Leask Source Type: journals

Robust algorithm for arrhythmia classification in ECG using extreme learning machineEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: BioMedical Engineering OnLine - October 28, 2009 Category: Biomedical Engineering Authors: Jinkwon KimHang Sik ShinKwangsoo ShinMyoungho Lee Source Type: journals

Classification of BMI control commands from rat's neural signals using extreme learning machineEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 contr...
Source: BioMedical Engineering OnLine - October 28, 2009 Category: Biomedical Engineering Authors: Youngbum LeeHyunjoo LeeJinkwon KimHyung-Cheul ShinMyoungho Lee Source Type: journals

Automatic noninvasive measurement of systolic blood pressure using photoplethysmographyEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: BioMedical Engineering OnLine - October 26, 2009 Category: Biomedical Engineering Authors: Meir NitzanAmikam PatronZehava GlikAbraham Weiss Source Type: journals

Biomechanical analysis of the relation between movement time and joint moment development during a sit-to-stand taskEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 qua...
Source: BioMedical Engineering OnLine - October 21, 2009 Category: Biomedical Engineering Authors: Shinsuke YoshiokaAkinori NaganoDean HaySenshi Fukashiro Source Type: journals

Fluid-structure interaction of a patient-specific abdominal aortic aneurysm treated with an endovascular stent-graftEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: BioMedical Engineering OnLine - October 5, 2009 Category: Biomedical Engineering Authors: David MolonyAnthony CallananEamon KavanaghMichael WalshTim McGloughlin Source Type: journals

Effects of dielectric permittivities on skin heating due to millimeter wave exposureEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: BioMedical Engineering OnLine - September 22, 2009 Category: Biomedical Engineering Authors: Akio KanezakiAkimasa HirataSoichi WatanabeHiroshi Shirai Source Type: journals

Non-linear dielectric spectroscopy of microbiological suspensionsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: BioMedical Engineering OnLine - September 21, 2009 Category: Biomedical Engineering Authors: Ernesto TreoCarmelo Felice Source Type: journals

Complex Correlation Measure: a novel descriptor for Poincare plotEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Conclusions: Hence, CCM can be used as an additional Poincare plot descriptor to detect pathology. (Source: BioMedical Engineering OnLine)
Source: BioMedical Engineering OnLine - August 12, 2009 Category: Biomedical Engineering Authors: Chandan KarmakarAhsan KhandokerJayavardhana GubbiMarimuthu Palaniswami Source Type: journals

Facial expression (mood) recognition from facial images using committee neural networksEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 ...
Source: BioMedical Engineering OnLine - August 4, 2009 Category: Biomedical Engineering Authors: Saket KulkarniNarender ReddyS Hariharan Source Type: journals

Local critical stress correlates better than global maximum stress with plaque morphological features linked to atherosclerotic plaque vulnerability: an in vivo multi-patient studyEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 m...
Source: BioMedical Engineering OnLine - August 2, 2009 Category: Biomedical Engineering Authors: Dalin TangZhongzhao TengGador CantonThomas HatsukamiLi DongXueying HuangChun Yuan Source Type: journals

Book review of "Structural Bioinformatics: An Algorithmic Approach" by Forbes J. BurkowskiEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Book detailsForbes J. BurkowskiStructural Bioinformatics: An Algorithmic ApproachChapman & Hall/CRC Mathematical & Computational Biology, 2008:406 pages. ISBN: 1584886838 (Source: BioMedical Engineering OnLine)
Source: BioMedical Engineering OnLine - July 23, 2009 Category: Biomedical Engineering Authors: Ilza Pajeva Source Type: journals

Artificial arterial blood pressure artifact models and an evaluation of a robust blood pressure and heart rate estimatorEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: BioMedical Engineering OnLine - July 7, 2009 Category: Biomedical Engineering Authors: Qiao LiRoger MarkGari Clifford Source Type: journals

Response of tibialis anterior tendon to a chronic exposure of stretch-shortening cycles: age effectsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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...
Source: BioMedical Engineering OnLine - June 28, 2009 Category: Biomedical Engineering Authors: James EnseyMelinda HollanderJohn WuMichael KashonBrent BakerRobert Cutlip Source Type: journals

Growth rate and rupture rate of unruptured intracranial aneurysms: a population approachEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: BioMedical Engineering OnLine - June 17, 2009 Category: Biomedical Engineering Authors: Liang-Der JouMichel Mawad Source Type: journals

Reproducibility & repeatability of measuring the electrical impedance of the pregnant human cervix- the effect of probe size and applied pressure.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: BioMedical Engineering OnLine - June 16, 2009 Category: Biomedical Engineering Authors: Roobin JokhiVidita GhuleBrian BrownDilly Anumba Source Type: journals

A Novel Segmentation, Mutual Information Network Framework for EEG Analysis of Motor TasksEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: BioMedical Engineering OnLine - May 4, 2009 Category: Biomedical Engineering Authors: Z. Jane Wang, Pamela Lee and Martin J McKeown Source Type: journals

Evaluation of the effect of stent strut profile on shear stress distribution using statistical momentsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 a...
Source: BioMedical Engineering OnLine - April 30, 2009 Category: Biomedical Engineering Authors: Juan Mejia, Rosaire Mongrain, Bilal Ruzzeh, Richard Leask and Olivier F. Bertrand Source Type: journals

Numerical investigations on the strain-adaptive bone remodelling in the periprosthetic femur: Influence of the boundary conditionsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: BioMedical Engineering OnLine - April 16, 2009 Category: Biomedical Engineering Authors: Bernd-Arno Behrens, Ingo Nolte, Patrick Wefsteadt, Christina Stukenborg-Colsman and Anas Bouguecha Source Type: journals

Research and development of a new RF-assisted device for bloodless rapid transection of the liver: Computational modeling and in vivo experimentsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: BioMedical Engineering OnLine - March 18, 2009 Category: Biomedical Engineering Authors: Fernando Burdio, Enrique J Berjano, Ana Navarro, Jose M Burdio, Luis Grande, Ana Gonzalez, Ignacio Cruz, Antonio Guemes, Ramon Sousa, Jorge Subira, Tomas Castiella, Ignasi Poves and Juan L Lequerica Source Type: journals

Robust EMG sensing system based on data fusion for myoelectric control of a robotic armEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: BioMedical Engineering OnLine - February 25, 2009 Category: Biomedical Engineering Authors: Natalia M López, Fernando di Sciascio, Carlos M Soria and Max E Valentinuzzi Source Type: journals

Robust EMG sensing system based on data fusion for myoelectric control of a robotic arm.Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: BioMedical Engineering OnLine - February 25, 2009 Category: Biomedical Engineering Authors: Natalia M Lopez, Fernando di Sciascio, Carlos M Soria and Max E Valentinuzzi Source Type: journals

Neural network committees for finger joint angle estimation from surface EMG signalsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: BioMedical Engineering OnLine - January 20, 2009 Category: Biomedical Engineering Authors: Nikhil A Shrirao, Narender P Reddy and Durga R Kosuri Source Type: journals

Medical imaging and physiological modelling: linking physics and biologyEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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...
Source: BioMedical Engineering OnLine - January 12, 2009 Category: Biomedical Engineering Authors: Manuchehr Soleimani, Rebecca J Shipley, Nic Smith and Cathryn N Mitchell Source Type: journals

Tremor suppression in ECGEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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...
Source: BioMedical Engineering OnLine - November 19, 2008 Category: Biomedical Engineering Authors: Ivan A Dotsinsky and Georgy S Mihov Source Type: journals

Hemodynamic diagnostics of epicardial coronary stenoses: in-vitro experimental and computational studyEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: BioMedical Engineering OnLine - August 27, 2008 Category: Biomedical Engineering Authors: Rupak K Banerjee, Koustubh D Ashtekar, Tarek A Helmy, Mohamed A Effat, Lloyd H Back and Saeb F Khoury Source Type: journals

High-tech biomedical research: lessons from Iran's experienceEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: BioMedical Engineering OnLine - May 23, 2008 Category: Biomedical Engineering Authors: Ali Samadikuchaksaraei and Kazem Mousavizadeh Source Type: journals

A model-based time-reversal of left ventricular motion improves cardiac motion analysis using tagged MRI dataEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: BioMedical Engineering OnLine - May 19, 2008 Category: Biomedical Engineering Authors: Tareq Alrefae, Irina V. Smirnova, Larry T. Cook and Mehmet Bilgen Source Type: journals

A new adhesive technique for internal fixation in midfacial surgeryEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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...
Source: BioMedical Engineering OnLine - May 19, 2008 Category: Biomedical Engineering Authors: Kira Endres, Rudolf Marx, Joachim Tinschert, Dieter Christian Wirtz, Christian Stoll, Dieter Riediger and Ralf Smeets Source Type: journals

Assessment of a non-invasive high-throughput classifier for behaviours associated with sleep and wake in miceEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 fea...
Source: BioMedical Engineering OnLine - April 11, 2008 Category: Biomedical Engineering Authors: Kevin D Donohue, Dharshan C Medonza, Eli R Crane and Bruce F O'Hara Source Type: journals

Effective x-ray attenuation coefficient measurements from two full field digital mammography systems for data calibration applicationsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: BioMedical Engineering OnLine - March 28, 2008 Category: Biomedical Engineering Authors: John J Heine and Jerry A Thomas Source Type: journals

A quantitative method for determining spatial discriminative capacityEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 cli...
Source: BioMedical Engineering OnLine - March 10, 2008 Category: Biomedical Engineering Authors: Zheng Zhang, Vinay Tannan, Jameson K Holden, Robert G Dennis and Mark Tommerdahl Source Type: journals

Complexity of MRI induced heating on metallic leads: experimental measurements of 374 configurationsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: BioMedical Engineering OnLine - March 3, 2008 Category: Biomedical Engineering Authors: Eugenio Mattei, Michele Triventi, Giovanni Calcagnini, Federica Censi, Wolfgang Kainz, Gonzalo Mendoza, Howard I Bassen and Pietro Bartolini Source Type: journals

Mathematical modeling of laser lipolysisEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 ...
Source: BioMedical Engineering OnLine - February 29, 2008 Category: Biomedical Engineering Authors: Serge R Mordon, Benjamin Wassmer, Jean Pascal Reynaud and Jaouad Zemmouri Source Type: journals

Influence on fluid dynamics of coronary artery outlet angle variation in artificial aortic root prosthesisEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: BioMedical Engineering OnLine - February 28, 2008 Category: Biomedical Engineering Authors: Janko F. Verhey and Christoph Bara Source Type: journals

Low frequency magnetic emissions and resulting induced voltages in a pacemaker by iPod portable music playersEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: BioMedical Engineering OnLine - February 1, 2008 Category: Biomedical Engineering Authors: Howard Bassen Source Type: journals

Anatomical evaluation of CT-MRI combined femoral modelEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: BioMedical Engineering OnLine - January 30, 2008 Category: Biomedical Engineering Authors: Yeon S Lee, Jong K Seon, Vladmir I Shin, Gyu-ha Kim and Moongu Jeon Source Type: journals

Comparative endurance testing of the Biomet Matthews nail and the dynamic compression screw, in simulated condylar and supracondylar femoral fracturesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: BioMedical Engineering OnLine - January 21, 2008 Category: Biomedical Engineering Authors: Laurence M O'Connor-Read, Jerome A Davidson, Benjamin M Davies, Michael G Matthews and Paul Smirthwaite Source Type: journals

Simulation and analysis of spatio-temporal maps of gastrointestinal motilityEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: BioMedical Engineering OnLine - January 14, 2008 Category: Biomedical Engineering Authors: Wim JEP Lammers and Leo K Cheng Source Type: journals

Assessment of precision and reproducibility of a new myographEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: BioMedical Engineering OnLine - December 20, 2007 Category: Biomedical Engineering Authors: Niels Rahe-Meyer, Michael Winterhalter, Aminul ISLAM Achmed, Christian Weilbach, Matthias Gross, Siegfried Piepenbrock and Matthias Pawlak Source Type: journals

Anatomically based lower limb nerve model for electrical stimulationEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: BioMedical Engineering OnLine - December 17, 2007 Category: Biomedical Engineering Authors: Juliana HK Kim, John B Davidson, Oliver Rohrle, Tanya K Soboleva and Andrew J Pullan Source Type: journals

Mining data from hemodynamic simulations via Bayesian emulationEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 strateg...
Source: BioMedical Engineering OnLine - December 13, 2007 Category: Biomedical Engineering Authors: Vijaya B Kolachalama, Neil W Bressloff and Prasanth B Nair Source Type: journals

Open access to novel dual flow chamber technology for in vitro cell mechanotransduction, toxicity and pharamacokinetic studiesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 ...
Source: BioMedical Engineering OnLine - December 4, 2007 Category: Biomedical Engineering Authors: Eric J Anderson and Melissa L Knothe Tate Source Type: journals

Real-time intelligent pattern recognition algorithm for surface EMG signalsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: BioMedical Engineering OnLine - December 3, 2007 Category: Biomedical Engineering Authors: Mahdi Khezri and Mehran Jahed Source Type: journals

A standardised protocol for texture feature analysis of endoscopic images in gynaecological cancerEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: BioMedical Engineering OnLine - November 29, 2007 Category: Biomedical Engineering Authors: Marios S Neofytou, Vasilios Tanos, Marios S Pattichis, Constantinos S Pattichis, Efthyvoulos C Kyriacou and Dimitris D Koutsouris Source Type: journals

Fabrication and in vitro deployment of a laser-activated shape memory polymer vascular stentEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: BioMedical Engineering OnLine - November 27, 2007 Category: Biomedical Engineering Authors: Geraldine M Baer, Ward Small, Thomas S Wilson, William J Benett, Dennis L Matthews, Jonathan Hartman and Duncan J Maitland Source Type: journals

Diffusion tensor imaging and tractwise fractional anisotropy statistics: quantitative analysis in white matter pathologyEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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)
Source: BioMedical Engineering OnLine - November 9, 2007 Category: Biomedical Engineering Authors: Hans-Peter Mueller, Alexander Unrath, Anne D. Sperfeld, Albert C. Ludolph, Axel Riecker and Jan Kassubek Source Type: journals