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Biomedical Engineering

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(Source: Medical Engineering and Physics)
Source: Medical Engineering and Physics - July 29, 2014 Category: Biomedical Engineering Source Type: research

Continuing the quest for better stroke therapies
(New Jersey Institute of Technology) Helping people recover from the debilitating effects of a stroke is an immensely complex challenge that requires deep knowledge of neurophysiology as well as effective therapy. Advancing such knowledge to improve therapeutic options and outcomes has been the primary focus of research by Sergei Adamovich, associate professor of biomedical engineering, since he joined the NJIT faculty more than a decade ago. (Source: EurekAlert! - Biology)
Source: EurekAlert! - Biology - July 29, 2014 Category: Biology Source Type: news

Shoulder motor performance assessment in the sagittal plane in children with hemiplegia during single joint pointing tasks
Conclusions: Results suggest the presence of a different control strategy for fast movements in particular during lowering phase. Results suggest that motor control is not able to optimize Jerk and Torque-change cost functions in the same way when controls the two arms, suggesting that children with hemiplegia do not actively control MA lowering fast movements, in order to take advantage of the passive inertial body properties, rather than to attempt its optimal control. (Source: BioMedical Engineering OnLine)
Source: BioMedical Engineering OnLine - July 29, 2014 Category: Biomedical Engineering Authors: Domenico FormicaMaurizio PetrarcaStefano RossiLoredana ZolloEugenio GuglielmelliPaolo Cappa Source Type: research

A new method to measure higher visual functions in an immersive environment
Conclusions: A new method to measure higher visual functions in an immersive environment was presented. The study focused on the usability of the developed battery rather than the performance at the visual tasks. A battery of five subtasks to study the perception of size, shape, orientation, speed and motion direction was developed. The test setup is now ready to be tested in neurological patients. (Source: BioMedical Engineering OnLine)
Source: BioMedical Engineering OnLine - July 28, 2014 Category: Biomedical Engineering Authors: Giuseppe ZitoRené MüriUrs MosimannThomas NyffelerTobias Nef Source Type: research

Robust heart sound detection in respiratory sound using LRT with maximum a based online parameter adaptation
This paper investigates the utility of a likelihood ratio test (LRT) combined with an efficient adaptation procedure for the purpose of detecting the heart sound (HS) with lung sound and the lung sound only (non-HS) segments in a respiratory signal. The proposed detection method has four main stages: feature extraction, training of the models, detection, and adaptation of the model parameter. In the first stage, the logarithmic energy features are extracted for each frame of respiratory sound. In the second stage, the probabilistic models for HS and non-HS segments are constructed by training Gaussian mixture models (GMMs)...
Source: Medical Engineering and Physics - July 28, 2014 Category: Biomedical Engineering Authors: Hamed Shamsi, I. Yucel Ozbek Source Type: research

dermal and epidermal cellular response to titanium alloy implants fabricated with electron beam melting
Most prosthetic devices for limb amputees attach to the limb stump via a socket, however socket prostheses can create abnormal pressure and friction on soft tissues, particularly for lower limb amputations, resulting in tissue injury and other complications [1]. An emerging alternative is the transdermal osseointegrated prosthesis (TOP) [2]. A TOP is an implanted device that is affixed directly to bone of the limb stump and passes through the skin to provide a secure attachment for an external prosthesis. (Source: Medical Engineering and Physics)
Source: Medical Engineering and Physics - July 28, 2014 Category: Biomedical Engineering Authors: Jessica Collins Springer, Ola L.A. Harrysson, Denis J. Marcellin-Little, Susan H. Bernacki Source Type: research

Does surface roughness influence the primary stability of acetabular cups? A numerical and experimental biomechanical evaluation
Most acetabular cups implanted today are press-fit impacted cementless. Anchorage begins with the primary stability given by insertion of a slightly oversized cup. This primary stability is key to obtaining bone ingrowth and secondary stability. We tested the hypothesis that primary stability of the cup is related to surface roughness of the implant, using both an experimental and a numerical models to analyze how three levels of surface roughness (micro, macro and combined) affect the primary stability of the cup. (Source: Medical Engineering and Physics)
Source: Medical Engineering and Physics - July 28, 2014 Category: Biomedical Engineering Authors: Sophie Le Cann, Alexandre Galland, Benoît Rosa, Thomas Le Corroller, Martine Pithioux, Jean-Noël Argenson, Patrick Chabrand, Sébastien Parratte Source Type: research

Effect of fixation on neovascularization during bone healing
The complex process of bone repair is closely related to the local mechanical and biological environments, the combined influence of which can lead to different results: successful healing, delayed healing, or even non-union [1–4]. However, the knowledge about the interaction among mechanical environment, biological environment and bone healing, is still quite limited. (Source: Medical Engineering and Physics)
Source: Medical Engineering and Physics - July 28, 2014 Category: Biomedical Engineering Authors: Feng Zhao, Zhilun Zhou, Yang Yan, Zhen Yuan, Guanzhong Yang, Hao Yu, Hao Su, Tao Zhang, Yubo Fan Source Type: research

Design and validation of a cadaveric knee joint loading device compatible with magnetic resonance imaging and computed tomography
Design and validation of a magnetic resonance and computed tomography compatible device capable of applying physiologically relevant muscle forces to cadaveric knee joints with high levels of repeatability and reproducibility. (Source: Medical Engineering and Physics)
Source: Medical Engineering and Physics - July 28, 2014 Category: Biomedical Engineering Authors: Larry Chen, Karen Gordon, Mark Hurtig Source Type: research

Application of Time-Delay Absorber to Suppress Vibration of a Dynamical System to Tuned Excitation.
Abstract In this work, we present a comprehensive investigation of the time delay absorber effects on the control of a dynamical system represented by a cantilever beam subjected to tuned excitation forces. Cantilever beam is one of the most widely used system in too many engineering applications, such as mechanical and civil engineering. The main aim of this work is to control the vibration of the beam at simultaneous internal and combined resonance condition, as it is the worst resonance case. Control is conducted via time delay absorber to suppress chaotic vibrations. Time delays often appear in many control sys...
Source: Journal of Vibration and Acoustics - July 27, 2014 Category: Biomedical Engineering Authors: El-Ganaini WA, El-Gohary HA Tags: J Vib Acoust Source Type: research

Baseline drift removal and denoising of MCG data using EEMD: Role of noise amplitude and the thresholding effect
We adopt the Ensemble Empirical Mode Decomposition (EEMD) method, with an appropriate thresholding on the Intrinsic Mode Functions (IMFs), to denoise the magnetocardiography (MCG) signal. To this end, we discuss the two associated problems that relate to: (i) the amplitude of noise added to the observed signal in the EEMD method with a view to prevent mode mixing and (ii) the effect of direct thresholding that causes discontinuities in the reconstructed denoised signal. We then denoise the MCG signals, having various signal-to-noise ratios, by using this method and compare the results with those obtained by the standard wa...
Source: Medical Engineering and Physics - July 26, 2014 Category: Biomedical Engineering Authors: N. Mariyappa, S. Sengottuvel, C. Parasakthi, K. Gireesan, M.P. Janawadkar, T.S. Radhakrishnan, C.S. Sundar Source Type: research

A novel stability and kinematics-driven trunk biomechanical model to estimate muscle and spinal forces
An anatomically detailed eighteen-rotational-degrees-of-freedom model of the human spine using optimization constrained to equilibrium and stability requirements is developed and used to simulate several symmetric tasks in upright and flexed standing postures. Predictions of this stability and kinematics-driven (S+KD) model for trunk muscle forces and spine compressive/shear loads are compared to those of our existing kinematics-driven (KD) model where both translational and rotational degrees-of-freedom are included but redundancy is resolved using equilibrium conditions alone. (Source: Medical Engineering and Physics)
Source: Medical Engineering and Physics - July 26, 2014 Category: Biomedical Engineering Authors: M. Hajihosseinali, N. Arjmand, A. Shirazi-Adl, F. Farahmand, M.S. Ghiasi Source Type: research

University of Houston researcher publishes textbook on tissue engineering
(University of Houston) Ravi Birla, associate professor of biomedical engineering at the University of Houston, has published his first book, 'Introduction to Tissue Engineering: Applications and Challenges.' The book offers a comprehensive guide to entering the field of artificial organ development. (Source: EurekAlert! - Medicine and Health)
Source: EurekAlert! - Medicine and Health - July 25, 2014 Category: Global & Universal Source Type: news

Backward Adaptation for Power Efficient Sampling
Advances in sampling and coding theory have contributed significantly towards lowering power consumption of resource-constrained devices, e.g. battery-operated sensor nodes, enabling them to operate for extended periods of time. In this paper, rate and energy efficiency of a recently proposed adaptive nonuniform sampling framework by Feizi , called Time-Stampless Adaptive Nonuniform Sampling (TANS), is examined and compared against state-of-the-art methods. TANS addresses one of the main limitations of nonuniform sampling schemes: sampling times do not need to be stored/transmitted since they can be computed using a functi...
Source: IEEE Transactions on Signal Processing - July 25, 2014 Category: Biomedical Engineering Source Type: research

Table of contents
Presents the table of contents for this issue of the periodical. (Source: IEEE Transactions on Signal Processing)
Source: IEEE Transactions on Signal Processing - July 25, 2014 Category: Biomedical Engineering Source Type: research

[Front cover]
Presents the front cover for this issue of the publication. (Source: IEEE Transactions on Biomedical Engineering)
Source: IEEE Transactions on Biomedical Engineering - July 25, 2014 Category: Biomedical Engineering Source Type: research

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(Source: IEEE Transactions on Biomedical Circuits and Systems)
Source: IEEE Transactions on Biomedical Circuits and Systems - July 25, 2014 Category: Biomedical Engineering Source Type: research

Shape-Preserving Preprocessing for Human Pulse Signals Based on Adaptive Parameter Determination
The use of the human pulse signal for medical diagnosis is a mainstay in the practice of traditional Chinese medicine. Computer processing of this signal may be used to automate diagnostic procedures and to reveal sources of information in the waveform that have been used by both eastern and western physicians for more than two millennia. A new method for preprocessing of the human pulse signal significantly improves feature extraction and classification of the waveform. Baseline distortion is first removed using the dual-tree complex wavelet transform (DT-CWT) and cubic spline interpolation, then a novel filtering method ...
Source: IEEE Transactions on Biomedical Circuits and Systems - July 25, 2014 Category: Biomedical Engineering Source Type: research

IEEE Transactions on Biomedical Circuits and Systems society information
(Source: IEEE Transactions on Biomedical Circuits and Systems)
Source: IEEE Transactions on Biomedical Circuits and Systems - July 25, 2014 Category: Biomedical Engineering Source Type: research

Noncontact Proximity Vital Sign Sensor Based on PLL for Sensitivity Enhancement
In this paper, a noncontact proximity vital sign sensor, using a phase locked loop (PLL) incorporated with voltage controlled oscillator (VCO) built-in planar type circular resonator, is proposed to enhance sensitivity in severe environments. The planar type circular resonator acts as a series feedback element of the VCO as well as a near-field receiving antenna. The frequency deviation of the VCO related to the body proximity effect ranges from 0.07 MHz/mm to 1.8 MHz/mm (6.8 mV/mm to 205 mV/mm in sensitivity) up to a distance of 50 mm, while the amount of VCO drift is about 21 MHz in the condition of 60$^{circ}{rm C}$ tem...
Source: IEEE Transactions on Biomedical Circuits and Systems - July 25, 2014 Category: Biomedical Engineering Source Type: research

A DSP for Sensing the Bladder Volume Through Afferent Neural Pathways
In this paper, we present a digital signal processor (DSP) capable of monitoring the urinary bladder volume through afferent neural pathways. The DSP carries out real-time detection and can discriminate extracellular action potentials, also known as on-the-fly spike sorting. Next, the DSP performs a decoding method to estimate either three qualitative levels of fullness or the bladder volume value, depending on the selected output mode. The proposed DSP was tested using both realistic synthetic signals with a known ground-truth, and real signals from bladder afferent nerves recorded during acute experiments with animal mod...
Source: IEEE Transactions on Biomedical Circuits and Systems - July 25, 2014 Category: Biomedical Engineering Source Type: research

A Low Power Sub-$mu$W Chemical Gilbert Cell for ISFET Differential Reaction Monitoring
This paper presents a low power current-mode method for monitoring differentially derived changes in pH from ion-sensitive field-effect transistor (ISFET) sensors, by adopting the Chemical Gilbert Cell. The fabricated system, with only a few transistors, achieves differential measurements and therefore drift minimisation of continuously recorded pH signals obtained from biochemical reactions such as DNA amplification in addition to combined gain tunability using only a single current. Experimental results are presented, demonstrating the capabilities of the front-end at a microscopic level through integration in a lab-on-c...
Source: IEEE Transactions on Biomedical Circuits and Systems - July 25, 2014 Category: Biomedical Engineering Source Type: research

High-Power CMOS Current Driver With Accurate Transconductance for Electrical Impedance Tomography
Current drivers are fundamental circuits in bioimpedance measurements including electrical impedance tomography (EIT). In the case of EIT, the current driver is required to have a large output impedance to guarantee high current accuracy over a wide range of load impedance values. This paper presents an integrated current driver which meets these requirements and is capable of delivering large sinusoidal currents to the load. The current driver employs a differential architecture and negative feedback, the latter allowing the output current to be accurately set by the ratio of the input voltage to a resistor value. The cir...
Source: IEEE Transactions on Biomedical Circuits and Systems - July 25, 2014 Category: Biomedical Engineering Source Type: research

An Efficient and Compact Compressed Sensing Microsystem for Implantable Neural Recordings
Multi-Electrode Arrays (MEA) have been widely used in neuroscience experiments. However, the reduction of their wireless transmission power consumption remains a major challenge. To resolve this challenge, an efficient on-chip signal compression method is essential. In this paper, we first introduce a signal-dependent Compressed Sensing (CS) approach that outperforms previous works in terms of compression rate and reconstruction quality. Using a publicly available database, our simulation results show that the proposed system is able to achieve a signal compression rate of 8 to 16 while guaranteeing almost perfect spike cl...
Source: IEEE Transactions on Biomedical Circuits and Systems - July 25, 2014 Category: Biomedical Engineering Source Type: research

A 2.4 GHz ULP Reconfigurable Asymmetric Transceiver for Single-Chip Wireless Neural Recording IC
This paper presents a 2.4 GHz ultra-low-power (ULP) reconfigurable asymmetric transceiver and demonstrates its application in wireless neural recording. Fabricated in $0.13~mu{rm m}$ CMOS technology, the transceiver is optimized for sensor-gateway communications within a star-shaped network, and supports both the sensor and gateway operation modes. Binary phase-shift keying (BPSK) modulation with high data rate (DR) of 1 to 8 Mbps is used in the uplink from sensor to gateway, while on-off keying (OOK) modulation with low DR of 100 kbps is adopted in the downlink. A fully integrated Class-E PA with moderate output power has...
Source: IEEE Transactions on Biomedical Circuits and Systems - July 25, 2014 Category: Biomedical Engineering Source Type: research

A Frequency Shaping Neural Recorder With 3 pF Input Capacitance and 11 Plus 4.5 Bits Dynamic Range
This paper presents a frequency-shaping (FS) neural recording architecture and its implementation in a 0.13 $mu$ m CMOS process. Compared with its conventional counterpart, the proposed architecture inherently rejects electrode offset, increases input impedance 5–10 fold, compresses neural data dynamic range (DR) by 4.5-bit, simultaneously records local field potentials (LFPs) and extracellular spikes, and is more suitable for long-term recording experiments. Measured at a 40 kHz sampling clock and ${pm} 0.6$ V supply, the recorder consumes 50 $mu$W/ch, of which 22 $,mu$W per FS amplifier, 24 $mu$ W per buffer, 4 $m...
Source: IEEE Transactions on Biomedical Circuits and Systems - July 25, 2014 Category: Biomedical Engineering Source Type: research

A Digitally Assisted, Signal Folding Neural Recording Amplifier
A novel signal folding and reconstruction scheme for neural recording applications that exploits the $1/f^{n}$ characteristics of neural signals is described in this paper. The amplified output is ‘folded’ into a predefined range of voltages by using comparison and reset circuits along with the core amplifier. After this output signal is digitized and transmitted, a reconstruction algorithm can be applied in the digital domain to recover the amplified signal from the folded waveform. This scheme enables the use of an analog-to-digital convertor with less number of bits for the same effective dynamic range. It...
Source: IEEE Transactions on Biomedical Circuits and Systems - July 25, 2014 Category: Biomedical Engineering Source Type: research

Programmable ExG Biopotential Front-End IC for Wearable Applications
This paper presents a configurable CMOS integrated circuit front-end for the recording of a wide range of biopotentials (ExG). The system offers a choice between a single-differential or double-differential recording channel topology, wide continuously adjustable gain range (37–66 dB), selectable CMOS or BJT input stages, offset compensation, differential and buffered single-ended voltage output. Measured results from a prototype manufactured in 0.35 $mu{rm m}$ CMOS technology are presented. Practical recording examples of the electrocardiogram (ECG) and electromyogram (EMG) confirm its operation. The chip consumes ...
Source: IEEE Transactions on Biomedical Circuits and Systems - July 25, 2014 Category: Biomedical Engineering Source Type: research

IEEE Transactions on Biomedical Circuits and Systems publication information
(Source: IEEE Transactions on Biomedical Circuits and Systems)
Source: IEEE Transactions on Biomedical Circuits and Systems - July 25, 2014 Category: Biomedical Engineering Source Type: research

Asynchronous Binaural Spatial Audition Sensor With 2$,times,$64$,times,$4 Channel Output
This paper proposes an integrated event-based binaural silicon cochlea system aimed at efficient spatial audition and auditory scene analysis. The cochlea chip has a matched pair of digitally-calibrated 64-stage cascaded analog second-order filter banks with 512 pulse-frequency modulated (PFM) address-event representation (AER) outputs. The quality factors (Qs) of channels are individually adjusted by local DACs. The 2P4M 0.35 um CMOS chip consumes an average power of 14 mW including its integrated microphone preamplifiers and biasing circuits. Typical speech data rates are 10 k to 100 k events per second (eps) with peak o...
Source: IEEE Transactions on Biomedical Circuits and Systems - July 25, 2014 Category: Biomedical Engineering Source Type: research

Real-Time Embedded Implementation of the Binary Mask Algorithm for Hearing Prosthetics
In this paper, we present a real-time embedded implementation of the binary masking algorithm, which has been shown to significantly improve speech-in-noise intelligibility. Our real-time implementation relies on a balance of parallel processing and hardware pipelining. We have tested and evaluated our implementation on a Spartan 3A FPGA. The measured latency was 8.5 ms . The highest measured improvement in short-time objective intelligibility was 85%. (Source: IEEE Transactions on Biomedical Circuits and Systems)
Source: IEEE Transactions on Biomedical Circuits and Systems - July 25, 2014 Category: Biomedical Engineering Source Type: research

A Real-Time Research Platform to Study Vestibular Implants With Gyroscopic Inputs in Vestibular Deficient Subjects
We describe a system based on National Instrument's CompactRIO platform that can meet this requirement and also offers floating point precision for advanced transfer functions. It is designed for acute clinical interventions, and is sufficiently powerful and flexible to serve as a development platform for evaluating prosthetic control strategies. Amplitude and pulse frequency modulation to predetermined functions or sensor inputs have been validated. The system has been connected to human patients, who each have received a modified MED-EL cochlear implant for vestibular stimulation, and patient tests are ongoing. (Source: ...
Source: IEEE Transactions on Biomedical Circuits and Systems - July 25, 2014 Category: Biomedical Engineering Source Type: research

Table of Contents
(Source: IEEE Transactions on Biomedical Circuits and Systems)
Source: IEEE Transactions on Biomedical Circuits and Systems - July 25, 2014 Category: Biomedical Engineering Source Type: research

A magnetic resonance imaging study on the articulatory and acoustic speech parameters of Malay vowels
The phonetic properties of six Malay vowels are investigated using magnetic resonance imaging (MRI) to visualize the vocal tract in order to obtain dynamic articulatory parameters during speech production. To resolve image blurring due to the tongue movement during the scanning process, a method based on active contour extraction is used to track tongue contours. The proposed method efficiently tracks tongue contours despite the partial blurring of MRI images. Consequently, the articulatory parameters that are effectively measured as tongue movement is observed, and the specific shape of the tongue and its position for all...
Source: BioMedical Engineering OnLine - July 25, 2014 Category: Biomedical Engineering Authors: Alireza ZourmandSeyed MirhassaniHua-Nong TingShaik BuxKwan NgMehmet BilgenMohd Jalaludin Source Type: research

Improving the growth of Rubrivivax gelatinosus cultivated in sewage environment.
Abstract Rubrivivax gelatinosus cultivated in wastewater environment can combine the biomass resource recycling for generating chemicals with sewage purification. However, low biomass accumulation restricts the exertion of this advantage. Thus, this paper investigated Fe(3+) advancement for biomass production in starch wastewater under light-anaerobic condition. Results showed that addition of Fe(3+) was successful in enhancing biomass production, which certainly improved the feasibility of biomass recycling in R. gelatinosus starch wastewater treatment. With optimal Fe(3+) dosage (20 mg/L), biomass production rea...
Source: Bioprocess and Biosystems Engineering - July 25, 2014 Category: Biomedical Engineering Authors: Wu P, Li JZ, Wang YL, Tong QY, Liu XS, Du C, Li N Tags: Bioprocess Biosyst Eng Source Type: research

Mathematica numerical simulation of peristaltic biophysical transport of a fractional viscoelastic fluid through an inclined cylindrical tube.
Abstract This paper studies the peristaltic transport of a viscoelastic fluid (with the fractional second-grade model) through an inclined cylindrical tube. The wall of the tube is modelled as a sinusoidal wave. The flow analysis is presented under the assumptions of long wave length and low Reynolds number. Caputo's definition of fractional derivative is used to formulate the fractional differentiation. Analytical solutions are developed for the normalized momentum equations. Expressions are also derived for the pressure, frictional force, and the relationship between the flow rate and pressure gradient. Mathemati...
Source: Computer Methods in Biomechanics and Biomedical Engineering - July 25, 2014 Category: Biomedical Engineering Authors: Tripathi D, Bég OA Tags: Comput Methods Biomech Biomed Engin Source Type: research

Lagrangian Postprocessing of Computational Hemodynamics.
Abstract Recent advances in imaging, modeling, and computing have rapidly expanded our capabilities to model hemodynamics in the large vessels (heart, arteries, and veins). This data encodes a wealth of information that is often under-utilized. Modeling (and measuring) blood flow in the large vessels typically amounts to solving for the time-varying velocity field in a region of interest. Flow in the heart and larger arteries is often complex, and velocity field data provides a starting point for investigating the hemodynamics. This data can be used to perform Lagrangian particle tracking, and other Lagrangian-base...
Source: Annals of Biomedical Engineering - July 25, 2014 Category: Biomedical Engineering Authors: Shadden SC, Arzani A Tags: Ann Biomed Eng Source Type: research

Automatic modeling of corrective prosthesis using artificial neural networks
–1Pectus excavatum is the most common deformity of the thoracic wall, occurring between 1/400 and 1/1000 births and a male to female ratio of 4:1. It is characterized by a depression in the patient chest, which demands surgical correction in a high percentage of cases [1,2]. (Source: Medical Engineering and Physics)
Source: Medical Engineering and Physics - July 25, 2014 Category: Biomedical Engineering Authors: Pedro L. Rodrigues, Nuno F. Rodrigues, ACM Pinho, Jaime C. Fonseca, Jorge Correia-Pinto, João L. Vilaça Source Type: research

Predicting flow in aortic dissection: Comparison of computational model with PC-MRI velocity measurements
Aortic dissection is a life-threatening process in which the weakened wall develops a tear, causing separation of wall layers. The dissected layers separate the original true aortic lumen and a newly created false lumen. If untreated, the condition can be fatal. Flow rate in the false lumen is a key feature for false lumen patency, which has been regarded as one of the most important predictors of adverse early and later outcomes. Detailed flow analysis in the dissected aorta may assist vascular surgeons in making treatment decisions, but computational models to simulate flow in aortic dissections often involve several ass...
Source: Medical Engineering and Physics - July 25, 2014 Category: Biomedical Engineering Authors: Z. Cheng, C. Juli, N.B. Wood, R.G.J. Gibbs, X.Y. Xu Source Type: research

Biomedical engineer looks at new applications for novel lupus drug
(University of Houston) Expanding on his work with a new drug that successfully treated lupus in mice, a biomedical engineer at the University of Houston has received a $250,000 grant to expand his research to a new version of the drug in an effort to treat a wider range of autoimmune diseases.The drug that Chandra Mohan and his collaborators at a biopharmaceutical firm are focused on targets B cells, key cells in the immune system that lead to the development of lupus. (Source: EurekAlert! - Medicine and Health)
Source: EurekAlert! - Medicine and Health - July 24, 2014 Category: Global & Universal Source Type: news

Investigation of gastric cancers in nude mice using X-ray in-line phase contrast imaging
Conclusions: This is a very preliminary feasibility study. With further researches, XILPCI could become a noninvasive method for future the early detection of gastric cancers or medical researches. (Source: BioMedical Engineering OnLine)
Source: BioMedical Engineering OnLine - July 24, 2014 Category: Biomedical Engineering Authors: Qiang TaoShuqian Luo Source Type: research

Arterial pulsatility improvement in a feedback-controlled continuous flow left ventricular assist device: An ex-vivo experimental study
Continuous flow left ventricular assist devices (CF-LVADs) reduce arterial pulsatility, which may cause long-term complications in the cardiovascular system. The aim of this study is to improve the pulsatility by driving a CF-LVAD at a varying speed, synchronous with the cardiac cycle in an ex-vivo experiment. A Micromed DeBakey pump was used as CF-LVAD. The heart was paced at 140bpm to obtain a constant cardiac cycle for each heartbeat. First, the CF-LVAD was operated at a constant speed. At varying-speed CF-LVAD assistance, the pump was driven such that the same mean pump output was generated. (Source: Medical Engineering and Physics)
Source: Medical Engineering and Physics - July 24, 2014 Category: Biomedical Engineering Authors: Selim Bozkurt, Sjoerd van Tuijl, Stephanie Schampaert, Frans N. van de Vosse, Marcel C.M. Rutten Source Type: research