Proceedings of the 19th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. 'Magnificent Milestones and Emerging Opportunities in Medical Engineering' (Cat. No.97CH36136)
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Pulse shaping for localized magnetic resonance tagging
Proceedings of the 19th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. 'Magnificent Milestones and Emerging Opportunities in Medical Engineering' (Cat. No.97CH36136) - - Trang 2280-2283 vol.3
Magnetic resonance tagging is usually achieved by means of a train of non-selective radio-frequency pulses separated by gradient pulses. Thus, the modulation of the M/sub 2/ magnetization component expands all over the imaging plane. It has been proposed that the use of selective excitation pulses may limit the modulation only to regions of interest, thus preserving anatomical data in the rest of ...... hiện toàn bộ
#Pulse shaping methods #Magnetic resonance #Tagging #Radio frequency #Magnetization #Magnetic resonance imaging #Pulse modulation #Anatomy #Magnetic modulators #Magnetic separation
Acceleration of learning in hybrid neural networks: A novel approach for the design of brain chaosmakers
Proceedings of the 19th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. 'Magnificent Milestones and Emerging Opportunities in Medical Engineering' (Cat. No.97CH36136) - Tập 1 - Trang 687-690 vol.1
Epileptic seizures correspond to episodes of increased rhythmicity of the normally chaotic activity in biological neural networks. We propose to use hybrid neural networks where artificial neural networks are used to control the biological neural networks by learning their different states. The learning is dramatically accelerated when using a conjugate gradient method in conjunction with the Flet...... hiện toàn bộ
#Acceleration #Intelligent networks #Biological neural networks #Chaos #Artificial neural networks #Character generation #Epilepsy #Optimization methods #Voltage #Biomedical engineering
Effect of segmented polyurethane coating on thrombus regulated with pulsatile shear flow
Proceedings of the 19th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. 'Magnificent Milestones and Emerging Opportunities in Medical Engineering' (Cat. No.97CH36136) - Tập 1 - Trang 492-495 vol.1
The effect of segmented polyurethane coating on thrombus formation was quantitatively studied under a shear field in vitro. Segmented polyurethane, has been applied to coat the inner surface in blood pumps in artificial hearts. Here, the Couette-type of shear rate was applied to canine blood between concave and the convex cones. The material of the cones was varied: polymethyl-methacrylate, polyvi...... hiện toàn bộ
#Coatings #Coagulation #Testing #Blood flow #Plugs #Time measurement #Torque measurement #Biomedical engineering #Cardiology #Surgery
Analysis of the activation propagation on both ventricles using tagged MRI
Proceedings of the 19th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. 'Magnificent Milestones and Emerging Opportunities in Medical Engineering' (Cat. No.97CH36136) - Tập 1 - Trang 307-310 vol.1
MRI tagging created new opportunities for motion analysis within the body. With tagged cardiac MRI, detailed motion analysis has been previously shown; e.g. measurements of local strain of the heart could be obtained easily for normal and pathological hearts. In this study, we calculate the activation times using the local time-strain relationship and compute the propagation velocity of the activa...... hiện toàn bộ
#Magnetic resonance imaging #Heart #Capacitive sensors #Motion analysis #Tagging #Mathematical model #Biomedical engineering #Biomedical measurements #Motion measurement #Strain measurement
Freezing curve based monitoring to quickly evaluate the viability of the biological materials subject to freezing and rewarming
Proceedings of the 19th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. 'Magnificent Milestones and Emerging Opportunities in Medical Engineering' (Cat. No.97CH36136) - Tập 4 - Trang 3308-3310 vol.4
A new technique based on freezing curve monitoring to quickly evaluate the viability of the biological materials subject to freezing or rewarming was established. A practical integrated device was fabricated which is simple in structure and cheap in price. Preliminary freezing experiments on the fresh fish blood demonstrated that minor changes in a biological material due to freezing or warming in...... hiện toàn bộ
#Monitoring #Biological materials #Cells (biology) #Cooling #Biochemical analysis #Magnetic analysis #Blood #Temperature #Fungi #Biological systems
Quantification of transmural differences in myocardial function with MRI tagging
Proceedings of the 19th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. 'Magnificent Milestones and Emerging Opportunities in Medical Engineering' (Cat. No.97CH36136) - Tập 1 - Trang 95-97 vol.1
Many cardiac diseases cause transmural differences in myofiber function. With the Magnetic Resonance Imaging Tagging technique a grid of magnetic tags was attached to the heart. Using a model of cardiac mechanics the motion of these tags was analyzed to deduct the transmural gradient or myofiber shortening. In normal, young healthy subjects (n=9), the transmural difference in myofiber shortening v...... hiện toàn bộ
#Myocardium #Magnetic resonance imaging #Tagging #Heart #Cardiac disease #Magnetic analysis #Image sequence analysis #Art #Cardiology #Surgery
Algorithm for detection of uterine contractions from electrohysterogram
Proceedings of the 19th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. 'Magnificent Milestones and Emerging Opportunities in Medical Engineering' (Cat. No.97CH36136) - - Trang 2161-2164 vol.3
At present, the most widespread method of monitoring uterine contractions activity during pregnancy and labour is the external tocography method. This mechanical method, however, has limited value resulting from its low accuracy and sensibility. Recent progress in new techniques of perinatal monitoring requires a more precise method of monitoring uterine activity. The most promising seems to be el...... hiện toàn bộ
#Abdomen #Biomedical monitoring #Pregnancy #Pressure measurement #Frequency #Signal analysis #Signal processing algorithms #Electrodes #Signal processing #Patient monitoring
Functional electrical therapy systems: neuroprostheses for life-like reach and grasp
Proceedings of the 19th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. 'Magnificent Milestones and Emerging Opportunities in Medical Engineering' (Cat. No.97CH36136) - Tập 2 - Trang 1321-1324 vol.2
A programmable multi-channel neuroprosthesis for functional electrical therapy was developed. This research follows the neurorehabilitation studies indicating that the provision of life-like reaching and grasping in stroke subjects is essential for their faster and more effective recovery. The designed 16-channel neuroprosthesis delivers charge-balanced impulses, and controls the pulse width, freq...... hiện toàn bộ
#Medical treatment #Space vector pulse width modulation #Frequency #Machine learning #Communication system control #Flash memory #Computer interfaces #Optical computing #Communication channels #Optical fiber communication
New insights into the relationship between Poincare plot geometry and linear measures of heart rate variability
Proceedings of the 19th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. 'Magnificent Milestones and Emerging Opportunities in Medical Engineering' (Cat. No.97CH36136) - Tập 1 - Trang 526-529 vol.1
The Poincare plot is an emerging Heart Rate Variability (HRV) analysis technique, the geometry of which has been shown to distinguish between healthy and unhealthy subjects in clinical settings. The Poincare plot is able to display nonlinear aspects of the interval sequence and is therefore of interest in characterizing the nonlinear aspects of HRV. The problem is, how do we quantitatively charact...... hiện toàn bộ
#Geometry #Heart rate #Heart rate variability #Measurement standards #Autocorrelation #Ear #Electric variables measurement #Cardiology #Hospitals #Displays
Cardiac risk telemonitoring
Proceedings of the 19th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. 'Magnificent Milestones and Emerging Opportunities in Medical Engineering' (Cat. No.97CH36136) - Tập 4 - Trang 3962-3965 vol.4
Utilization of advanced information, telecommunication and implant technology for cardiac risk stratification and management is one of the greatest challenges for modern health care provision. Sudden cardiac death is the major contributor to overall cardiovascular mortality with approximately 60% of all coronary heart disease fatalities occurring annually. Although some high-risk patient groups ha...... hiện toàn bộ
#Implants #Technology management #Risk management #Medical services #Cardiology #Cardiac disease #Sensitivity and specificity #Pacemakers #Telemetry #Surveillance
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