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Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society Volume 13: 1991最新文献

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Noise-induced Metastability In A Model Of Respiratory Oscillation 呼吸振荡模型中的噪声诱导亚稳态
Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society Volume 13: 1991 Pub Date : 1991-10-31 DOI: 10.1109/IEMBS.1991.684955
J. Zbilut, F. Eldridge, C. Webber
{"title":"Noise-induced Metastability In A Model Of Respiratory Oscillation","authors":"J. Zbilut, F. Eldridge, C. Webber","doi":"10.1109/IEMBS.1991.684955","DOIUrl":"https://doi.org/10.1109/IEMBS.1991.684955","url":null,"abstract":"Considerable attention has been devoted to elucidating chaotic dynamics of biologic systems. Whether true deterministic chaos is frequent in such systems is questionable. Nonetheless, nonlinear dynamics provides a tool for understanding noisy phenomena. We demonstrate this in a model of respiration: the Bonhoeffer-van der Pol (BVP) equations have been modified and solved with varying degrees of additive random noise. The results give the appearance of true chaotic dynamics. We explain these findings in terms of transiency and metastability.","PeriodicalId":297811,"journal":{"name":"Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society Volume 13: 1991","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128622479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
A Multistrategy Approach To Epileptic Focus Localization 癫痫病灶定位的多策略方法
Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society Volume 13: 1991 Pub Date : 1991-10-31 DOI: 10.1109/IEMBS.1991.684016
P. G. de Oliveira, J. Cunha, T.O. d Silva, A. da Silva
{"title":"A Multistrategy Approach To Epileptic Focus Localization","authors":"P. G. de Oliveira, J. Cunha, T.O. d Silva, A. da Silva","doi":"10.1109/IEMBS.1991.684016","DOIUrl":"https://doi.org/10.1109/IEMBS.1991.684016","url":null,"abstract":"In this paper, an interactive software tool for epileptiform spike detection and focus localization is presented. The clinician may adjust and validate the automatic spike detector as well as combine and integrate a set of independent techniques to reinforce each other in order to achieve a reliable focal indication.","PeriodicalId":297811,"journal":{"name":"Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society Volume 13: 1991","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128677726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Ventilation Control: From High-tech To High-tech Low Cost 通风控制:从高科技到高科技低成本
Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society Volume 13: 1991 Pub Date : 1991-10-31 DOI: 10.1109/IEMBS.1991.684730
B. Rybak
{"title":"Ventilation Control: From High-tech To High-tech Low Cost","authors":"B. Rybak","doi":"10.1109/IEMBS.1991.684730","DOIUrl":"https://doi.org/10.1109/IEMBS.1991.684730","url":null,"abstract":"","PeriodicalId":297811,"journal":{"name":"Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society Volume 13: 1991","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128718593","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Computerized Modelling Of Photon Migration In Tissue 组织中光子迁移的计算机模拟
Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society Volume 13: 1991 Pub Date : 1991-10-31 DOI: 10.1109/IEMBS.1991.683835
Conway Yee, G. Herman
{"title":"Computerized Modelling Of Photon Migration In Tissue","authors":"Conway Yee, G. Herman","doi":"10.1109/IEMBS.1991.683835","DOIUrl":"https://doi.org/10.1109/IEMBS.1991.683835","url":null,"abstract":"In this paper we present work that is part of a project to develop a method for reconstructing the three-dimensional distribution of some medically relevant physical parameters in the inte.rior of the human body from photon migration imaging (F'MI) data. In this imaging technique, light in the infrared or near-infrared region is pulsed into tissue. Escaping light is detected at various points in a time-resolved manner; these data contain information about the structum through which the light has passed. Our proposed method for recovering localized three-dimensional information from such data includes computerized modelling of the migration of light photons through tissue. Here we present one approach to such modelling.","PeriodicalId":297811,"journal":{"name":"Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society Volume 13: 1991","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128734913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Decomposition of heart rate variability by adaptive filtering for estimation of cardiac vagal tone 心率变异性的自适应滤波分解估计心脏迷走神经张力
Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society Volume 13: 1991 Pub Date : 1991-10-31 DOI: 10.18419/OPUS-7207
K. Jan, J. Nagel, B. Hurwitz, N. Schneiderman
{"title":"Decomposition of heart rate variability by adaptive filtering for estimation of cardiac vagal tone","authors":"K. Jan, J. Nagel, B. Hurwitz, N. Schneiderman","doi":"10.18419/OPUS-7207","DOIUrl":"https://doi.org/10.18419/OPUS-7207","url":null,"abstract":"Heart rate fluctuations resulting from respiration and otber influences upon the cardiovascu1ar system are encoded into the patterns of heart rate variability (HRV). The fluctuations due to respiration are called respiratory sinus arrhythmia (RSA). Since RSA is primarily mediated through the autonomic nervous system (ANS), it is of interest to separate RSA from other influences to assess the underlying ANS function. On the other hand, the RSA may obscure heart rate responses to external manipulations in psychophysiological tests. A method of partitioning the HRV signal which can provide quantitative estimate of RSA as well as true heart rate responses without respiratory disturbances for psychophysiological studies is developed. The analysis of HRV signal is performed using an adaptive filtering system. With the simultaneously recorded respiration signal as a reference input, the HRV signal can be separated into two components, RSA and fluctuation due to other influences. After the separation, the variance of RSA, an estimate of cardiac vagal tone (ECVf), is readily obtained. The performance of the system was evaluated using artificial test signals as well as real HR V data. As a time domain approach, the method is simple, fast and robust.","PeriodicalId":297811,"journal":{"name":"Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society Volume 13: 1991","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129841578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Action Potential Stimulation and Recording With a Portable Microcomputer 动作电位刺激与便携式微机记录
Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society Volume 13: 1991 Pub Date : 1991-10-31 DOI: 10.1109/IEMBS.1991.684718
D. Craig, J. W. O'Brien, C. Purut, P.K. Smith
{"title":"Action Potential Stimulation and Recording With a Portable Microcomputer","authors":"D. Craig, J. W. O'Brien, C. Purut, P.K. Smith","doi":"10.1109/IEMBS.1991.684718","DOIUrl":"https://doi.org/10.1109/IEMBS.1991.684718","url":null,"abstract":"","PeriodicalId":297811,"journal":{"name":"Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society Volume 13: 1991","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130388239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Pennsylvania State University Roller Screw Electric Total Artificial Heart: 205 Days Survival In The Calf 宾夕法尼亚州立大学的滚轴螺旋电动全人工心脏:在小牛体内存活205天
Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society Volume 13: 1991 Pub Date : 1991-10-31 DOI: 10.1109/IEMBS.1991.684905
G. Rosenberg, W. Pierce, A. Snyder, W. Weiss, T. Lamson
{"title":"The Pennsylvania State University Roller Screw Electric Total Artificial Heart: 205 Days Survival In The Calf","authors":"G. Rosenberg, W. Pierce, A. Snyder, W. Weiss, T. Lamson","doi":"10.1109/IEMBS.1991.684905","DOIUrl":"https://doi.org/10.1109/IEMBS.1991.684905","url":null,"abstract":"A 100 cc size roller screw electric total artificial heart has been implanted in IO animals at The Pennsylvania State University; four of those animals have survived in excess of 100 days, with one animal living 205 days. The 205 day animal. Agnes, had a preoperative weight of 103 kg and gained 73 kgs over the 205 day implant duration. The calf was under automatic electronic control the entire duration of the experiment, and tolerated weekly exercise very well. The cause of death in the animal was corrosion debris lodging between the rotor and stator; this corrosion debris was corrosion generated by the electric motor stack. Subsequent experiments utilize a coated stack to eliminate corrosion.","PeriodicalId":297811,"journal":{"name":"Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society Volume 13: 1991","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130388423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Extension Of Generalized Delta Rule To Adapt Sigmoid Functions 广义Delta法则在Sigmoid函数中的推广
Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society Volume 13: 1991 Pub Date : 1991-10-31 DOI: 10.1109/IEMBS.1991.684507
A. Sperduti, A. Starita
{"title":"Extension Of Generalized Delta Rule To Adapt Sigmoid Functions","authors":"A. Sperduti, A. Starita","doi":"10.1109/IEMBS.1991.684507","DOIUrl":"https://doi.org/10.1109/IEMBS.1991.684507","url":null,"abstract":"In this paper an extension of the generalized delta rule to adapt sigmoid functions is presented. The proposed learning procedure retains the standard generalized delta rule for weights changes and introduces changes of the sigmoid functions parameters in the same fashion. The adaptation of the nonlinearities so introduced allows to expect an acceleration of the learning and a better adaptation to the input pattern distribution.","PeriodicalId":297811,"journal":{"name":"Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society Volume 13: 1991","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127020454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Energy Losses In The Penn State Electric Ventricular Assist Device 宾夕法尼亚州立大学心室辅助装置的能量损失
Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society Volume 13: 1991 Pub Date : 1991-10-31 DOI: 10.1109/IEMBS.1991.684906
M.A. Rawhouser, J. Gardner, D. Geselowitz
{"title":"Energy Losses In The Penn State Electric Ventricular Assist Device","authors":"M.A. Rawhouser, J. Gardner, D. Geselowitz","doi":"10.1109/IEMBS.1991.684906","DOIUrl":"https://doi.org/10.1109/IEMBS.1991.684906","url":null,"abstract":"The objective of this study was to investigate and quantify electronic and mechanical losses in the Penn State Electric Ventricular Assist Device (EVAD) and to improve the mathematical model of the EVAD. Previous studies of the Electric Total Artificial Heart (TAH) estimated power distribution in the device[l]. This study involved more detailed investigation of the motor electronics. Results show that elecrronic losses account for approximately 20% of the energy delivered to the motor during each stroke and that other motor losses account for another 55% of the total. The value of effective armature resistance was shown to be dependent on pulse width duty cycle.","PeriodicalId":297811,"journal":{"name":"Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society Volume 13: 1991","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123995566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Prospects For Assesment Of The Effects Of Electrical Injury By Magnetic Resonance 磁共振评价电损伤效应的展望
Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society Volume 13: 1991 Pub Date : 1991-10-31 DOI: 10.1109/IEMBS.1991.684312
G. Karczmar, J. River, L. River, R.C. Lee
{"title":"Prospects For Assesment Of The Effects Of Electrical Injury By Magnetic Resonance","authors":"G. Karczmar, J. River, L. River, R.C. Lee","doi":"10.1109/IEMBS.1991.684312","DOIUrl":"https://doi.org/10.1109/IEMBS.1991.684312","url":null,"abstract":"Applications of Magnetic Resonance (MR) methods to the study of effects of electrical shock on tissue will be discussed. Potential clinical application of MR methods to diagnosis and treatment of electrical injury will be considered. imaging, MR imaging of blood flow, Phosphorous-3 1 (31P) MR spectroscopy, and Sodium MR imaging will be discussed in detail.","PeriodicalId":297811,"journal":{"name":"Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society Volume 13: 1991","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124247157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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