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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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Biochemical Systems Theory Applied To The Human Red-blood Cell 生物化学系统理论在人体红细胞中的应用
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.1991.684629
T. Ni, M. Savageau
{"title":"Biochemical Systems Theory Applied To The Human Red-blood Cell","authors":"T. Ni, M. Savageau","doi":"10.1109/IEMBS.1991.684629","DOIUrl":"https://doi.org/10.1109/IEMBS.1991.684629","url":null,"abstract":"The results reported in this paper show that the current model of the red cell exhibits a self-consistent and stable steady state. However, the model is not very robust; the high parameter sensitivities associated with the synthesis of NADP and glutathione suggest that this portion of the model is illconditioned. Signals propagated from independent to dependent variables are attenuated in some cases and amplified in others. These influences exhibit large values, both negative as well as positive. The average influence on any given flux can be as high as 2/3, which is 27-fold greater than the value of 1/41 predicted on the basis of summation relationships [Kacser and Burns, 19811 and supports criticisms of this approach based on theoretical grounds [Savageau and Sorribas, 19891. The accuracy with which the theory predicts responses to a 10% variation of the independent variables is within 0.5% on the average.","PeriodicalId":297811,"journal":{"name":"Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society Volume 13: 1991","volume":"17 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":"123735331","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
Anthropomorphic Cardiac Ultrasound Phantom With Coronary Arteries 冠状动脉拟人化心脏超声幻象
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.1991.683879
S.W. Smith, T. Miller, J. Kisslo
{"title":"Anthropomorphic Cardiac Ultrasound Phantom With Coronary Arteries","authors":"S.W. Smith, T. Miller, J. Kisslo","doi":"10.1109/IEMBS.1991.683879","DOIUrl":"https://doi.org/10.1109/IEMBS.1991.683879","url":null,"abstract":"The cardiac anthropomorphic ultrasound phantom has been improved by the addition of two new features. An aorta with a bifurcation has been molded into the torso via a \"lost wax\" procedure. B-scan images of contrast medium and color-flaw Doppler images show flow patterns typical of peripheral vessels in Doppler phantoms. In addition, three coronary arteries have been attached to the externd surface of the ventricle. Contrast injection of aerated water in the coronary arteries are easily visualized in real-time Bscan images.","PeriodicalId":297811,"journal":{"name":"Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society Volume 13: 1991","volume":"2 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":"121231536","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 Cyclostationary Least Mean Squares Algorithm For Discrimination Of Ventricular Tachycardia From Sinus Rhythm 区分室性心动过速与窦性心律的周期平稳最小均二乘法
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.1991.684170
C. Finelli, J. Jenkins
{"title":"A Cyclostationary Least Mean Squares Algorithm For Discrimination Of Ventricular Tachycardia From Sinus Rhythm","authors":"C. Finelli, J. Jenkins","doi":"10.1109/IEMBS.1991.684170","DOIUrl":"https://doi.org/10.1109/IEMBS.1991.684170","url":null,"abstract":"A simple real-time algorithm is presented which accurately predicts a single beat of either sinus rhythm (SR) or ventricular tachycardia (VT) and detects a change from one rhythm to the other. The proposed algorithm learns from previous beats, so the prediction error decreases with time, thus accurately predicting the electrocardiogram. The algorithm detects changes in morphology (such as occurs during the spontaneous onset of VT during SR) by monitoring sudden increases in prediction error and is successful in all cases.","PeriodicalId":297811,"journal":{"name":"Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society Volume 13: 1991","volume":"87 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":"114556986","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: 7
Muscle Sound Frequency Analysis From Fast And Slow Twitch Muscle 快、慢抽搐肌的肌肉声频分析
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.1991.684278
D. Mealing, P. Mccarthy
{"title":"Muscle Sound Frequency Analysis From Fast And Slow Twitch Muscle","authors":"D. Mealing, P. Mccarthy","doi":"10.1109/IEMBS.1991.684278","DOIUrl":"https://doi.org/10.1109/IEMBS.1991.684278","url":null,"abstract":"Muscle sounds were recorded from human orbicularis oris and soleus muscles from 5 healthy subjects during isometric contraction. Frequency analysis of the signals revealed distinct power spectra for each muscle type. The peak frequency for soleus was 10.8 +/- 3.1 and for orbicularis oris was 22 +/- 5 Hz. The results indicate that muscle sound power spectra may reflect fibre type composition and/or motor unit firing frequency .","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":"116206030","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: 14
EEG Mapping Of Three Alpha-subbands In Healthy And Depressive Subjects Under Music Test 音乐测试下健康与抑郁受试者三个α -亚带的脑电图映射
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.1991.684412
E. Mikhailova
{"title":"EEG Mapping Of Three Alpha-subbands In Healthy And Depressive Subjects Under Music Test","authors":"E. Mikhailova","doi":"10.1109/IEMBS.1991.684412","DOIUrl":"https://doi.org/10.1109/IEMBS.1991.684412","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":"43 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":"116283620","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
Three Dimensional Ultrasonic Micrometer For Use In Cardiovascular Research 三维超声千分尺在心血管研究中的应用
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.1991.684616
W. Smith, I. Vesely
{"title":"Three Dimensional Ultrasonic Micrometer For Use In Cardiovascular Research","authors":"W. Smith, I. Vesely","doi":"10.1109/IEMBS.1991.684616","DOIUrl":"https://doi.org/10.1109/IEMBS.1991.684616","url":null,"abstract":"Obtaining dimensional or coordinate information of moving biological struc~ often presents technical problems. The need for making high resolution, non-destructive measmments of tissues functioning in vivo leave few tools available to the researcher. We are currently testing a three dimensional ultrasonic micrometer that will be used to provide morphometxic data on the functioning aortic valve in an isolated porcine heart model. Preliminary results indicate that a theoretical 62.5 pm spatial resolution is achievable, within a sample volume 8 cm on a side, at rates in excess of 5 kHz.","PeriodicalId":297811,"journal":{"name":"Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society Volume 13: 1991","volume":"30 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":"121596403","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: 6
Body Surface Laplacian Mapping In Man 人体体表拉普拉斯映射
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.1991.684192
Bin He, R. Cohen
{"title":"Body Surface Laplacian Mapping In Man","authors":"Bin He, R. Cohen","doi":"10.1109/IEMBS.1991.684192","DOIUrl":"https://doi.org/10.1109/IEMBS.1991.684192","url":null,"abstract":"We have developed a new approach to improve the spatial resolution of body surface mapping of cardiac electrical activity by measuring the surface Laplacian of the body surface potential. A high resolution body surface Laplacian mapping system has been developed and successfully applied to study the Laplacian maps of noxmal human subjects. Both simulation and experimental studies have shown that the body surface Laplacian mapping provides much better spatial resolution than potential mapping. This may enable Laplacian mapping to identify from the body surface spatially separated myocardial events, and to play a signifcant role in quantitative cardiac electrophysiology. superior spatial resolution in identifying multiple sources in the heart [SI. In the present study, we have developed a special bipolar 'Laplacian' electrode to sense the surface Laplacian and a high resolution mapping system to measure the BSLM. The developed techniques have been successfully applied to map the cardiac electrical events in normal human subjects and will be described in this paper.","PeriodicalId":297811,"journal":{"name":"Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society Volume 13: 1991","volume":"48 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":"121678555","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: 19
Correlation Of Quantitative MRI Parameters With Mammographic Pattern: Risk Of Breast Cancer 定量MRI参数与乳房x线摄影模式的相关性:乳腺癌的风险
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.1991.683863
M. Bronskill, M. Yaffe, N. Boyd, C. Poon, J. Byng
{"title":"Correlation Of Quantitative MRI Parameters With Mammographic Pattern: Risk Of Breast Cancer","authors":"M. Bronskill, M. Yaffe, N. Boyd, C. Poon, J. Byng","doi":"10.1109/IEMBS.1991.683863","DOIUrl":"https://doi.org/10.1109/IEMBS.1991.683863","url":null,"abstract":"Improved quantitative magnetic resonance (MR) imaging techniques have been developed and used to measure relative water content, T1 and T2 relaxation times for breast tissue. Two groups of women with mammographic parenchymal appearance associated with high (Dy, n=ll) and low (Nl, n=l 1) risk of breast cancer were measured. The two groups have significantly different average relative water content (pc0.001) and average T1 (pcO.0001). Pixel histograms of T2 values show marked differences between the two groups which can be characterized with a fourth moment parameter. Additional measures of texture such as fractal dimension and fraction of dysplastic tissue have been used to analyze the x-ray mammograms and compare with the MR parameters.","PeriodicalId":297811,"journal":{"name":"Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society Volume 13: 1991","volume":"18 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":"114759787","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
Evidence For Electroporation Mediated Cellular Injury In Vivo 体内电穿孔介导的细胞损伤证据
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.1991.684310
L. River, R.C. Lee, F. Pan
{"title":"Evidence For Electroporation Mediated Cellular Injury In Vivo","authors":"L. River, R.C. Lee, F. Pan","doi":"10.1109/IEMBS.1991.684310","DOIUrl":"https://doi.org/10.1109/IEMBS.1991.684310","url":null,"abstract":"Previous in vitro experiments in our laboratory have demonstrated the formation of permanent pores in skeletal muscle cells following exposure to electric fields. We used a rat island muscle flap to study post-shock membrane impedance, and an intact rat hind limb flexor muscle for post-shock pathological studies. Muscle membrane impedance, a measure of membrane integrity, fell to 50% of initial values following a series of 60 150 V/cm direct current pulses of four milliseconds in duration. Histological preparations of the flexor muscle showed significant damage to the muscle architecture following 5 seconds of exposure to a 60 V/cm laternating current electric field. No significant change in temperature was seen in either set of experiments.","PeriodicalId":297811,"journal":{"name":"Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society Volume 13: 1991","volume":"25 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":"114776426","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
Solid Model Prediction Of The Range Of Motion Of The Wrist Following A Proximal Row Carpectomy 腕部近端行腕部切除术后腕关节活动度的实体模型预测
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.1991.684843
D. Justin, S. Wurster, J. Werntz, M. Dale, J. Llewellyn
{"title":"Solid Model Prediction Of The Range Of Motion Of The Wrist Following A Proximal Row Carpectomy","authors":"D. Justin, S. Wurster, J. Werntz, M. Dale, J. Llewellyn","doi":"10.1109/IEMBS.1991.684843","DOIUrl":"https://doi.org/10.1109/IEMBS.1991.684843","url":null,"abstract":"In this paper, 3-D computer solid models of a complete carpus are generated from CT scans and used to predict the kinematics of the wrist after a proximal row carpectomy. The initial data for this study was obtained through CT scans of a fresh cadaver wrist specimen scanned in ten different positions. The wrist was scanned at 1 mm intervals through seven different positions from 80\" extension to 70\" flexion, and in three positions from ulnar to radial deviation. The digital CT data was converted to profile sections through the use of an edge following algorithm [1,2]. The profile information was then analyzed by two teams. Each team independently built solid models of the wrist in all ten positions using two different software packages. The volume, principal axes, and three principal moments of inertia of each of the eight bones of the wrist were determined from the computer models using two software techniques. Reconstruction of the wrist bones from digital data to computer generated, 3-D models produced an average relative difference of 3.1% for volume, 6.7% for the first principal moment of inertia, 6.5% for the second principal moment of inertia, and 6.6% for the third principal moment of inertia between the two methods. The computer models predicted that, with a proximal row carpectomy, the maximum range of motion as determined by bone configuration is 64' of extension (80% normal), and 65' of flexion (94% normal).","PeriodicalId":297811,"journal":{"name":"Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society Volume 13: 1991","volume":"6 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":"124300672","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
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