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Proceedings of the 1996 Fifteenth Southern Biomedical Engineering Conference最新文献

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MR brain image analysis by distribution learning and relaxation labeling 基于分布学习和松弛标记的MR脑图像分析
Proceedings of the 1996 Fifteenth Southern Biomedical Engineering Conference Pub Date : 1996-03-29 DOI: 10.1109/SBEC.1996.493131
Y. Wang, T. Adalı, M. Freedman, S. Mun
{"title":"MR brain image analysis by distribution learning and relaxation labeling","authors":"Y. Wang, T. Adalı, M. Freedman, S. Mun","doi":"10.1109/SBEC.1996.493131","DOIUrl":"https://doi.org/10.1109/SBEC.1996.493131","url":null,"abstract":"This paper addresses the quantification and segmentation in brain tissue analysis by using MR brain scan. It is shown that this problem can be solved by distribution learning and relaxation labeling, an efficient method that may be particularly useful in quantifying and segmenting abnormal brain cases where the distribution of each tissue type may heavily overlap. The new technique utilizes suitable statistical models for both pixel and context images. The analysis is then formulated as an optimization problem of model-histogram fitting and global consistency labeling. The quantification is solved by a probabilistic self-organizing map, and the segmentation is performed through local Bayesian decisions. The experimental results show the efficient and robust performance of the new algorithm and that it outperforms conventional classification and Bayesian based approaches.","PeriodicalId":294120,"journal":{"name":"Proceedings of the 1996 Fifteenth Southern Biomedical Engineering Conference","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128082252","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: 16
Development of a hybrid leg cycling exercise technique for patients with lower-limb paresis 下肢轻瘫患者混合腿部循环运动技术的发展
Proceedings of the 1996 Fifteenth Southern Biomedical Engineering Conference Pub Date : 1996-03-29 DOI: 10.1109/SBEC.1996.493145
C. Herr, R. Glaser, T. Janssen, T. Bennett, A. Suryaprasad
{"title":"Development of a hybrid leg cycling exercise technique for patients with lower-limb paresis","authors":"C. Herr, R. Glaser, T. Janssen, T. Bennett, A. Suryaprasad","doi":"10.1109/SBEC.1996.493145","DOIUrl":"https://doi.org/10.1109/SBEC.1996.493145","url":null,"abstract":"The feasibility of a newly developed hybrid exercise technique consisting of simultaneous voluntary and electrical stimulation induced contractions (ESIC) for pedaling a leg cycle ergometer (LCE) was studied. For initial testing of this hybrid technique, ESIC were superimposed on the voluntarily contracting gluteal, quadriceps, and hamstring muscle groups of able-bodied subjects. Comparison of submaximal LCE stress tests in voluntary and hybrid modes demonstrated greater metabolic and cardiopulmonary responses at given power output levels during the hybrid technique. These results on able-bodied subjects suggest that this hybrid technique may be useful to elicit greater metabolic and cardiopulmonary responses to LCE in individuals with paretic lower-limb muscles.","PeriodicalId":294120,"journal":{"name":"Proceedings of the 1996 Fifteenth Southern Biomedical Engineering Conference","volume":"71 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130709690","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
Change detection in nonlinear biosignal processing by wavelets 非线性生物信号处理中的小波变化检测
Proceedings of the 1996 Fifteenth Southern Biomedical Engineering Conference Pub Date : 1996-03-29 DOI: 10.1109/SBEC.1996.493210
Bai-lian Li, Hsin-i Wu
{"title":"Change detection in nonlinear biosignal processing by wavelets","authors":"Bai-lian Li, Hsin-i Wu","doi":"10.1109/SBEC.1996.493210","DOIUrl":"https://doi.org/10.1109/SBEC.1996.493210","url":null,"abstract":"Biological information in the brain is carried by patterns of neural activity that are manifested in electrical fields of potential known as action potentials and in electroencephalographic (EEG) waves. Detecting changes of these waves is critical for an understanding of brain functions. Experiments suggest that most EEG and evoked potential phenomena are localized, distributed, and nonstationary. Here, the authors continue their previous work on wavelet application of biosignal processing published in recent IEEE and SPIE proceedings. They focus on exploration of some theoretical issues of change detection in nonlinear biosignal processing by wavelets and multiscale edge detection.","PeriodicalId":294120,"journal":{"name":"Proceedings of the 1996 Fifteenth Southern Biomedical Engineering Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130826706","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
Body surface Laplacian mapping from potential recordings in man 人体电位记录的体表拉普拉斯映射
Proceedings of the 1996 Fifteenth Southern Biomedical Engineering Conference Pub Date : 1996-03-29 DOI: 10.1109/SBEC.1996.493225
N. Mehdi, X. Yu, Dongsheng Wu, N. Jojic, B. Baker, P. Gosavi, A. Seyd, S. Bodak, K. Umetani, Bin He
{"title":"Body surface Laplacian mapping from potential recordings in man","authors":"N. Mehdi, X. Yu, Dongsheng Wu, N. Jojic, B. Baker, P. Gosavi, A. Seyd, S. Bodak, K. Umetani, Bin He","doi":"10.1109/SBEC.1996.493225","DOIUrl":"https://doi.org/10.1109/SBEC.1996.493225","url":null,"abstract":"Body surface Laplacian maps were studied from a set of unipolar potential data in healthy human subjects. The present results indicate that body surface Laplacian maps can be obtained with high reproducibility in the human subjects studied, and can reveal detailed information regarding the underlying ventricular conduction process.","PeriodicalId":294120,"journal":{"name":"Proceedings of the 1996 Fifteenth Southern Biomedical Engineering Conference","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130691100","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: 3
Design of a sliding linear investigative platform for analyzing lower-limb stability (SLIP-FALLS) 下肢稳定性(SLIP-FALLS)线性滑动研究平台的设计
Proceedings of the 1996 Fifteenth Southern Biomedical Engineering Conference Pub Date : 1996-03-29 DOI: 10.1109/SBEC.1996.493120
M. Purucker, C. Robinson
{"title":"Design of a sliding linear investigative platform for analyzing lower-limb stability (SLIP-FALLS)","authors":"M. Purucker, C. Robinson","doi":"10.1109/SBEC.1996.493120","DOIUrl":"https://doi.org/10.1109/SBEC.1996.493120","url":null,"abstract":"A novel device has been designed to study falling potential, the sliding linear investigative platform for analyzing lower-limb stability (SLIP-FALLS). The SLIP uses air bearing technology to manipulate friction levels between its translating surfaces. This ability to control friction makes possible new tests of postural instability, of slipping and falling, and of neurological control. Subject response can be incorporated into a control/feedback loop where coupling between the platform and the sway pattern can be adjusted. Translations or \"controlled slips\" of up to 28 cm are possible at velocities ranging from 0.05 to 50 cm/sec.","PeriodicalId":294120,"journal":{"name":"Proceedings of the 1996 Fifteenth Southern Biomedical Engineering Conference","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133638601","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: 5
Corrosion in modular femoral hip prostheses: a study of 22 retrieved implants 模块化股骨髋关节假体的腐蚀:22个回收假体的研究
Proceedings of the 1996 Fifteenth Southern Biomedical Engineering Conference Pub Date : 1996-03-29 DOI: 10.1109/SBEC.1996.493098
C. Mevellec, T. Burleigh, A. Shanbhag
{"title":"Corrosion in modular femoral hip prostheses: a study of 22 retrieved implants","authors":"C. Mevellec, T. Burleigh, A. Shanbhag","doi":"10.1109/SBEC.1996.493098","DOIUrl":"https://doi.org/10.1109/SBEC.1996.493098","url":null,"abstract":"Retrieved modular hip prostheses were examined to determine the mechanism of corrosion at the Co-Cr alloy head, Ti-alloy neck taper junction. The corrosion at the neck was consistently more severe in the posterior medial distal region, and the specimens with the highest corrosion score all had a head-neck extension. Fretting, pitting and etching-type attacks were detected, and the corrosion product was predominantly a thin layer composed of Ti, Cr and Mo. The authors' findings suggest that the corrosion is due to the cumulative effect of an acidic crevice environment and micro motion at the interface during weight bearing causing breakdown of the passive layers.","PeriodicalId":294120,"journal":{"name":"Proceedings of the 1996 Fifteenth Southern Biomedical Engineering Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131290868","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
Locomotive function in individuals with multiple sclerosis 多发性硬化症患者的机车功能
Proceedings of the 1996 Fifteenth Southern Biomedical Engineering Conference Pub Date : 1996-03-29 DOI: 10.1109/SBEC.1996.493268
D. Pringle, A.M. Seger, J. Ponichtera-Mulcare
{"title":"Locomotive function in individuals with multiple sclerosis","authors":"D. Pringle, A.M. Seger, J. Ponichtera-Mulcare","doi":"10.1109/SBEC.1996.493268","DOIUrl":"https://doi.org/10.1109/SBEC.1996.493268","url":null,"abstract":"The purpose of this study was to utilize the technique of quantitative gait analysis on individuals with multiple sclerosis (MS) to provide a more accurate representation of gait patterns than subjective clinician observation alone and then compare those patterns to reported results from normal subjects without neurological disorders. Ten subjects with MS were evaluated by clinical quantitative gait analysis. The results indicated that individuals with MS responded with a 9% decrease in cadence, 7.5% decrease in velocity, 8% decrease in stride length, 17% increase in single stance time, and 56% increase in double stance time compared to normal values. There were also diminished angular displacement values for the hip, knee, and ankle, with an increase measured in pelvic tilt. Ground reaction forces were found to be significantly different for vertical forces and anterior-posterior forces. These data appear to suggest that the technique of quantitative gait analysis can provide accurate scientific assessment of gait disturbances through evaluation of kinetic, kinematic, and temporal variables and subjects diagnosed with MS may have impaired gait patterns that may not be evident during subjective analysis alone.","PeriodicalId":294120,"journal":{"name":"Proceedings of the 1996 Fifteenth Southern Biomedical Engineering Conference","volume":"126 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131687860","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
Analysis of normal and spastic upper extremity movement utilizing a deceleration time constant 利用减速时间常数分析正常和痉挛的上肢运动
Proceedings of the 1996 Fifteenth Southern Biomedical Engineering Conference Pub Date : 1996-03-29 DOI: 10.1109/SBEC.1996.493163
C. Phillips, D. Repperger, T. Chelette
{"title":"Analysis of normal and spastic upper extremity movement utilizing a deceleration time constant","authors":"C. Phillips, D. Repperger, T. Chelette","doi":"10.1109/SBEC.1996.493163","DOIUrl":"https://doi.org/10.1109/SBEC.1996.493163","url":null,"abstract":"An engineering analysis technique, known as a phase-plane plot, is utilized to evaluate upper extremity motor performance of normal subjects and subjects with spastic activity. The bioengineering analysis technique is extended to analyze skeletal muscle performance during a manual tracking task. Specifically, we examine a redefinition of \"time constant\" with respect to its ability to distinguish between rapid commanded motor movement (C) from a rapid uncommanded motor movement (U) or \"spasm\".","PeriodicalId":294120,"journal":{"name":"Proceedings of the 1996 Fifteenth Southern Biomedical Engineering Conference","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115238629","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
Quantitative gait analysis in children with hemiplegic cerebral palsy equinus gait 偏瘫性脑瘫患儿马蹄形步态定量分析
Proceedings of the 1996 Fifteenth Southern Biomedical Engineering Conference Pub Date : 1996-03-29 DOI: 10.1109/SBEC.1996.493107
D. Pringle, M. Rodgers, M. Albert
{"title":"Quantitative gait analysis in children with hemiplegic cerebral palsy equinus gait","authors":"D. Pringle, M. Rodgers, M. Albert","doi":"10.1109/SBEC.1996.493107","DOIUrl":"https://doi.org/10.1109/SBEC.1996.493107","url":null,"abstract":"The effects of fixed ankle foot orthosis (AFO) on the contralateral (unaffected) limb of 20 children with spastic cerebral palsy (CP) were investigated. 3-D motion analysis was used to evaluate gait with and without the AFO. Results for the contralateral limb indicated that knee range of motion decreased 14% and angle at toe-off was more extended, decreased 18%, with the AFO. There was also a concurrent increase of 11% in the anterior forces. No significant differences were measured for other ground reaction forces. Significant differences were noted for lower-leg EMG activity with the gastroc-soleus muscle increasing in magnitude. These results appear to suggest that the AFO enhanced knee action during the swing phase of the gait cycle and allowed for greater ankle stability at push-off enabling more force to be exerted. This in turn increased stride length and velocity which improved the gait pattern toward a more normalized cycle.","PeriodicalId":294120,"journal":{"name":"Proceedings of the 1996 Fifteenth Southern Biomedical Engineering Conference","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115357018","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
Body surface estimation: a critical evaluation 体表估计:一个关键的评估
Proceedings of the 1996 Fifteenth Southern Biomedical Engineering Conference Pub Date : 1996-03-29 DOI: 10.1109/SBEC.1996.493259
S. Dubin, S. Zietz
{"title":"Body surface estimation: a critical evaluation","authors":"S. Dubin, S. Zietz","doi":"10.1109/SBEC.1996.493259","DOIUrl":"https://doi.org/10.1109/SBEC.1996.493259","url":null,"abstract":"Estimates of body surface area (BSA) are widely used in intensive care, cancer chemotherapy, anesthesia, hemodialysis and other critically important medical computations. Although formulas have been proposed, virtually all BSA estimates use a formula promulgated in 1916 based on a sample of twelve possibly atypical subjects. The inclusion of a computation into a computer program imparts the impression of accuracy which is not always justified. The authors have attempted to examine and compare some direct measurement methods and estimation formulas used for BSA particularly with respect to inter-method consistency and correlation with a variety of published data.","PeriodicalId":294120,"journal":{"name":"Proceedings of the 1996 Fifteenth Southern Biomedical Engineering Conference","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124282450","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
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