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

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Mechanical properties of apatite formed by acid-base reactions at 37.4/spl deg/C 在37.4℃/spl℃下酸碱反应形成的磷灰石的力学性能
Proceedings of the 1996 Fifteenth Southern Biomedical Engineering Conference Pub Date : 1996-03-29 DOI: 10.1109/SBEC.1996.493101
R. Martin, P. Brown
{"title":"Mechanical properties of apatite formed by acid-base reactions at 37.4/spl deg/C","authors":"R. Martin, P. Brown","doi":"10.1109/SBEC.1996.493101","DOIUrl":"https://doi.org/10.1109/SBEC.1996.493101","url":null,"abstract":"The mechanical properties of monolithic hydroxyapatite were related to porosity, microstructure and composition. The ultimate strength has a logarithmic relationship with the porosity between 4 and 70 vol% pores. The modulus of elasticity is approximately 6-7 GPa for hydroxyapatite and 4-5 GPa for 3.66 wt% carbonate hydroxyapatite.","PeriodicalId":294120,"journal":{"name":"Proceedings of the 1996 Fifteenth Southern Biomedical Engineering Conference","volume":"16 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":"114990214","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
Development of a hybrid strength training technique for paretic lower-limb muscles 下肢麻痹性肌肉混合力量训练技术的发展
Proceedings of the 1996 Fifteenth Southern Biomedical Engineering Conference Pub Date : 1996-03-29 DOI: 10.1109/SBEC.1996.493110
T. Bennett, R. Glaser, T. Janssen, W. Couch, C.J. Herr, J. Almeyda, S.H. Petrofsky, P. Akuthota
{"title":"Development of a hybrid strength training technique for paretic lower-limb muscles","authors":"T. Bennett, R. Glaser, T. Janssen, W. Couch, C.J. Herr, J. Almeyda, S.H. Petrofsky, P. Akuthota","doi":"10.1109/SBEC.1996.493110","DOIUrl":"https://doi.org/10.1109/SBEC.1996.493110","url":null,"abstract":"A hybrid resistance exercise technique for strength training of patients with lower-limb paresis was developed. It consists of electrical stimulation-induced contractions (ESIC) superimposed on voluntary contractions to increase recruitment of motor units and the functional load capability of paretic quadriceps and hamstring muscle groups. The feasibility of this hybrid exercise technique was demonstrated in 10 able-bodied subjects during submaximal isometric contractions by eliciting greater forces than the voluntary contractions at given efforts. Mean (/spl plusmn/SE) submaximal voluntary contraction forces (46.4% maximum voluntary contraction forces) for the quadriceps and hamstrings, respectively, were 206.0/spl plusmn/18.0 N and 115.9/spl plusmn/12.7 N, whereas the hybrid forces were 282.7/spl plusmn/30.3 N and 126.1/spl plusmn/12.9 N at ES current levels of 55.6/spl plusmn/7.9 mA and 51.5/spl plusmn/5.7 mA. This represented a 37.2% and an 8.8% increase over the voluntary effort for these muscle groups. Since this hybrid technique recruits additional muscle fibers for stronger contractions, the greater force overload may be more effective for the strength training of patients with lower-limb paresis.","PeriodicalId":294120,"journal":{"name":"Proceedings of the 1996 Fifteenth Southern Biomedical Engineering Conference","volume":"16 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":"115110308","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
Mammographic image segmentation using combined morphological filtering and contextual Bayesian labeling 结合形态学滤波和上下文贝叶斯标记的乳房x线图像分割
Proceedings of the 1996 Fifteenth Southern Biomedical Engineering Conference Pub Date : 1996-03-29 DOI: 10.1109/SBEC.1996.493263
H. Li, M. Freedman, Y. Wang, S. Lo, S. Mun
{"title":"Mammographic image segmentation using combined morphological filtering and contextual Bayesian labeling","authors":"H. Li, M. Freedman, Y. Wang, S. Lo, S. Mun","doi":"10.1109/SBEC.1996.493263","DOIUrl":"https://doi.org/10.1109/SBEC.1996.493263","url":null,"abstract":"The objective of this study is to develop an efficient method to highlight the geometric characteristics of defined patterns, and isolate the suspicious regions which in turn provide the improved segmentation of objects. In this paper, a combined method of using morphological operations and contextual Bayesian relaxation labeling was developed to enhance and segment various mammographic contexts and textures. This method has been used to segment mammographic images for the extraction of masses. The testing results showed that the proposed method can detect all suspected masses as well as high contrast objects.","PeriodicalId":294120,"journal":{"name":"Proceedings of the 1996 Fifteenth Southern Biomedical Engineering Conference","volume":"11 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":"115114785","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
Removal of interference from electrophysiologic signals concurrent with functional magnetic resonance imaging 去除与功能性磁共振成像同时发生的电生理信号的干扰
Proceedings of the 1996 Fifteenth Southern Biomedical Engineering Conference Pub Date : 1996-03-29 DOI: 10.1109/SBEC.1996.493155
E. Lovett, J. Myklebust
{"title":"Removal of interference from electrophysiologic signals concurrent with functional magnetic resonance imaging","authors":"E. Lovett, J. Myklebust","doi":"10.1109/SBEC.1996.493155","DOIUrl":"https://doi.org/10.1109/SBEC.1996.493155","url":null,"abstract":"A computationally efficient, easily implemented, and highly effective algorithm is developed to remove burst noise due to radiofrequency pulses used in functional magnetic resonance imaging (FMRI) from concurrent physiologic time series. The algorithm is used in this case to eliminate FMRI burst noise from electrocardiograms, but may also be employed in any situation where nonlinear manifestations of measurable noise instantaneously corrupt a desired signal.","PeriodicalId":294120,"journal":{"name":"Proceedings of the 1996 Fifteenth Southern Biomedical Engineering Conference","volume":"14 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":"116988371","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
A new index for quantifying walking foot pressure patterns in Hansen's disease 一种量化汉森氏病步行足部压力模式的新指标
Proceedings of the 1996 Fifteenth Southern Biomedical Engineering Conference Pub Date : 1996-03-29 DOI: 10.1109/SBEC.1996.493109
M. Bhatia, K. M. Patil
{"title":"A new index for quantifying walking foot pressure patterns in Hansen's disease","authors":"M. Bhatia, K. M. Patil","doi":"10.1109/SBEC.1996.493109","DOIUrl":"https://doi.org/10.1109/SBEC.1996.493109","url":null,"abstract":"The purpose of this work is to quantify the effects of various pathological conditions observed in Hansen's disease subjects on their barefoot walking foot pressure patterns. A new index called Contact Ratio Index (CRI), which takes into account the pressure and the time for which it acts, is used to compare foot pressure patterns of normals and Hansen's disease subjects. Foot pressure patterns are recorded using the optical pedobarograph. The feet are classified such that all feet in one class show similar clinical and radiological conditions. Results show that values of CRI in various regions of the foot reflect its clinical and radiological condition. Thus, CRI could possibly provide a quantitative insight into the condition of the foot to the clinician.","PeriodicalId":294120,"journal":{"name":"Proceedings of the 1996 Fifteenth Southern Biomedical Engineering Conference","volume":"43 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":"117104357","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
Ergonomics, spinal injury, and industrial vehicle safety 人体工程学，脊柱损伤，工业车辆安全
Proceedings of the 1996 Fifteenth Southern Biomedical Engineering Conference Pub Date : 1996-03-29 DOI: 10.1109/SBEC.1996.493146
R. Mclay, D. Wilder, M. Molloy
{"title":"Ergonomics, spinal injury, and industrial vehicle safety","authors":"R. Mclay, D. Wilder, M. Molloy","doi":"10.1109/SBEC.1996.493146","DOIUrl":"https://doi.org/10.1109/SBEC.1996.493146","url":null,"abstract":"Explores the mechanisms of spinal injury in industrial vehicle accidents. The biomechanics of balance, response to sudden loads, and impact and vibration are shown to influence the nature of trauma. A simulation of the occupant motion in a sit-down forklift shows the loads in a tipover. The packaging of the driver is discussed to reduce the probability of spinal injury.","PeriodicalId":294120,"journal":{"name":"Proceedings of the 1996 Fifteenth Southern Biomedical Engineering Conference","volume":"9 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":"128335057","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
A biomechanical evaluation of the stability of small and large diameter dental implants: preliminary study 小直径和大直径种植体稳定性的生物力学评价:初步研究
Proceedings of the 1996 Fifteenth Southern Biomedical Engineering Conference Pub Date : 1996-03-29 DOI: 10.1109/SBEC.1996.493152
H. Kido, A. Kumar, E. Schulz, J. Lozada, S. Saha
{"title":"A biomechanical evaluation of the stability of small and large diameter dental implants: preliminary study","authors":"H. Kido, A. Kumar, E. Schulz, J. Lozada, S. Saha","doi":"10.1109/SBEC.1996.493152","DOIUrl":"https://doi.org/10.1109/SBEC.1996.493152","url":null,"abstract":"The aim of this study was to compare the immediate implant mobility and the pull-out resistance of large diameter dental implant (4.5 mm) with a standard size (3.25 mm) implant. Two groups consisting of 18 implants, were placed in 5 embalmed human mandibles. The result of Periotest showed the same initial stability for the two groups. The maximum pull-out force for large diameter implants was 16% greater than that for the small diameter implants, although this difference was not statistically significant. There were significant positive correlation (p<0.05, p<0.01) between the pull-out force and the bone density for the large and small diameter implants.","PeriodicalId":294120,"journal":{"name":"Proceedings of the 1996 Fifteenth Southern Biomedical Engineering Conference","volume":"22 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":"127444621","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
Tactile feedback with adaptive controller for a force-reflecting haptic display. 1. Design 触觉反馈与自适应控制器的力反射触觉显示。1. 设计
Proceedings of the 1996 Fifteenth Southern Biomedical Engineering Conference Pub Date : 1996-03-29 DOI: 10.1109/SBEC.1996.493294
C. J. Hasser, M. W. Daniels
{"title":"Tactile feedback with adaptive controller for a force-reflecting haptic display. 1. Design","authors":"C. J. Hasser, M. W. Daniels","doi":"10.1109/SBEC.1996.493294","DOIUrl":"https://doi.org/10.1109/SBEC.1996.493294","url":null,"abstract":"Describes the development of custom-built tactile feedback hardware and its integration with an available force reflecting haptic interface. Design requirements were motivated strongly by the characteristics of the human tactile sense as well as the biomechanical characteristics of the human finger. The work explores the feasibility of various actuators, and selects a small solenoid actuator for application in a closed-loop force control tactile feedback system. System architecture is described, including a simple PI controller. A companion paper describes an adaptive controller with continuously variable gain scheduling that is based upon this PI controller, and includes an evaluation of the system.","PeriodicalId":294120,"journal":{"name":"Proceedings of the 1996 Fifteenth Southern Biomedical Engineering Conference","volume":"02 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":"129983748","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: 26
Measurement of the strain field in heterogeneous, diseased human aorta 异质病变人主动脉应变场的测量
Proceedings of the 1996 Fifteenth Southern Biomedical Engineering Conference Pub Date : 1996-03-29 DOI: 10.1109/SBEC.1996.493123
D. Beattie, R. Vito, C. Xu, S. Glagov
{"title":"Measurement of the strain field in heterogeneous, diseased human aorta","authors":"D. Beattie, R. Vito, C. Xu, S. Glagov","doi":"10.1109/SBEC.1996.493123","DOIUrl":"https://doi.org/10.1109/SBEC.1996.493123","url":null,"abstract":"Atherosclerosis continues to be a leading cause of death and disability in this and other western industrialized nations. Although little is known regarding the relationships between stresses and strains in the arterial wall and disease etiology, one of the most clinically relevant issues is the stability of the established plaque. In this research, an experimental technique was developed to determine the strain field in heterogeneous, diseased arterial cross-sections in vitro. The nonuniform strain field in atherosclerotic aorta correlates with histologic attributes such as the plaque fibrous cap, lipid accumulations, and regions of calcification. By coupling experimental and histologic data into a finite element model, plaque mechanical properties, stresses, and strain energies can be determined using inverse solution techniques. Such results form a basis for establishing links between the composition of diseased vessels and plaque failure.","PeriodicalId":294120,"journal":{"name":"Proceedings of the 1996 Fifteenth Southern Biomedical Engineering Conference","volume":"16 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":"130210493","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
A programmable-gain VLSI circuit and system for sensing and stimulating action potentials of neuronal networks 用于感知和刺激神经网络动作电位的可编程增益VLSI电路和系统
Proceedings of the 1996 Fifteenth Southern Biomedical Engineering Conference Pub Date : 1996-03-29 DOI: 10.1109/SBEC.1996.493121
A. Loloee, W. Gosney, L. L. Howard
{"title":"A programmable-gain VLSI circuit and system for sensing and stimulating action potentials of neuronal networks","authors":"A. Loloee, W. Gosney, L. L. Howard","doi":"10.1109/SBEC.1996.493121","DOIUrl":"https://doi.org/10.1109/SBEC.1996.493121","url":null,"abstract":"An analog/digital VLSI chip and a 64-channel system using four of the chips for sensing and stimulating signals from live neuronal networks are described. Each chip has 16 analog channels, each having an instrumentation amplifier with a programmable gain of either 27, 50, or 60. In the system sense mode the action potentials from the network can be monitored and amplified on any or all selected channels. In the system stimulation mode up to four external stimulation signals can be routed to the network through any or all of the 16 channels. A 4/spl times/16 cross-point transmission-gate array connects the stimulation signals to the selected channels. The network response to the stimulation signals can be monitored at the output of selectable channels.","PeriodicalId":294120,"journal":{"name":"Proceedings of the 1996 Fifteenth Southern Biomedical Engineering Conference","volume":"10 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":"132308416","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
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