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Proceedings of the 20th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Vol.20 Biomedical Engineering Towards the Year 2000 and Beyond (Cat. No.98CH36286)最新文献

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An analysis of skin temperature changes under pressure loading and relief by animal experiments 动物实验分析压力加载与解除时皮肤温度的变化
Proceedings of the 20th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Vol.20 Biomedical Engineering Towards the Year 2000 and Beyond (Cat. No.98CH36286) Pub Date : 1998-12-01 DOI: 10.1109/IEMBS.1998.745240
T. Kemuriyama, J. Niitsuma, H. Yano, T. Komeda
{"title":"An analysis of skin temperature changes under pressure loading and relief by animal experiments","authors":"T. Kemuriyama, J. Niitsuma, H. Yano, T. Komeda","doi":"10.1109/IEMBS.1998.745240","DOIUrl":"https://doi.org/10.1109/IEMBS.1998.745240","url":null,"abstract":"For immobile patients pressure sores are one of the most severe diseases. In this study we examined the skin temperature under pressure loading and relief by animal experiments. The results obtained show that the skin temperature of the ischemic area changed due to the same pressure loading and relief in different constant ambient temperature. In order to prevent pressure sores, it is therefore necessary not only to measure the pressure relief but to analyze the skin temperature under the pressure loading and relief.","PeriodicalId":156581,"journal":{"name":"Proceedings of the 20th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Vol.20 Biomedical Engineering Towards the Year 2000 and Beyond (Cat. No.98CH36286)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128522766","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
Discriminating at-risk post-MI patients by fractal dimension analysis of the late potential attractor 晚期电位吸引子分形维数分析鉴别心肌梗死后高危患者
Proceedings of the 20th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Vol.20 Biomedical Engineering Towards the Year 2000 and Beyond (Cat. No.98CH36286) Pub Date : 1998-11-15 DOI: 10.1109/IEMBS.1998.747193
R. Mitchell, O. Escalona
{"title":"Discriminating at-risk post-MI patients by fractal dimension analysis of the late potential attractor","authors":"R. Mitchell, O. Escalona","doi":"10.1109/IEMBS.1998.747193","DOIUrl":"https://doi.org/10.1109/IEMBS.1998.747193","url":null,"abstract":"A novel and reliable approach which quantifies the degree of complexity of late potential (LP) activity in the time domain is presented. By defining the LP attractor in the microvoltage, 3-dimensional space, and then computing the fractal dimension (/spl delta/) of the attractor's trajectory, the degree of complexity of LP can be quantified with a single parameter. /spl delta/ may indicate the chaotic behaviour of the terminal activity of the ventricular depolarisation process. The fractal dimension of the LP Attractor in post-MI subjects that are at risk is significantly higher than in post-MI subjects with low LP activity (p<0.001). /spl delta/ may be considered as the criterion for discrimination. Fractal dimension analysis on LP is a novel diagnostic approach aimed at quantifying their complexity in the microvoltage 3-D space, and may be interpreted as a measure of their chaotic behaviour triggering a catastrophic arrhythmic episode.","PeriodicalId":156581,"journal":{"name":"Proceedings of the 20th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Vol.20 Biomedical Engineering Towards the Year 2000 and Beyond (Cat. No.98CH36286)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133969898","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
Refinement of left ventricle segmentation in MRI based on simulated annealing 基于模拟退火的MRI左心室分割改进
Proceedings of the 20th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Vol.20 Biomedical Engineering Towards the Year 2000 and Beyond (Cat. No.98CH36286) Pub Date : 1998-10-29 DOI: 10.1109/IEMBS.1998.745468
Griselda J. Garrido, S. Furuie, A.C.F. Orgambide
{"title":"Refinement of left ventricle segmentation in MRI based on simulated annealing","authors":"Griselda J. Garrido, S. Furuie, A.C.F. Orgambide","doi":"10.1109/IEMBS.1998.745468","DOIUrl":"https://doi.org/10.1109/IEMBS.1998.745468","url":null,"abstract":"In this work we present a methodology to refine the segmentation of 2D and 3D images with applications to MR images. Basically it consists of inclusion and exclusion of border voxels according to an energy function that encompasses contrast, texture and shape information. The decision process follows simulated annealing approach, and with proper energy function, precise segmentation can be achieved. Since there is an initial segmentation, some statistical properties and normalizing coefficients can be derived. This approach can be easily extended to other modalities.","PeriodicalId":156581,"journal":{"name":"Proceedings of the 20th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Vol.20 Biomedical Engineering Towards the Year 2000 and Beyond (Cat. No.98CH36286)","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115700016","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
Compartmental modeling in dynamic SPET using projection data 基于投影数据的动态SPET分区建模
Proceedings of the 20th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Vol.20 Biomedical Engineering Towards the Year 2000 and Beyond (Cat. No.98CH36286) Pub Date : 1998-10-29 DOI: 10.1109/IEMBS.1998.745540
P. A. Karjalainen, M. Vauhkonen, J. Kaipio
{"title":"Compartmental modeling in dynamic SPET using projection data","authors":"P. A. Karjalainen, M. Vauhkonen, J. Kaipio","doi":"10.1109/IEMBS.1998.745540","DOIUrl":"https://doi.org/10.1109/IEMBS.1998.745540","url":null,"abstract":"A method for compartmental modeling in dynamic SPET studies is proposed. The method is based on direct use of projection data and does not necessitate the reconstruction of the SPET images. The activity is modeled with the first order Markov model and the Kalman smoothing algorithm is used for the recursive estimation of the activities. The transportation coefficients are simultaneously estimated using a nonlinear output least squares method. The method is evaluated using simulations.","PeriodicalId":156581,"journal":{"name":"Proceedings of the 20th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Vol.20 Biomedical Engineering Towards the Year 2000 and Beyond (Cat. No.98CH36286)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124393749","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
Electrophysiology studies of motor nerve function recovery after using "pre-degenerated" nerve graft-correlation with histology 退行性神经移植术后运动神经功能恢复的电生理学研究——与组织学的相关性
Proceedings of the 20th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Vol.20 Biomedical Engineering Towards the Year 2000 and Beyond (Cat. No.98CH36286) Pub Date : 1998-10-29 DOI: 10.1109/IEMBS.1998.745115
J. Lao, L. Hung, W. H. Kwong
{"title":"Electrophysiology studies of motor nerve function recovery after using \"pre-degenerated\" nerve graft-correlation with histology","authors":"J. Lao, L. Hung, W. H. Kwong","doi":"10.1109/IEMBS.1998.745115","DOIUrl":"https://doi.org/10.1109/IEMBS.1998.745115","url":null,"abstract":"In this research, we used electrophysiology method, which is tetanic tension and twitch tension to examine the peripheral motor nerve regeneration after using \"pre-degenerated\" nerve graft. At the same time, we compared the histology of the regenerated nerve. We found that the recovered muscle's tetanic tension and twitch tension were very sensitive. The results of the electrophysiology correlated used with the results of histology. We concluded that the tetanic tension and twitch tension accurately expressed the motor nerve regeneration.","PeriodicalId":156581,"journal":{"name":"Proceedings of the 20th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Vol.20 Biomedical Engineering Towards the Year 2000 and Beyond (Cat. No.98CH36286)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121085729","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
Combination of magnetoencephalography (MEG) and functional magnetic resonance imaging (FMRI) for neurosurgical mapping of the sensory and motor cortices 结合脑磁图(MEG)和功能磁共振成像(FMRI)用于感觉和运动皮层的神经外科制图
Proceedings of the 20th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Vol.20 Biomedical Engineering Towards the Year 2000 and Beyond (Cat. No.98CH36286) Pub Date : 1998-10-29 DOI: 10.1109/IEMBS.1998.747050
N. Nakasato, T. Inoue, A. Takahashi, A. Kanno, K. Hatanaka, H. Shimizu, T. Kumabe, T. Yoshimoto
{"title":"Combination of magnetoencephalography (MEG) and functional magnetic resonance imaging (FMRI) for neurosurgical mapping of the sensory and motor cortices","authors":"N. Nakasato, T. Inoue, A. Takahashi, A. Kanno, K. Hatanaka, H. Shimizu, T. Kumabe, T. Yoshimoto","doi":"10.1109/IEMBS.1998.747050","DOIUrl":"https://doi.org/10.1109/IEMBS.1998.747050","url":null,"abstract":"Magnetoencephalography (MEG) and functional magnetic resonance imaging (FMRI) were applied to brain mapping in normal volunteers and three patients with tumors. Somatosensory evoked fields (SEFs) due to median, ulnar and posterior tibial nerve stimulation were measured using a whole head MEG system. FMRI used an echo planner imaging method during hand, toe and lip movement. Estimated SEF dipoles and activated FMRI regions were superimposed on anatomical MRI. The central sulcus was identified by source localization of the SEFs in all subjects. Functional abnormality could be detected as reduced amplitude or latency delay of the SEF peaks. FMRI indicated multiple and extended regions of activation, such as primary motor, primary sensory and supplementary motor cortices. The highest signal activation was usually found in the contralateral primary sensory/motor cortices. However, the primary motor and sensory cortices were not activated due the effect of the lesion in one patient. The highest activation was found far posterior to the central sulcus due to a large venous inflow effect in another patient. The combination of MEG and FMRI can avoid any misinterpretation due to use of only one method of functional brain mapping, especially in patients with brain lesions.","PeriodicalId":156581,"journal":{"name":"Proceedings of the 20th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Vol.20 Biomedical Engineering Towards the Year 2000 and Beyond (Cat. No.98CH36286)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121244885","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 speech processing strategy of cochlear implants based on tonal information of Chinese language 一种基于汉语声调信息的人工耳蜗语音处理策略
Proceedings of the 20th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Vol.20 Biomedical Engineering Towards the Year 2000 and Beyond (Cat. No.98CH36286) Pub Date : 1998-10-29 DOI: 10.1109/IEMBS.1998.746162
K. Nie, N. Lan, Shangkai Gao
{"title":"A speech processing strategy of cochlear implants based on tonal information of Chinese language","authors":"K. Nie, N. Lan, Shangkai Gao","doi":"10.1109/IEMBS.1998.746162","DOIUrl":"https://doi.org/10.1109/IEMBS.1998.746162","url":null,"abstract":"Chinese language is significantly different from other languages such as English. It is known as a tonal language with explicit variation of pitch in the pronunciation of words. The objective of this paper is to develop a speech processing strategy for cochlear implant based on characteristics of Chinese language. The paper discusses first the characteristics of Chinese speech signals, and then presents simulation results on the effect of pitch variation in speech perception. Results show that adding tonal information to a CIS (Continuous Interleaved Sampling) speech processor will offer an improved intelligibility of spoken Chinese. Based on the CIS strategy, a novel speech processor with dynamic modulation of stimulation rate is proposed for cochlear implants for use with Chinese deaf people.","PeriodicalId":156581,"journal":{"name":"Proceedings of the 20th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Vol.20 Biomedical Engineering Towards the Year 2000 and Beyond (Cat. No.98CH36286)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127177003","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
Relation between auditory stimulus intensity and response of P300 with eyes-opened and eyes-closed state 听觉刺激强度与睁眼、闭眼状态下P300反应的关系
Proceedings of the 20th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Vol.20 Biomedical Engineering Towards the Year 2000 and Beyond (Cat. No.98CH36286) Pub Date : 1998-10-29 DOI: 10.1109/IEMBS.1998.746995
T. Fukami, T. Shiina, F. Ishikawa, Y. Saito
{"title":"Relation between auditory stimulus intensity and response of P300 with eyes-opened and eyes-closed state","authors":"T. Fukami, T. Shiina, F. Ishikawa, Y. Saito","doi":"10.1109/IEMBS.1998.746995","DOIUrl":"https://doi.org/10.1109/IEMBS.1998.746995","url":null,"abstract":"For the purpose of examining how the auditory stimulus level and the eyesight have a mutual influence on ERP, we tried to investigate the relation between auditory stimulus level and latency of P300 with eyes-opened (EO) and eyes-closed (EC) state. Two auditory stimulus levels are selected as high-intensity (HI; 80 dBNHL) and low intensity (LI; 10 dBNHL). It has been regarded that the latency of P300 became longer as the auditory stimulus level decreased while the latency was not so different between EO and EC. However, we found that the latter did not always hold true though the former coincided with our experimental results. The latency at HI tended to be longer comparatively with EO, while in the case of LI the latency was longer with EC. Consequently, the latency variation resulting from the change of stimulus level with EC was larger than with EO. In this paper, we evaluated this phenomenon more quantitatively.","PeriodicalId":156581,"journal":{"name":"Proceedings of the 20th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Vol.20 Biomedical Engineering Towards the Year 2000 and Beyond (Cat. No.98CH36286)","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127215033","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
QRS complex detection by the combination of maxima and zero-crossing points of wavelet transform 利用小波变换的极大值交叉点和过零点相结合的QRS复合体检测方法
Proceedings of the 20th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Vol.20 Biomedical Engineering Towards the Year 2000 and Beyond (Cat. No.98CH36286) Pub Date : 1998-10-29 DOI: 10.1109/IEMBS.1998.745861
Yanli Zheng, G. Hu
{"title":"QRS complex detection by the combination of maxima and zero-crossing points of wavelet transform","authors":"Yanli Zheng, G. Hu","doi":"10.1109/IEMBS.1998.745861","DOIUrl":"https://doi.org/10.1109/IEMBS.1998.745861","url":null,"abstract":"The proposed algorithm uses the wavelet transform (WT) to detect the QRS complex of an electrocardiogram (ECG). Compared to other algorithms, which only use WT zero-crossing points, this algorithm detects the ECG characteristic points by a combination of the maxima and the zero-crossings of the WT. This algorithm can easily distinguish the QRS complex by comparison with prior work. The detection method and results are presented.","PeriodicalId":156581,"journal":{"name":"Proceedings of the 20th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Vol.20 Biomedical Engineering Towards the Year 2000 and Beyond (Cat. No.98CH36286)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127220149","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
Implementation of fuzzy control over FES-assisted locomotion for CVA patients CVA患者fes辅助运动的模糊控制实现
Proceedings of the 20th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Vol.20 Biomedical Engineering Towards the Year 2000 and Beyond (Cat. No.98CH36286) Pub Date : 1998-10-29 DOI: 10.1109/IEMBS.1998.745237
Ming-Han Chang, Yu-Leun Chen, Kuang-Ching Wang, T. Kuo
{"title":"Implementation of fuzzy control over FES-assisted locomotion for CVA patients","authors":"Ming-Han Chang, Yu-Leun Chen, Kuang-Ching Wang, T. Kuo","doi":"10.1109/IEMBS.1998.745237","DOIUrl":"https://doi.org/10.1109/IEMBS.1998.745237","url":null,"abstract":"In this research, an Functional Electrical Stimulation (FES) system has been designed to assist Cerebral Vascular Accident (CVA) patients during the locomotion rehabilitation process. Cutaneous electrical stimulation applied over tibialis anterior muscle induced the ankle's dorsi flexion to certain degrees. An artificial neural network (ANN) was implemented to estimate the nonlinear mapping relation between stimulation levels and both ankle and knee angles for each individual subject. A rule-based fuzzy controller was used to real-time adjust the stimulating waveform so that convergence to a suitable desired flexion angle was achieved. A user friendly Windows-based interface was offered, where all fuzzy parameters and rules are adjustable, offering physical therapists' a flexible tool to find out most suitable angles for different individuals. The whole system including hardware and software has been successfully setup and tested with normal subjects in laboratory; it has also been installed to operate with a treadmill as a locomotion rehabilitation system in the hospital, where clinical tests will be held.","PeriodicalId":156581,"journal":{"name":"Proceedings of the 20th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Vol.20 Biomedical Engineering Towards the Year 2000 and Beyond (Cat. No.98CH36286)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127262947","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
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