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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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Study of muscle contraction through a temporal parameter of the myoelectric signal 通过肌电信号的时间参数研究肌肉收缩
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.1998.745172
M.A.C. Garcia, M.N. Souza
{"title":"Study of muscle contraction through a temporal parameter of the myoelectric signal","authors":"M.A.C. Garcia, M.N. Souza","doi":"10.1109/IEMBS.1998.745172","DOIUrl":"https://doi.org/10.1109/IEMBS.1998.745172","url":null,"abstract":"This work presents the analysis of muscular contraction based on a temporal parameter of the myoelectric signal. This parameter is the intervals between adjacent zero crossings of the signal. Since it is a kind of random variable, it is characterized by statistical properties derived from its histogram. In this paper the systematic way of obtaining such statistical properties was to fit a probability distribution function, the Weibull function, to the parameter histogram. The results of central tendency and dispersion of the fitted function were studied before and after a muscular training period in 4 different groups, separated by sex and for training conditions. These results point out that these statistical properties can contribute in the analysis of the muscular contraction.","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":"143 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":"127288878","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
Fiber-optic viscoelasticity measurement system for embryo: gelatin model experiment 胚胎明胶模型实验用光纤粘弹性测量系统
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.1998.746959
H. Itoh, T. Araia, M. Kikuchia, N. Morita, M. Obara
{"title":"Fiber-optic viscoelasticity measurement system for embryo: gelatin model experiment","authors":"H. Itoh, T. Araia, M. Kikuchia, N. Morita, M. Obara","doi":"10.1109/IEMBS.1998.746959","DOIUrl":"https://doi.org/10.1109/IEMBS.1998.746959","url":null,"abstract":"We studied a fiber-optic dynamic viscoelasticity measurement system to develop a noninvasive measurement for human embryo viability. We obtained the dynamic viscoelasticity of a gelatin gel model (1/spl times/1/spl times/1 cm) by optical displacement monitoring, stress and phase difference monitoring. In our preliminary system, we employed the combination of noninvasive optical displacement measurement and contact vibrational addition to the sample. Fiber-optic reflectometry of a He-Ne laser through a thin fiber was used. We obtained the linear relation between the estimated dynamic viscoelasticity and gelatin concentration to be from 3.75 to 7.5%. Moreover, this estimated dynamic viscoelasticity coincided with the reported value. These results indicated the possibility of noncontact and noninvasive effective evaluation for embryo viability.","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":"65 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":"127341451","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
Brain tissue classification in MR images based on a 3D MRF model 基于三维磁共振成像模型的磁共振图像脑组织分类
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.1998.745492
S. Ruan, C. Jaggi, D. Bloyet, B. Mazoyer
{"title":"Brain tissue classification in MR images based on a 3D MRF model","authors":"S. Ruan, C. Jaggi, D. Bloyet, B. Mazoyer","doi":"10.1109/IEMBS.1998.745492","DOIUrl":"https://doi.org/10.1109/IEMBS.1998.745492","url":null,"abstract":"Intensity-based classification of MR images has proven problematic, even when advanced techniques are used. The partial volume effect and the inhomogeneity are usually sources of difficulties. Here, the authors propose a new classification method using 3D MRF models and the multifractal dimension measure for segmenting CSF, gray matter and white matter in MR T1-weighted images. Mixclasses (mixture of two pure tissue classes) result from the partial volume effect, are taken into account in the authors' tissue class model. Results are described with two acquisition sequences: IR-FGRE and SPGR. The accuracy of the classification is found by the way of a phantom validation study.","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":"45 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":"124871301","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
An automatic 3D surface extraction in ultrasonic images 超声图像的自动三维表面提取
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.1998.745572
X. Hao, Shangkai Gao, Xiaorong Gao, Y. Xin, Tanghui Zhang
{"title":"An automatic 3D surface extraction in ultrasonic images","authors":"X. Hao, Shangkai Gao, Xiaorong Gao, Y. Xin, Tanghui Zhang","doi":"10.1109/IEMBS.1998.745572","DOIUrl":"https://doi.org/10.1109/IEMBS.1998.745572","url":null,"abstract":"Presents an automatic 3D surface extraction method for ultrasonic images. In this technique, an image sequence is obtained along one axis of the 3D grid data. Based on the space continuity of the object, the region of interest (ROI) in each frame is determined by using a novel Polygon-based Tracking (PT) method. The edge in the ROI is then automatically extracted by the region growing technique, whose character vector is linearly constructed by the pixel value and the local entropy. Finally, the 3D surface is formed by recombination of the edges in a 2D image sequence. Experiments on water bubble ultrasonic images show that the new method is successful in detection of 3D surfaces.","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":"72 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":"125869175","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
Assessing motor nerve lesion from CMAP decomposition 从CMAP分解评估运动神经损伤
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.1998.745169
Tong Xu, S. Xiao, W. Ip
{"title":"Assessing motor nerve lesion from CMAP decomposition","authors":"Tong Xu, S. Xiao, W. Ip","doi":"10.1109/IEMBS.1998.745169","DOIUrl":"https://doi.org/10.1109/IEMBS.1998.745169","url":null,"abstract":"Quantitative characterization of peripheral nerve lesion has been facilitated by estimating the distribution of added delays (DADs) from the compound nerve action potentials (CAPs) evoked from stimulating the proximal and distal site of the lesion. In this paper, compound muscle action potentials (CMAPs) are proposed for estimating the DADs of motor nerves. A case of ulnar nerve entrapment at elbow is used to illustrate the assessment methods where the CMAPs above abductor digiti minimi (ADM) are recorded from stimulating ulnar nerve at wrist, at below-elbow, and at above-elbow. Three kinds of approximation are proposed to assess the motor DAD based on the MUAP-CMAP model. A simplified method could provide a more sensitive noninvasive assessment on motor nerve lesion.","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":"25 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":"126027999","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
New reconfigurable ultrasonic enuresis monitoring system 新型可重构遗尿超声监测系统
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.1998.745549
P. Beauchamp-Parent, M. Sawan
{"title":"New reconfigurable ultrasonic enuresis monitoring system","authors":"P. Beauchamp-Parent, M. Sawan","doi":"10.1109/IEMBS.1998.745549","DOIUrl":"https://doi.org/10.1109/IEMBS.1998.745549","url":null,"abstract":"Nocturnal enuresis (bed-wetting) is a common disorder for children between the ages of 5 and 15. Though the problem usually clears up on its own, nocturnal enuresis sometime leads to serious psychological and social consequences if not dealt with properly. Behavior modification approaches, such as the enuresis alarm system, have been clinically proven to be the only nocturnal enuresis treatment strategy with persistent effectiveness. Available enuresis alarm systems, which condition the child to anticipate micturition, do not prevent bed-wetting during therapy. This paper describes the design of a new reconfigurable miniaturized ultrasonic monitor which wakens the patient a short time before his bladder reaches a critical volume (start of micturition). The detection approach is based on the evaluation of the biggest bladder's depth using an A mode pulse/echo technique. This enuresis alarm system is reconfigurable to adjust the threshold depth according to the child's bladder morphology. A 4/spl times/16 character LCD screen has been implemented to validate measurements performed during the upcoming clinical evaluation of the device.","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":"2 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":"126191845","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
Sub-micrometre AC electrokinetics 亚微米交流电动力学
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.1998.746114
N. Green, H. Morgan
{"title":"Sub-micrometre AC electrokinetics","authors":"N. Green, H. Morgan","doi":"10.1109/IEMBS.1998.746114","DOIUrl":"https://doi.org/10.1109/IEMBS.1998.746114","url":null,"abstract":"AC electrokinetics is a general term which refers to a range of techniques for which electric fields are used to study and manipulate particles, particularly bioparticles, and fluids. It has proved successful in the characterisation of cells and bacteria as well as the separation of particle types. Recent application of this technique to the sub-micrometre range (viruses, DNA and proteins) has opened up a new field of research in bioparticle diagnostics. This paper discusses AC electrokinetic techniques such as dielectrophoresis (DEP), electrorotation and travelling-wave dielectrophoresis, and in particular the application of DEP in the colloidal domain. Results of the dielectrophoretic properties of spherical latex particles and tobacco mosaic virus are presented. The use of electric fields to control the movement of fluids and particles is also discussed.","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":"271 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":"123301780","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
Measurements of absorption coefficients within biological tissue in vitro 体外生物组织内吸收系数的测量
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.1998.746110
N. Kim, H. Lim
{"title":"Measurements of absorption coefficients within biological tissue in vitro","authors":"N. Kim, H. Lim","doi":"10.1109/IEMBS.1998.746110","DOIUrl":"https://doi.org/10.1109/IEMBS.1998.746110","url":null,"abstract":"The authors have examined the absorption coefficients of biological tissue in vitro. To develop the medical instruments for most applications, they have used as a light source the specific fixed wavelengths of lasers. So there are some restrictions while using the optical properties of biological tissue. To broaden the selection of wavelength, the authors experimented with 660/spl sim/940 nm on the highly scattering turbid medium to find out optical properties. The results shows that the absorption coefficients are different depending on wavelength and for each biological tissue.","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":"126 5 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":"123305161","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
A 3D colour Doppler ultrasound imaging system for in vitro estimation of flow parameters downstream of prosthetic heart valves 三维彩色多普勒超声成像系统体外估计人工心脏瓣膜下游的血流参数
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.1998.745553
H. Sava, P. Pibarot, J. Dumesil, A. Fenster, L. Durand
{"title":"A 3D colour Doppler ultrasound imaging system for in vitro estimation of flow parameters downstream of prosthetic heart valves","authors":"H. Sava, P. Pibarot, J. Dumesil, A. Fenster, L. Durand","doi":"10.1109/IEMBS.1998.745553","DOIUrl":"https://doi.org/10.1109/IEMBS.1998.745553","url":null,"abstract":"The paper presents a 3D colour ultrasound imaging system for the estimation of flow parameters downstream of prosthetic heart valves. The system consists of an ATL Ultramark 9 HDI colour Doppler ultrasound machine with a 38 mm aperture and a 5 MHz high resolution linear array transducer, a 3D ultrasound imaging system, and an in vitro circulation system under which the prosthetic heart valves are tested. Preliminary results obtained in the case of St. Jude prosthetic heart valves show that the technique can be used successfully to estimate the mean flow velocity, the cross-sectional area of the forward flow, and the impact of the jets. Further work is required for more quantitative evaluation of flow velocity. In this context, some suggestions are presented in order to improve the velocity estimation.","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":"112 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":"125563189","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
A sinogram restoration technique for the hollow projection problem in computer tomography 计算机断层扫描中空洞投影问题的正弦图恢复技术
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.1998.745502
Ziying Liu, S. Yau
{"title":"A sinogram restoration technique for the hollow projection problem in computer tomography","authors":"Ziying Liu, S. Yau","doi":"10.1109/IEMBS.1998.745502","DOIUrl":"https://doi.org/10.1109/IEMBS.1998.745502","url":null,"abstract":"This paper studies the hollow projection problem in computer tomography which occurs frequently in medical imaging, for example when the patient has a metal implant such as a hip-joint that attenuates the rays completely. Here, an interpolation method is presented to restore a complete sinogram from the available incomplete data. The algorithm is based on the Ludwig-Helgason Consistency Theorem and uses the edge values of the missing part of the incomplete sinogram. A computationally efficient algorithm is proposed to solve the interpolation problem. Computer simulation results demonstrate that the proposed method works well.","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":"19 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":"114956239","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
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