Pub Date : 1993-10-28DOI: 10.1109/IEMBS.1993.978934
Jing Rai, Dongsheng Wu, J. Zhaing
' effect of extemd * model for Abstrsd--To stub/ the haemob/nanr: cumterptsation, a cgxrter si"n normdad heatf&reabjecthasbeenestdskd. Thefdnghearthasbeenmodeled by a mrltph/ing factor to the v -. 7he c o r m modej hasbeenextendedto hc&de the cdlapsng effect dring systolic m-. usi.rg this model. computer si"tmvebeenperformedmf&wing aspects: courterpulsaKxlwithd without krttodc bdoons; Effectsof dration of pressue PtateaJ and tine i r t e n r d s f o r W P r l s i r g ; The energy com&" of the function of tt is assst device to the faihg heat. The results indmte mat effective assistcarbeachievedby a proper Settirg of the contrd scheme. Among the amtrd ofilftatngtining of merent bdoons and the
{"title":"On assistant of external counterpulsation to failing heart","authors":"Jing Rai, Dongsheng Wu, J. Zhaing","doi":"10.1109/IEMBS.1993.978934","DOIUrl":"https://doi.org/10.1109/IEMBS.1993.978934","url":null,"abstract":"' effect of extemd * model for Abstrsd--To stub/ the haemob/nanr: cumterptsation, a cgxrter si\"n normdad heatf&reabjecthasbeenestdskd. Thefdnghearthasbeenmodeled by a mrltph/ing factor to the v -. 7he c o r m modej hasbeenextendedto hc&de the cdlapsng effect dring systolic m-. usi.rg this model. computer si\"tmvebeenperformedmf&wing aspects: courterpulsaKxlwithd without krttodc bdoons; Effectsof dration of pressue PtateaJ and tine i r t e n r d s f o r W P r l s i r g ; The energy com&\" of the function of tt is assst device to the faihg heat. The results indmte mat effective assistcarbeachievedby a proper Settirg of the contrd scheme. Among the amtrd ofilftatngtining of merent bdoons and the","PeriodicalId":408657,"journal":{"name":"Proceedings of the 15th Annual International Conference of the IEEE Engineering in Medicine and Biology Societ","volume":"27 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116625367","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}
Pub Date : 1993-10-28DOI: 10.1109/IEMBS.1993.978856
R. Patterson, Li Wang
{"title":"Thoracic current pathways for different size and position external deflibrillation electrodes based on a 3D model","authors":"R. Patterson, Li Wang","doi":"10.1109/IEMBS.1993.978856","DOIUrl":"https://doi.org/10.1109/IEMBS.1993.978856","url":null,"abstract":"","PeriodicalId":408657,"journal":{"name":"Proceedings of the 15th Annual International Conference of the IEEE Engineering in Medicine and Biology Societ","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129593732","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}
Pub Date : 1993-10-28DOI: 10.1109/IEMBS.1993.978566
Yu Tang, A. Norcia
We modified the Adaptive Noise Cancellation procedure of Widrow et al. (11 for use as an adaptive band-pass filter to process Steady-State Evoked Potentials (SSEPs). The adative filter yields an approsimate 10 dB improvement in Signal to Noise Ratio over the Discrete Fourier Transform.
{"title":"An adaptive filter for steady-state evoked potentials","authors":"Yu Tang, A. Norcia","doi":"10.1109/IEMBS.1993.978566","DOIUrl":"https://doi.org/10.1109/IEMBS.1993.978566","url":null,"abstract":"We modified the Adaptive Noise Cancellation procedure of Widrow et al. (11 for use as an adaptive band-pass filter to process Steady-State Evoked Potentials (SSEPs). The adative filter yields an approsimate 10 dB improvement in Signal to Noise Ratio over the Discrete Fourier Transform.","PeriodicalId":408657,"journal":{"name":"Proceedings of the 15th Annual International Conference of the IEEE Engineering in Medicine and Biology Societ","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128459793","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}
Pub Date : 1993-10-28DOI: 10.1109/IEMBS.1993.978729
J. Jeiewski, J. Wrobel
{"title":"Fetal monitoring with automated analysis of cardiotocogram: the Kompor system","authors":"J. Jeiewski, J. Wrobel","doi":"10.1109/IEMBS.1993.978729","DOIUrl":"https://doi.org/10.1109/IEMBS.1993.978729","url":null,"abstract":"","PeriodicalId":408657,"journal":{"name":"Proceedings of the 15th Annual International Conference of the IEEE Engineering in Medicine and Biology Societ","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128587689","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}
Pub Date : 1993-10-28DOI: 10.1109/IEMBS.1993.979317
T. Fortin, J. Coudert, P. Sautot, S. Lavallée
Standard dental implant planntng strategy consuls of a prosthesis simulation on diagnostic casts and radiographs ezamination of anatomical structures. The clinician reports the planned trajecto y on surgical site with nanual accuracy and without encoded parameter. We have developed a computer assisted technique that makes possible first, a 9D simulation for implant placement in bone, and second, an actual placement of the planned implant.
{"title":"Dental implant, computer assisted surgical guide","authors":"T. Fortin, J. Coudert, P. Sautot, S. Lavallée","doi":"10.1109/IEMBS.1993.979317","DOIUrl":"https://doi.org/10.1109/IEMBS.1993.979317","url":null,"abstract":"Standard dental implant planntng strategy consuls of a prosthesis simulation on diagnostic casts and radiographs ezamination of anatomical structures. The clinician reports the planned trajecto y on surgical site with nanual accuracy and without encoded parameter. We have developed a computer assisted technique that makes possible first, a 9D simulation for implant placement in bone, and second, an actual placement of the planned implant.","PeriodicalId":408657,"journal":{"name":"Proceedings of the 15th Annual International Conference of the IEEE Engineering in Medicine and Biology Societ","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128734165","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}
Pub Date : 1993-10-28DOI: 10.1109/IEMBS.1993.978482
R. Velthuizen, L. Hall, R. R. Yager, L. Clarke
Robert P. Velthuizen, Lawrence 0. Hallt, Ronald R Yagefl and Lawrence P. Clarke Center for Engineering and Medical Image Analysis (CEMZA) at the University of South morida, Dept of Radiology, 12901 Bruce B Downs Blvd, Box 17, Tampa FL 33612 ?College of Engineering, University of South Florida, Box ENG 118, Tampa, FL 33620 $Machine Intelligence Institute, Iona College, New Rochelle, NY 10801 e-mail: vdt@rad.usf.edu
罗伯特·韦维仁，劳伦斯。南森达大学工程和医学图像分析中心(CEMZA)，放射科，12901 Bruce B Downs Blvd, Box 17，佛罗里达州坦帕市33612;南佛罗里达大学工程学院，Box ENG 118，佛罗里达州坦帕市33612;Iona学院机器智能研究所，纽约州新罗谢尔市10801电子邮件:vdt@rad.usf.edu
{"title":"An initialization scheme for clustering of MR images of the brain","authors":"R. Velthuizen, L. Hall, R. R. Yager, L. Clarke","doi":"10.1109/IEMBS.1993.978482","DOIUrl":"https://doi.org/10.1109/IEMBS.1993.978482","url":null,"abstract":"Robert P. Velthuizen, Lawrence 0. Hallt, Ronald R Yagefl and Lawrence P. Clarke Center for Engineering and Medical Image Analysis (CEMZA) at the University of South morida, Dept of Radiology, 12901 Bruce B Downs Blvd, Box 17, Tampa FL 33612 ?College of Engineering, University of South Florida, Box ENG 118, Tampa, FL 33620 $Machine Intelligence Institute, Iona College, New Rochelle, NY 10801 e-mail: vdt@rad.usf.edu","PeriodicalId":408657,"journal":{"name":"Proceedings of the 15th Annual International Conference of the IEEE Engineering in Medicine and Biology Societ","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128999360","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}
Pub Date : 1993-10-28DOI: 10.1109/IEMBS.1993.979215
M. Yarita
Biomedical magnetic stimulations are widely used. However, proper stimulus intensity measurement has not been provided for clinical application. This paper proposes a Pulse Magnetic Flux density measuring Sensor (PMFS) that consists of 2an2 sensor coil and 2Oms time constant integrator. This PMFS works without the need of power supply which allows simple use for clinical magnetic stimulation. Introduction High magnetic flux density and frequent magnetic stimulations to rat heads produced microvacuolar changes on the neuropil portion of cortex [l]. It is an essential requirement for magnetic stimulation to measure the stimulus intensity before and after the practices. However, proper stimulus intensity index is not provided but using % of the maximum output or the capacitor bank charged voltage . As a solution to the raised problem, this paper proposes the PMFS that is able to measure magnetic flux density B and its time derivative dB/dt [2) as stimulus intensity indexes. Methods An optimal sensor coil size design is investigated. 1: Magnetic flux density distribution Bz by a donut shaped stimulation coil is calculated (inner radius 33.5mm,outer radius 54mm,N=9 turns, current I4600A). 2: Bz distortions by various sensor coil sizes are calculated. 3:Prototype PMFS is designed. Fig.lA. Polygon approximation for the stimulation coil. (K=32).Fig.lB. Magnetic flux density B calculation by Biot Savart’s law at the point d. 1:Magnetic flux density Bz is calculated by Eq.(l). A polygon approximation (Fig.l,K=32) and BiotSavart’s law are applied for the magnetic flux density calculations by each polygon segment. The magnetic flux density contributions from each polygon semnent are summed at an observation point. 2:Flux density distributions Bz measured by finite sensor coils are distorted as Bzs as Fig.2.
{"title":"Pulse magnetic flux density sensor designed for biomedical magnetic stimulation","authors":"M. Yarita","doi":"10.1109/IEMBS.1993.979215","DOIUrl":"https://doi.org/10.1109/IEMBS.1993.979215","url":null,"abstract":"Biomedical magnetic stimulations are widely used. However, proper stimulus intensity measurement has not been provided for clinical application. This paper proposes a Pulse Magnetic Flux density measuring Sensor (PMFS) that consists of 2an2 sensor coil and 2Oms time constant integrator. This PMFS works without the need of power supply which allows simple use for clinical magnetic stimulation. Introduction High magnetic flux density and frequent magnetic stimulations to rat heads produced microvacuolar changes on the neuropil portion of cortex [l]. It is an essential requirement for magnetic stimulation to measure the stimulus intensity before and after the practices. However, proper stimulus intensity index is not provided but using % of the maximum output or the capacitor bank charged voltage . As a solution to the raised problem, this paper proposes the PMFS that is able to measure magnetic flux density B and its time derivative dB/dt [2) as stimulus intensity indexes. Methods An optimal sensor coil size design is investigated. 1: Magnetic flux density distribution Bz by a donut shaped stimulation coil is calculated (inner radius 33.5mm,outer radius 54mm,N=9 turns, current I4600A). 2: Bz distortions by various sensor coil sizes are calculated. 3:Prototype PMFS is designed. Fig.lA. Polygon approximation for the stimulation coil. (K=32).Fig.lB. Magnetic flux density B calculation by Biot Savart’s law at the point d. 1:Magnetic flux density Bz is calculated by Eq.(l). A polygon approximation (Fig.l,K=32) and BiotSavart’s law are applied for the magnetic flux density calculations by each polygon segment. The magnetic flux density contributions from each polygon semnent are summed at an observation point. 2:Flux density distributions Bz measured by finite sensor coils are distorted as Bzs as Fig.2.","PeriodicalId":408657,"journal":{"name":"Proceedings of the 15th Annual International Conference of the IEEE Engineering in Medicine and Biology Societ","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129086631","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}
Pub Date : 1993-10-28DOI: 10.1109/IEMBS.1993.978860
X. Min, Li Wang, M. Hill, Jin-Fa Lee, R. Mehra
To study the current dlstributlon inslde the human thorax for defibrillation shock, a complete human thorax model with detailed cardiac anatomy was constructed using CT Images. Twenty seven tlssues or organs were Menttfled by two dlmensbnal (2D) contours. Three dlmensional solids of the organs were reconstructed from these 2D contours using a solid modeling software tool. The electrode systems can be placed lnto the solid model of human thorax and the whole system can then be meshed into tetrahedrons using the Delauney Tessellation.
{"title":"A detailed human thorax FEM model for the cardiac defibrillation study","authors":"X. Min, Li Wang, M. Hill, Jin-Fa Lee, R. Mehra","doi":"10.1109/IEMBS.1993.978860","DOIUrl":"https://doi.org/10.1109/IEMBS.1993.978860","url":null,"abstract":"To study the current dlstributlon inslde the human thorax for defibrillation shock, a complete human thorax model with detailed cardiac anatomy was constructed using CT Images. Twenty seven tlssues or organs were Menttfled by two dlmensbnal (2D) contours. Three dlmensional solids of the organs were reconstructed from these 2D contours using a solid modeling software tool. The electrode systems can be placed lnto the solid model of human thorax and the whole system can then be meshed into tetrahedrons using the Delauney Tessellation.","PeriodicalId":408657,"journal":{"name":"Proceedings of the 15th Annual International Conference of the IEEE Engineering in Medicine and Biology Societ","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124640215","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}
Pub Date : 1993-10-28DOI: 10.1109/IEMBS.1993.979091
V.K. Musbahwar, K.W. Horeb
A microelectrode was used to stimulate motor neurons in the lumbo-sacral spinal cord of adult cats. Consistent with spinal cord anatomical studies, we found that the motor neurons responsible for activation of individual muscle groups are situated together in specific areas of the cord, forming motor pools. Localized spinal cord stimulation of these motor pools enables selective activation of individual muscle groups. By modulating the magnitude of stimulation at different sites in the motor pools, we should be able to selectively activate different muscle groups to produce desired levels of contraction and controlled limb movements.
{"title":"Selective activation of functional muscle groups through stimulation of spinal motor pools","authors":"V.K. Musbahwar, K.W. Horeb","doi":"10.1109/IEMBS.1993.979091","DOIUrl":"https://doi.org/10.1109/IEMBS.1993.979091","url":null,"abstract":"A microelectrode was used to stimulate motor neurons in the lumbo-sacral spinal cord of adult cats. Consistent with spinal cord anatomical studies, we found that the motor neurons responsible for activation of individual muscle groups are situated together in specific areas of the cord, forming motor pools. Localized spinal cord stimulation of these motor pools enables selective activation of individual muscle groups. By modulating the magnitude of stimulation at different sites in the motor pools, we should be able to selectively activate different muscle groups to produce desired levels of contraction and controlled limb movements.","PeriodicalId":408657,"journal":{"name":"Proceedings of the 15th Annual International Conference of the IEEE Engineering in Medicine and Biology Societ","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124691946","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}
Pub Date : 1993-10-28DOI: 10.1109/IEMBS.1993.979305
M. R. Muller, L. Ostrander
-A physical model representing the optical properties of layered biological tissue was constructed for the s tudy of light reflectance. Reflectance was measured for a spot light source incident on a medium that contained diffusive and absorptive layers. Results were analyzed by means of an index defined as the natural log ratio of reflectance intensities from a uniform and a test medium. The index was determined as a function of source-detector separation distance. The study reveals that the shape of the index curves for diffusive and absorptive layers a t depth within the medium are similar, but differ in the separation a t which a test medium begins to diverge from a uniform medium. These results demonstrate that absorptive layers must be considered separately from diffusive layers within a biological material.
{"title":"The effects of absorptive layers on light reflectance","authors":"M. R. Muller, L. Ostrander","doi":"10.1109/IEMBS.1993.979305","DOIUrl":"https://doi.org/10.1109/IEMBS.1993.979305","url":null,"abstract":"-A physical model representing the optical properties of layered biological tissue was constructed for the s tudy of light reflectance. Reflectance was measured for a spot light source incident on a medium that contained diffusive and absorptive layers. Results were analyzed by means of an index defined as the natural log ratio of reflectance intensities from a uniform and a test medium. The index was determined as a function of source-detector separation distance. The study reveals that the shape of the index curves for diffusive and absorptive layers a t depth within the medium are similar, but differ in the separation a t which a test medium begins to diverge from a uniform medium. These results demonstrate that absorptive layers must be considered separately from diffusive layers within a biological material.","PeriodicalId":408657,"journal":{"name":"Proceedings of the 15th Annual International Conference of the IEEE Engineering in Medicine and Biology Societ","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129687911","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}
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