{"title":"A simulation study of the LETI TTV03 TOF PET scanner","authors":"G. Tzanakos, S. Pavlopoulos","doi":"10.1109/NEBC.1993.404364","DOIUrl":"https://doi.org/10.1109/NEBC.1993.404364","url":null,"abstract":"The authors use a recently developed PET scanner model to simulate certain characteristics of the TTV03 CEA-LETL time-of-flight (TOF) PET scanner. It is found that the TOF resolution for a pair of detectors is 400 ps (FWHM), as compared to 750 ps measured with the TTV03 LETI scanner. The authors calculate the true, random, and noise effective count rates as functions of the lower energy threshold and find good agreement with experimental measurements.<<ETX>>","PeriodicalId":159783,"journal":{"name":"1993 IEEE Annual Northeast Bioengineering Conference","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114266352","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}
{"title":"Follow-up computerized study of Clozaril therapy","authors":"M. T. Ortiz, K. Kozma","doi":"10.1109/NEBC.1993.404357","DOIUrl":"https://doi.org/10.1109/NEBC.1993.404357","url":null,"abstract":"The primary harmful side effect of Clozaril, an antipsychotic agent, is agranulocytosis. An established computerized database was modified and improved to monitor Clozaril patients in New York State Psychiatric Centers. Six centers with a total of 241 patients were monitored from 6/1/1991 to 9/30/1992. White blood cell test results were recorded for each patient. Thirteen patients were found to exhibit signs of agranulocytosis. The pattern of results for each of the 13 patients was examined, indicating that sound courses of action were subsequently taken. Further work is planned to include continued monitoring and age and/or sex based studies.<<ETX>>","PeriodicalId":159783,"journal":{"name":"1993 IEEE Annual Northeast Bioengineering Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129790524","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}
Shin-lchi lzumi, T. Findley, T. Ikai, J. Andrews, M. Daum, N. Chino
{"title":"Facilitatory effect of thinking about movement on motor evoked potentials to transcranial magnetic stimulation of the brain","authors":"Shin-lchi lzumi, T. Findley, T. Ikai, J. Andrews, M. Daum, N. Chino","doi":"10.1109/NEBC.1993.404429","DOIUrl":"https://doi.org/10.1109/NEBC.1993.404429","url":null,"abstract":"Surface electromyographic responses were recorded from 9 human abductor pollicis brevis muscles in response to transcranial magnetic stimulation of the brain. Measurements of MEP (motor evoked potential) amplitude were performed with the subject at rest, thinking about a particular movement, and slightly contracting the muscle. It is shown that thinking about the movement has a facilitatory effect on the evoked potentials to magnetic stimulation of the brain, and that the degree of facilitation in thinking is smaller than in voluntary contraction.<<ETX>>","PeriodicalId":159783,"journal":{"name":"1993 IEEE Annual Northeast Bioengineering Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131065341","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}
M. A. Fisher, P. Yadav, J. Yadav, S. Laxminarayan, D. Kristol, M. Modak
{"title":"A computer assisted receptor mapping approach to the design of anti-AIDS agents directed at HIV reverse transcriptase","authors":"M. A. Fisher, P. Yadav, J. Yadav, S. Laxminarayan, D. Kristol, M. Modak","doi":"10.1109/NEBC.1993.404373","DOIUrl":"https://doi.org/10.1109/NEBC.1993.404373","url":null,"abstract":"The authors take a pharmacophoric approach to the identification of a substrate/inhibitor binding site on HIV-1 RT. A pharmacophore is defined as the spatial arrangement of a set of atoms or groups in a ligand molecule while bound to a given receptor. The pharmacophore's usefulness is in the assumption that a single one exists for a series of compounds binding at the same receptor site. The superposition of a series of substrate and/or inhibitors along a pharmacophoric pattern provides an enzyme excluded volume, which represents a minimum volume requirement for substrate/inhibitors at the receptor binding site. The structure of HIV-1 RT complexed with dsDNA template-primer has been recently described at 7 /spl Aring/ resolution and is currently being extended to 3 /spl Aring/. The combination of crystallographic, pharmacophoric, and existing biochemical and genetic data regarding the substrate binding residues will help to generate an accurate structure of the substrate binding domain of HIV-1 RT and aid in the evaluation of new and specific RT inhibitors.<<ETX>>","PeriodicalId":159783,"journal":{"name":"1993 IEEE Annual Northeast Bioengineering Conference","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134462110","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}
H. Lacker, H. Chaudhry, T. Choi, W. Boda, W. Tapp, S. Reisman, T. Findley, P. Engler
{"title":"Calculation of mechanical energy cost in a simple model of human walking","authors":"H. Lacker, H. Chaudhry, T. Choi, W. Boda, W. Tapp, S. Reisman, T. Findley, P. Engler","doi":"10.1109/NEBC.1993.404392","DOIUrl":"https://doi.org/10.1109/NEBC.1993.404392","url":null,"abstract":"The mathematical equations for evaluating energy losses at knee-lock, heel-strike and due to friction at the ankle, knee and hip joints are developed within the context of a simple coupled pendulum model of human walking. The qualitative as well as quantitative theoretical predictions are in closer agreement with experimental findings during swing phase when these energy losses are taken into account. It has been found that in general the loss of energy at knee-lock and due to frictional forces is negligable compared to the loss of energy that occurs at heel strike.<<ETX>>","PeriodicalId":159783,"journal":{"name":"1993 IEEE Annual Northeast Bioengineering Conference","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132093231","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}
{"title":"Integration of hypertext and object-oriented databases for information retrieval","authors":"G. Rao, V. Balasubramanian, B. A. Suresh","doi":"10.1109/NEBC.1993.404355","DOIUrl":"https://doi.org/10.1109/NEBC.1993.404355","url":null,"abstract":"The authors' work focuses on the advantages of integrating of an object-oriented data model with hypertext, demonstrating its functional relationship to hypertext and the implications for information retrieval.<<ETX>>","PeriodicalId":159783,"journal":{"name":"1993 IEEE Annual Northeast Bioengineering Conference","volume":"398 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113967102","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}
C. Zapanta, E. Liszka, D. Stinebring, S. Deutsch, D. Geselowitz, J. Tarbell
{"title":"Real-time in vitro observation of cavitation on prosthetic heart valves","authors":"C. Zapanta, E. Liszka, D. Stinebring, S. Deutsch, D. Geselowitz, J. Tarbell","doi":"10.1109/NEBC.1993.404378","DOIUrl":"https://doi.org/10.1109/NEBC.1993.404378","url":null,"abstract":"A method for real-time in vitro observation of cavitation on a prosthetic heart valve has been developed. Cavitation of four blood analog fluids (distilled water, aqueous glycerin, aqueous polyacrylamide, and aqueous xanthan gum) has been documented for a Medtronic/Hall prosthetic heart valve operating in a Penn State Electric Assist Device at physiologic conditions. For each fluid, cavity growth and collapse occurred in less than one millisecond. The cavity duration time was found to decrease with increasing atrial pressure at constant aortic pressure and beat rate. From this study, it was concluded that cavitation may also occur in blood.<<ETX>>","PeriodicalId":159783,"journal":{"name":"1993 IEEE Annual Northeast Bioengineering Conference","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126443485","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}