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[1990] Proceedings. Third Annual IEEE Symposium on Computer-Based Medical Systems最新文献

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A graphical display system for animating mapped cardiac potentials 一种用于绘制心脏电位的图形显示系统
[1990] Proceedings. Third Annual IEEE Symposium on Computer-Based Medical Systems Pub Date : 1990-06-03 DOI: 10.1109/CBMSYS.1990.109400
C. Laxer, R. Ideker, William M. Smith, P. Wolf, E. V. Simpson
{"title":"A graphical display system for animating mapped cardiac potentials","authors":"C. Laxer, R. Ideker, William M. Smith, P. Wolf, E. V. Simpson","doi":"10.1109/CBMSYS.1990.109400","DOIUrl":"https://doi.org/10.1109/CBMSYS.1990.109400","url":null,"abstract":"A graphical display system for animating mapped cardiac potentials is described. The system displays recorded voltages from 121 epicardial electrodes simultaneously on a computer monitor using color to indicate the magnitude of the voltage. Numerous options accessible through the mouse-driven user interface provide the user with a high degree of interaction with the data. The user can observe the changes in the recorded voltages over time by defining a portion of the data over which to animate the voltages. Animation speeds of up to 2 1/4 frames per second can be achieved, depending on the workstation used. Use of the graphical display system provides a new tool for studying the electrical conduction properties of the heart. Through its use, a more complete understanding (and potentially a more effective treatment) of arrhythmias might be achieved.<<ETX>>","PeriodicalId":365366,"journal":{"name":"[1990] Proceedings. Third Annual IEEE Symposium on Computer-Based Medical Systems","volume":"5 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131672493","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: 13
Twelve-lead simulation for testing interpretive ECG machines 解释性心电图机试验用十二导联模拟
[1990] Proceedings. Third Annual IEEE Symposium on Computer-Based Medical Systems Pub Date : 1990-06-03 DOI: 10.1109/CBMSYS.1990.109397
W. J. Tompkins, S. Luo
{"title":"Twelve-lead simulation for testing interpretive ECG machines","authors":"W. J. Tompkins, S. Luo","doi":"10.1109/CBMSYS.1990.109397","DOIUrl":"https://doi.org/10.1109/CBMSYS.1990.109397","url":null,"abstract":"A 12-led electrocardiogram (ECG) simulator for producing realistic signals that are useful for testing interpretive ECG machines has been developed. The simulator synthesizes about 100 12-lead ECGs with different morphological characteristics and rhythms. The operator can control the heart rate and the amplitudes of a sinusoidal baseline drift function, a pseudorandom noise source, and 60-Hz interference. The simulator, written in the C programming language on an IBM PC, provides the ECG signals through a multichannel digital-to-analog converter.<<ETX>>","PeriodicalId":365366,"journal":{"name":"[1990] Proceedings. Third Annual IEEE Symposium on Computer-Based Medical Systems","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131678753","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
A continuum model of activity waves in layered neuronal networks: computer models of brain-stem seizures 层状神经元网络活动波的连续模型:脑干癫痫发作的计算机模型
[1990] Proceedings. Third Annual IEEE Symposium on Computer-Based Medical Systems Pub Date : 1990-06-03 DOI: 10.1109/CBMSYS.1990.109443
P. Koch, G. Leisman
{"title":"A continuum model of activity waves in layered neuronal networks: computer models of brain-stem seizures","authors":"P. Koch, G. Leisman","doi":"10.1109/CBMSYS.1990.109443","DOIUrl":"https://doi.org/10.1109/CBMSYS.1990.109443","url":null,"abstract":"A model of dysfunctional brain-stem activity as nonlinear homogeneous disturbances in a structure consisting of excitatory and inhibitory layers is presented. Cortical EEG traces are identified with the time derivative of the active fraction of excitatory cells. Increase in the time delay between the layers causes the onset of periodic nonlinear oscillations. Change in the biochemical state can cause rapid oscillations similar to seizures.<<ETX>>","PeriodicalId":365366,"journal":{"name":"[1990] Proceedings. Third Annual IEEE Symposium on Computer-Based Medical Systems","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130618854","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
Refinement of medical knowledge bases: a neural network approach 医学知识库的细化:一种神经网络方法
[1990] Proceedings. Third Annual IEEE Symposium on Computer-Based Medical Systems Pub Date : 1990-06-03 DOI: 10.1109/CBMSYS.1990.109411
L. Fu
{"title":"Refinement of medical knowledge bases: a neural network approach","authors":"L. Fu","doi":"10.1109/CBMSYS.1990.109411","DOIUrl":"https://doi.org/10.1109/CBMSYS.1990.109411","url":null,"abstract":"One important issue in designing medical knowledge-based systems is the management of uncertainty. Among the schemes that have been developed for this purpose, probability and CF (certainty factor) are the most widely used. If rules are organized according to a connectionist model, then neural network learning suggests a promising solution to this problem. When most rules are correct, semantically incorrect rules can be recognized if their associated certainty factors are weakened or change signs after training with correct samples. The techniques for rule base refinement are examined under this approach. The concept has been implemented and tested in an actual medical expert system.<<ETX>>","PeriodicalId":365366,"journal":{"name":"[1990] Proceedings. Third Annual IEEE Symposium on Computer-Based Medical Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130681828","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
Noise in reconstructed images in tomography parallel, fan and cone beam projections 层析成像中平行、扇形和锥束投影重建图像中的噪声
[1990] Proceedings. Third Annual IEEE Symposium on Computer-Based Medical Systems Pub Date : 1990-06-03 DOI: 10.1109/CBMSYS.1990.109382
Harish P. Hiriyannaiah, W. Snyder, G. Bilbro
{"title":"Noise in reconstructed images in tomography parallel, fan and cone beam projections","authors":"Harish P. Hiriyannaiah, W. Snyder, G. Bilbro","doi":"10.1109/CBMSYS.1990.109382","DOIUrl":"https://doi.org/10.1109/CBMSYS.1990.109382","url":null,"abstract":"A principle source of noise in X-ray and emission computer tomography is at the detectors that measure the projection of the object. The noise can be approximated by additive, signal-independent white Gaussian statistics by ignoring the negligible effects of scattering and diffraction of the source beam. The back-projection filter that is used significantly alters power spectral density of the noise, such that the back-projected noise at each reconstructed point is no longer white. However, to effectively restore the reconstructed image using maximum a posteriori techniques via mean field annealing (MFA), a reasonable estimate of the autocorrelation of the back-projected noise is necessary. This work derives the autocorrelation and power spectra of the reconstructed noise for parallel, fan, and cone beam projections and also shows some preliminary results of MFA restorations.<<ETX>>","PeriodicalId":365366,"journal":{"name":"[1990] Proceedings. Third Annual IEEE Symposium on Computer-Based Medical Systems","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134503585","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
Time-domain analysis of magnetic resonance spectra and chemical shift images 磁共振光谱和化学位移图像的时域分析
[1990] Proceedings. Third Annual IEEE Symposium on Computer-Based Medical Systems Pub Date : 1990-06-03 DOI: 10.1109/CBMSYS.1990.109430
L. D. Canady, R. Jordan, A. Asgharzadeh, G. Abousleman, D. Koechner, R. Griffey
{"title":"Time-domain analysis of magnetic resonance spectra and chemical shift images","authors":"L. D. Canady, R. Jordan, A. Asgharzadeh, G. Abousleman, D. Koechner, R. Griffey","doi":"10.1109/CBMSYS.1990.109430","DOIUrl":"https://doi.org/10.1109/CBMSYS.1990.109430","url":null,"abstract":"The utility of adaptive prediction and filtering algorithms and the autocorrelation-based Yule-Walker algorithm to predict and filter complex NMR (nuclear magnetic resonance) data is demonstrated. The application of these methods improves the available signal-to-noise ratio using time-domain analysis, and increases the low resolution via prediction algorithms in data containing phase errors introduced by hardware limitations. The application of the complex least-mean-squares and the modified-least-mean-squares transversal and lattice algorithms to low- and high-resolution NMR data records is demonstrated. The resolution and windowing problems found in the discrete Fourier transform are overcome by these alternative methods.<<ETX>>","PeriodicalId":365366,"journal":{"name":"[1990] Proceedings. Third Annual IEEE Symposium on Computer-Based Medical Systems","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133580234","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
Electronics for the electrohydraulic total artificial heart 电子学用于电液全人工心脏
[1990] Proceedings. Third Annual IEEE Symposium on Computer-Based Medical Systems Pub Date : 1990-06-03 DOI: 10.1109/CBMSYS.1990.109442
K. D. Smith, G. Bearnson, Hee Chan Kim, R. Layton, R. D. Jarmin, J. Smith
{"title":"Electronics for the electrohydraulic total artificial heart","authors":"K. D. Smith, G. Bearnson, Hee Chan Kim, R. Layton, R. D. Jarmin, J. Smith","doi":"10.1109/CBMSYS.1990.109442","DOIUrl":"https://doi.org/10.1109/CBMSYS.1990.109442","url":null,"abstract":"The electronics and microcontroller software which comprise the electrohydraulic total artificial heart (EHTAH) are described. The power, communication, control and monitoring (PCCM) subsystem consists of an external controller (IBM PC), a transcutaneous transmission system (TTS), an internal electronic system, and energy converters (composed of motors and axial flow pumps). Software for the external controller is described in addition to the firmware for the internal controller microcontrollers.<<ETX>>","PeriodicalId":365366,"journal":{"name":"[1990] Proceedings. Third Annual IEEE Symposium on Computer-Based Medical Systems","volume":"48 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130013970","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
Use of relational database on the health and Radon case-control study 关系数据库在健康与氡病例对照研究中的应用
[1990] Proceedings. Third Annual IEEE Symposium on Computer-Based Medical Systems Pub Date : 1990-06-03 DOI: 10.1109/CBMSYS.1990.109438
Richard E. Gress, J. Lyon
{"title":"Use of relational database on the health and Radon case-control study","authors":"Richard E. Gress, J. Lyon","doi":"10.1109/CBMSYS.1990.109438","DOIUrl":"https://doi.org/10.1109/CBMSYS.1990.109438","url":null,"abstract":"The Radon Study is a case-control study of 775 cases and 1125 controls. It will reconstruct the adult life residential history of each subject. When the study was conceived, it was evident that the data required would be extensive and complex; a relational database management system (DBMS) was needed. Because of prior experience with Ingres, it was chosen. Additional software to support telephone interviewing in a real-time system was developed and interfaced with Ingres. The current hardware configuration includes a Microvax II running VMS; it has 6 MB of memory and 200 MB of hard disk. All software has been ported to an Everex 386 and a Sun 386i, each running PC Ingres DBMS.<<ETX>>","PeriodicalId":365366,"journal":{"name":"[1990] Proceedings. Third Annual IEEE Symposium on Computer-Based Medical Systems","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125115221","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
Electrocardiogram compression using lapped orthogonal transform 利用叠置正交变换进行心电图压缩
[1990] Proceedings. Third Annual IEEE Symposium on Computer-Based Medical Systems Pub Date : 1990-06-03 DOI: 10.1109/CBMSYS.1990.109405
N. Ta, Y. Attikiouzel, G. Crebbin
{"title":"Electrocardiogram compression using lapped orthogonal transform","authors":"N. Ta, Y. Attikiouzel, G. Crebbin","doi":"10.1109/CBMSYS.1990.109405","DOIUrl":"https://doi.org/10.1109/CBMSYS.1990.109405","url":null,"abstract":"The results of a study to examine the feasibility of electrocardiogram (ECG) data compression using the lapped orthogonal transform (LOT) are presented. The blocking effects in the reconstructed signal are shown to be reduced, while the bit rate and the performance of the proposed scheme remain the same, as compared with the traditional discrete cosine transform. A fast computing algorithm of the LOT adaptable for VLSI architectures is described.<<ETX>>","PeriodicalId":365366,"journal":{"name":"[1990] Proceedings. Third Annual IEEE Symposium on Computer-Based Medical Systems","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114308546","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 microcomputer based image analysis system for the left ventricle and the coronary artery 基于微机的左心室和冠状动脉图像分析系统
[1990] Proceedings. Third Annual IEEE Symposium on Computer-Based Medical Systems Pub Date : 1990-06-03 DOI: 10.1109/CBMSYS.1990.109401
Zhong-quan Wu, Yan Guo
{"title":"A microcomputer based image analysis system for the left ventricle and the coronary artery","authors":"Zhong-quan Wu, Yan Guo","doi":"10.1109/CBMSYS.1990.109401","DOIUrl":"https://doi.org/10.1109/CBMSYS.1990.109401","url":null,"abstract":"A microcomputer-based image analysis system for the left ventricle is introduced. This system is based on an IBM-PC/AT microcomputer as a host with an image processing subsystem. The configurations of the hardware and the software of the system are presented, followed by the functions and main features of the system. In addition, a contour detection method using the dynamic programming is developed for the left ventricle. Finally, applications to routine images are presented. The experimental results show the efficacy and efficiency of present system.<<ETX>>","PeriodicalId":365366,"journal":{"name":"[1990] Proceedings. Third Annual IEEE Symposium on Computer-Based Medical Systems","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114181868","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
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