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Proceedings of the 2nd International Conference on Bioelectromagnetism (Cat. No.98TH8269)最新文献

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Cochlear implant threshold changes at high electric stimulus pulse rates 高电刺激脉冲率下人工耳蜗阈值的变化
Proceedings of the 2nd International Conference on Bioelectromagnetism (Cat. No.98TH8269) Pub Date : 1998-02-15 DOI: 10.1109/ICBEM.1998.666423
B. Lithgow
{"title":"Cochlear implant threshold changes at high electric stimulus pulse rates","authors":"B. Lithgow","doi":"10.1109/ICBEM.1998.666423","DOIUrl":"https://doi.org/10.1109/ICBEM.1998.666423","url":null,"abstract":"Inferior colliculus (IC) units have a significantly lower stimulus threshold when driven with a cochlear implant using bipolar stimuli at high (2 k pulses/s) compared to low (125 pulse/s) pulse rates. At high pulse rates temporal summation is used to explain this threshold shift.","PeriodicalId":213764,"journal":{"name":"Proceedings of the 2nd International Conference on Bioelectromagnetism (Cat. No.98TH8269)","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115396805","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
Spectral analysis of bioelectric signals by adapted wavelet transforms 基于自适应小波变换的生物电信号频谱分析
Proceedings of the 2nd International Conference on Bioelectromagnetism (Cat. No.98TH8269) Pub Date : 1998-02-15 DOI: 10.1109/ICBEM.1998.666369
U. Wiklund, M. Akay
{"title":"Spectral analysis of bioelectric signals by adapted wavelet transforms","authors":"U. Wiklund, M. Akay","doi":"10.1109/ICBEM.1998.666369","DOIUrl":"https://doi.org/10.1109/ICBEM.1998.666369","url":null,"abstract":"In this study we use the adapted wavelet transform methods (wavelet and cosine packets) for spectral analysis of bioelectric signals. These methods have recently been introduced for analysis of non-stationary signals. Using recordings of the heart rate variability in twenty healthy subjects, the estimated power in different frequency bands is compared to results based on the classical methods: fast Fourier transform and autoregressive modelling. The results showed that cosine packets gave similar results to classical methods, and may be preferred to characterise the rhythmic components in the recorded signals. On the other hand, the non-stationary fluctuations, i.e., the \"trend\", was efficiently decomposed using the wavelet transform method.","PeriodicalId":213764,"journal":{"name":"Proceedings of the 2nd International Conference on Bioelectromagnetism (Cat. No.98TH8269)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125500198","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
Analysis of the diurnal variation of arterial pressure waves 动脉压波的日变化分析
Proceedings of the 2nd International Conference on Bioelectromagnetism (Cat. No.98TH8269) Pub Date : 1998-02-15 DOI: 10.1109/ICBEM.1998.666455
I. Rauchberger, M. Cohen, A. Dart
{"title":"Analysis of the diurnal variation of arterial pressure waves","authors":"I. Rauchberger, M. Cohen, A. Dart","doi":"10.1109/ICBEM.1998.666455","DOIUrl":"https://doi.org/10.1109/ICBEM.1998.666455","url":null,"abstract":"Pulse pressure waves (PPWs) were recorded from the radial artery using photoplethysmography in 7 healthy subjects (6M, 1F, mean age 23 yrs) at rest every 3 hours between 9 am and 6 pm. Analysis of variations of PPWs included sum of square differences between waves, ANOVA and spectral analysis of the components of waves. PPWs recorded at 9am were not significantly different to PPWs recorded at 6 pm, however, PPWs between each other time period were significantly different, with the largest difference occurring between 9 am and 3pm. There was also some variation in the frequency components of the PPWs with an increase in higher frequency components as the day progresses. The finding of this study supports the suggestion within TCM that there are changes in PPW throughout the day.","PeriodicalId":213764,"journal":{"name":"Proceedings of the 2nd International Conference on Bioelectromagnetism (Cat. No.98TH8269)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124077344","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
Modeling the volume conductor-double Fourier series approximation versus spherical harmonic expansion 体积导体的建模——双傅立叶级数近似与球谐展开
Proceedings of the 2nd International Conference on Bioelectromagnetism (Cat. No.98TH8269) Pub Date : 1998-02-15 DOI: 10.1109/ICBEM.1998.666367
G. Lafer, P. Wach, B. Tilg
{"title":"Modeling the volume conductor-double Fourier series approximation versus spherical harmonic expansion","authors":"G. Lafer, P. Wach, B. Tilg","doi":"10.1109/ICBEM.1998.666367","DOIUrl":"https://doi.org/10.1109/ICBEM.1998.666367","url":null,"abstract":"A method for parametric description of boundary surfaces based on combined second order surface and double Fourier series approximation is presented. Gauss transformation is used to determine the best fitting parameters. The method is applied to approximate the conductivity interfaces of volume conductor models needed for solving the bioelectromagnetic forward and inverse problem. The attained quality of fit was compared to that obtained applying the surface harmonic expansion for modeling the volume conductor shape. In that case, the coefficients of expansion are found by nonlinear least-squares fit.","PeriodicalId":213764,"journal":{"name":"Proceedings of the 2nd International Conference on Bioelectromagnetism (Cat. No.98TH8269)","volume":"121 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117306725","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
ECG noise cancellation using digital filters 使用数字滤波器消除心电噪声
Proceedings of the 2nd International Conference on Bioelectromagnetism (Cat. No.98TH8269) Pub Date : 1998-02-15 DOI: 10.1109/ICBEM.1998.666440
H. Gholamhosseini, H. Nazeran, K. Reynolds
{"title":"ECG noise cancellation using digital filters","authors":"H. Gholamhosseini, H. Nazeran, K. Reynolds","doi":"10.1109/ICBEM.1998.666440","DOIUrl":"https://doi.org/10.1109/ICBEM.1998.666440","url":null,"abstract":"A digital filter structure is proposed to maximally remove noise from the ECG signals. This structure is based on cascading a zero-phase bandpass, an adaptive filter, and multi-band-pass filter. It provides an efficient method for removing noise from the ECG signals. This filter structure has low implementation complexity and introduces little noise into a typical ECG. It can be applied to real-time applications particularly automatic cardiac arrhythmia classifiers.","PeriodicalId":213764,"journal":{"name":"Proceedings of the 2nd International Conference on Bioelectromagnetism (Cat. No.98TH8269)","volume":"2018 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122889639","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: 49
Prediction of carotid pressure waveforms by mathematical transformation of pressure waves recorded from the radial artery 通过对桡动脉记录的压力波进行数学变换预测颈动脉压力波形
Proceedings of the 2nd International Conference on Bioelectromagnetism (Cat. No.98TH8269) Pub Date : 1998-02-15 DOI: 10.1109/ICBEM.1998.666443
I. Rauchberger, A. Dart, M. Cohen
{"title":"Prediction of carotid pressure waveforms by mathematical transformation of pressure waves recorded from the radial artery","authors":"I. Rauchberger, A. Dart, M. Cohen","doi":"10.1109/ICBEM.1998.666443","DOIUrl":"https://doi.org/10.1109/ICBEM.1998.666443","url":null,"abstract":"Radial pressure waves (RPWs) and carotid pressure waves (CPWs) were recorded using applanation tonometry in 6 healthy subjects (5M, 1F, all aged 21 yrs) at rest as well as after a vasodilator agent (sublingual glyceryl trinitrate [GTN] spray). For each subject, transfer functions between radial and carotid pressure waves were calculated by a nonparametric Fourier method. Using the transfer functions, CPWs were reconstructed from RPWs and compared to tonometrically recorded CPWs. The transfer functions accurately predicted CPWs at rest, however, post-GTN, there were significant differences between reconstructed and recorded CPWs. The timing of peak systolic pressure, as predicted by the reconstructed CPWs, was underestimated by 0.3% at rest and was overestimated by 2.3% post-GTN spray.","PeriodicalId":213764,"journal":{"name":"Proceedings of the 2nd International Conference on Bioelectromagnetism (Cat. No.98TH8269)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115141499","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
Application of the parameters, reflecting ventricular repolarization inhomogeneity for identification of patients with life-threatening arrhythmias 应用反映心室复极不均匀性的参数识别危及生命的心律失常患者
Proceedings of the 2nd International Conference on Bioelectromagnetism (Cat. No.98TH8269) Pub Date : 1998-02-15 DOI: 10.1109/ICBEM.1998.666378
J. Kaik, J. Lass, K. Maigas
{"title":"Application of the parameters, reflecting ventricular repolarization inhomogeneity for identification of patients with life-threatening arrhythmias","authors":"J. Kaik, J. Lass, K. Maigas","doi":"10.1109/ICBEM.1998.666378","DOIUrl":"https://doi.org/10.1109/ICBEM.1998.666378","url":null,"abstract":"The correlation between the parameters reflecting ventricular repolarization inhomogeneity and the results of programmed ventricular stimulation was assessed in 58 post-myocardial infarction patients. Registration of increased QTc interval duration and QT and QTa interval dispersion in patients with high risk of sudden death as compared to the patients without it according to the results of programmed ventricular stimulation (469.5/spl plusmn/43.2 and 435.5/spl plusmn/29.6 ms, 60.2/spl plusmn/23.6 and 43.8/spl plusmn/11.3 ms, 56.71/spl plusmn/27.0 and 33.7/spl plusmn/14.5 ms, respectively) demonstrate the efficacy of this non-invasive method in identification of high-risk subgroup of post-myocardial infarction patients.","PeriodicalId":213764,"journal":{"name":"Proceedings of the 2nd International Conference on Bioelectromagnetism (Cat. No.98TH8269)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125689285","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
Developing a mathematical model which represents magnetic field density around powerlines 建立一个数学模型来表示电力线周围的磁场密度
Proceedings of the 2nd International Conference on Bioelectromagnetism (Cat. No.98TH8269) Pub Date : 1998-02-15 DOI: 10.1109/ICBEM.1998.666446
R.J. Tao, A. Zahedi
{"title":"Developing a mathematical model which represents magnetic field density around powerlines","authors":"R.J. Tao, A. Zahedi","doi":"10.1109/ICBEM.1998.666446","DOIUrl":"https://doi.org/10.1109/ICBEM.1998.666446","url":null,"abstract":"The objective of this paper is to present an accurate and reliable mathematical model which has been developed to determine the strength of magnetic field density in the vicinity of high voltage powerlines. The model has been developed based on measuring the strength of magnetic field around 220 kV powerlines. The accuracy of the model has also been tested in this study.","PeriodicalId":213764,"journal":{"name":"Proceedings of the 2nd International Conference on Bioelectromagnetism (Cat. No.98TH8269)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125711438","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
Is there a link between acupuncture meridians, Earth-ionosphere resonances and cerebral activity? 针灸经络、地球电离层共振和大脑活动之间有联系吗?
Proceedings of the 2nd International Conference on Bioelectromagnetism (Cat. No.98TH8269) Pub Date : 1998-02-15 DOI: 10.1109/ICBEM.1998.666451
M. Cohen, C. Behrenbruch, I. Cosic
{"title":"Is there a link between acupuncture meridians, Earth-ionosphere resonances and cerebral activity?","authors":"M. Cohen, C. Behrenbruch, I. Cosic","doi":"10.1109/ICBEM.1998.666451","DOIUrl":"https://doi.org/10.1109/ICBEM.1998.666451","url":null,"abstract":"Acupuncture points and meridians have been shown to have distinct electrical characteristics. Acupuncture points have been found to have lower electrical impedance and acupuncture meridians represent low resistance pathways. The authors examined the spectral characteristics of a section of the large intestine acupuncture meridian in 10 healthy volunteers by inserting a broad-spectrum pulse at one point and detecting the output response further along the meridian. Analysis of the meridian transfer function revealed characteristic resonant frequencies that strongly coincide with the spectral components of Schumann resonances and the human EEG.","PeriodicalId":213764,"journal":{"name":"Proceedings of the 2nd International Conference on Bioelectromagnetism (Cat. No.98TH8269)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123360319","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
The therapeutic applications of static magnetic fields-a case study 静电磁场的治疗应用-个案研究
Proceedings of the 2nd International Conference on Bioelectromagnetism (Cat. No.98TH8269) Pub Date : 1998-02-15 DOI: 10.1109/ICBEM.1998.666418
D. Wicks, M. Cohen
{"title":"The therapeutic applications of static magnetic fields-a case study","authors":"D. Wicks, M. Cohen","doi":"10.1109/ICBEM.1998.666418","DOIUrl":"https://doi.org/10.1109/ICBEM.1998.666418","url":null,"abstract":"The use of magnetic fields as a therapeutic intervention dates back to antiquity and appears to be undergoing a resurgence. The use of magnets promises to provide a relatively cheap, safe and effective form of therapy, particularly in the treatment of pain and other chronic conditions. The scientific basis for this type of treatment is now well understood and it appears that very little basic or clinical research has been performed in this area. This paper describes how the personal experience of one individual led to the establishment of a company selling magnetic products and the documentation of a large number of anecdotal reports of success of this type of treatment.","PeriodicalId":213764,"journal":{"name":"Proceedings of the 2nd International Conference on Bioelectromagnetism (Cat. No.98TH8269)","volume":"1032 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116462944","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
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