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Proceedings of the IEEE 21st Annual Northeast Bioengineering Conference最新文献

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Total systemic arterial compliance: evaluation of time and frequency domain methods 全身动脉顺应性:时域和频域方法的评价
Proceedings of the IEEE 21st Annual Northeast Bioengineering Conference Pub Date : 1995-05-22 DOI: 10.1109/NEBC.1995.513711
Ying Zhu, Jiwang Dai, J.K. Li
{"title":"Total systemic arterial compliance: evaluation of time and frequency domain methods","authors":"Ying Zhu, Jiwang Dai, J.K. Li","doi":"10.1109/NEBC.1995.513711","DOIUrl":"https://doi.org/10.1109/NEBC.1995.513711","url":null,"abstract":"Systemic arterial compliance is an important determinant of the dynamic arterial load to the left ventricle. Based on linear arterial system models, the authors evaluated commonly used time and frequency domain methods for the calculation of compliance. Results show that accuracy in the assessment of arterial compliance is dependent on the differing approaches for its determination.","PeriodicalId":448427,"journal":{"name":"Proceedings of the IEEE 21st Annual Northeast Bioengineering Conference","volume":"133 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114001665","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: 7
An active, non-linear, model of the leg drop pendulum test: assessing changes in spastic cerebral palsy 一个主动的，非线性的腿垂摆试验模型:评估痉挛性脑瘫的变化
Proceedings of the IEEE 21st Annual Northeast Bioengineering Conference Pub Date : 1995-05-22 DOI: 10.1109/NEBC.1995.513719
J. Fee
{"title":"An active, non-linear, model of the leg drop pendulum test: assessing changes in spastic cerebral palsy","authors":"J. Fee","doi":"10.1109/NEBC.1995.513719","DOIUrl":"https://doi.org/10.1109/NEBC.1995.513719","url":null,"abstract":"Reports on the use of a second order nonlinear system with active force input to model the leg drop pendulum test in spastic cerebral palsy. The model is used as a means of gaining insight into a therapeutic intervention with this population. Optimization techniques are used to adjust model parameters, such that model data fit actual data. Actual data is taken from a set of triplets, two of which have varying degrees of spastic: cerebral palsy and one is without disability. The author compares five sets of data, one from the normal triplet and two each from the subjects with spasticity. Data from the subjects with spasticity is taken before and after vertical stimulation similar to that which one would receive while on horseback. The model parameters show several trends. First, the amplitude of the active forces are reduced to more normal values after vestibular stimulation. Second, the duration of these forces is longer after stimulation than before.","PeriodicalId":448427,"journal":{"name":"Proceedings of the IEEE 21st Annual Northeast Bioengineering Conference","volume":"125 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128370572","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
Development of an impedance spectrometer for tissue ischemia monitoring: application of synchronous sampling principle 组织缺血监测阻抗谱仪的研制:同步采样原理的应用
Proceedings of the IEEE 21st Annual Northeast Bioengineering Conference Pub Date : 1995-05-22 DOI: 10.1109/NEBC.1995.513739
B. Ristic, S. Kun, R.K. Peura
{"title":"Development of an impedance spectrometer for tissue ischemia monitoring: application of synchronous sampling principle","authors":"B. Ristic, S. Kun, R.K. Peura","doi":"10.1109/NEBC.1995.513739","DOIUrl":"https://doi.org/10.1109/NEBC.1995.513739","url":null,"abstract":"The objective of our research Is to develop an impedance spectrometer which will be used for tissue ischemia monitoring. After analyzing the standard methods for complex impedance measurements, a new system realization was proposed. The approach is based on the four electrode impedance measurement method, using synchronous sampling demodulation with one analog channel. Realization of this method, based on the newest generation of highly integrated electronic components for generating sinusoidal signals of arbitrary frequencies, is simple and provides accurate measurements. This approach enables complete microprocessor control of measurements. It has the potential to be fully integrated into a hand-held instrument.","PeriodicalId":448427,"journal":{"name":"Proceedings of the IEEE 21st Annual Northeast Bioengineering Conference","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128377623","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: 8
A new approach to 3D reconstruction in echocardiography based on non-cubic voxels 基于非立方体素的超声心动图三维重建新方法
Proceedings of the IEEE 21st Annual Northeast Bioengineering Conference Pub Date : 1995-05-22 DOI: 10.1109/NEBC.1995.513752
M. Tasler, L. Muller, J. Lethor, Y. Granjon
{"title":"A new approach to 3D reconstruction in echocardiography based on non-cubic voxels","authors":"M. Tasler, L. Muller, J. Lethor, Y. Granjon","doi":"10.1109/NEBC.1995.513752","DOIUrl":"https://doi.org/10.1109/NEBC.1995.513752","url":null,"abstract":"Reconstruction of 3D objects from 2D data is a common problem in many different fields and especially medical imaging, e.g. CT and NMR. Most reconstruction methods presented so far, first define a three-dimensional matrix representing the final volume. In this volume the measured 2D data sets are placed. Then the object is reconstructed by filling the \"empty space\" using different types of interpolation. The results obtained this way are satisfactory, if the 2D data sets are parallel to each other, i.e. if each measured data point can be identified with one element of the 3D matrix. This corresponds to identifying each element of the matrix with one cubic voxel in space. However in some applications the acquired data does not come in parallel slices. In this case the measured points have to be fitted into cubic voxels by interpolation. This however introduces some non-quantifiable error. Furthermore it is not very efficient in terms of CPU time and use of memory. This paper describes a new approach to 3D reconstruction based on non-cubic voxels. It is well adapted to the specific properties of our data acquisition system in echocardiography but can be used with any acquisition system that is based on a rotation.","PeriodicalId":448427,"journal":{"name":"Proceedings of the IEEE 21st Annual Northeast Bioengineering Conference","volume":"251 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133674365","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
Experimentally derived realistic constraints on epicardial potential distributions 实验推导出心外膜电位分布的现实约束
Proceedings of the IEEE 21st Annual Northeast Bioengineering Conference Pub Date : 1995-05-22 DOI: 10.1109/NEBC.1995.513713
D. M. Davenport, D. Brooks, R. Macleod
{"title":"Experimentally derived realistic constraints on epicardial potential distributions","authors":"D. M. Davenport, D. Brooks, R. Macleod","doi":"10.1109/NEBC.1995.513713","DOIUrl":"https://doi.org/10.1109/NEBC.1995.513713","url":null,"abstract":"Spatial and temporal constraints, taking the form of time dependent envelopes and epicardial geometry partitions, respectively, were created from experimental studies of canine epicardial and torso potential map data. Such constraints are of interest in themselves as potential characterisations of in variants and markers of pacing site, induced ischemia, etc., and also may help provide an alternate approach to the inverse problem of electrocardiography.","PeriodicalId":448427,"journal":{"name":"Proceedings of the IEEE 21st Annual Northeast Bioengineering Conference","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121129416","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
A model study of propagation of impulses in cardiac tissue 心脏组织中脉冲传播的模型研究
Proceedings of the IEEE 21st Annual Northeast Bioengineering Conference Pub Date : 1995-05-22 DOI: 10.1109/NEBC.1995.513714
M. Argoubi, L. Leon
{"title":"A model study of propagation of impulses in cardiac tissue","authors":"M. Argoubi, L. Leon","doi":"10.1109/NEBC.1995.513714","DOIUrl":"https://doi.org/10.1109/NEBC.1995.513714","url":null,"abstract":"The bidomain model was used to study the effects of differences in intracellular and extracellular anisotropy on the conduction of impulses in cardiac tissue. Concordant with previous experimental studies the model predicted a higher upstroke velocity and shorter time constant of the foot for action potentials propagating transversely than those propagating longitudinally.","PeriodicalId":448427,"journal":{"name":"Proceedings of the IEEE 21st Annual Northeast Bioengineering Conference","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121302329","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
Follow-up computerized study of prehospital care 院前护理的随访计算机化研究
Proceedings of the IEEE 21st Annual Northeast Bioengineering Conference Pub Date : 1995-05-22 DOI: 10.1109/NEBC.1995.513759
A. M. Stavroulakis, J. Kenny, V. Ortiz, M. T. Ortiz
{"title":"Follow-up computerized study of prehospital care","authors":"A. M. Stavroulakis, J. Kenny, V. Ortiz, M. T. Ortiz","doi":"10.1109/NEBC.1995.513759","DOIUrl":"https://doi.org/10.1109/NEBC.1995.513759","url":null,"abstract":"This follow-up computerized study of Prehospital Care Reports (PCRs), aimed at further improving the quality of care provided by North Shore Rescue Squad (NSRS), a volunteer ambulance squad serving Staten Island, NY, expanded the database of a preliminary 6 month investigation. Information extracted from the data regarding the most common medications reported on the PCRs, and the most frequent geographic response locations, revealed changes in call location concentrations and consistency in medications reported. Distribution of geographic information to NSRS drivers, as well as medication information to all squad members, is a method of attaining the goal of improved prehospital patient care.","PeriodicalId":448427,"journal":{"name":"Proceedings of the IEEE 21st Annual Northeast Bioengineering Conference","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122542827","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
Normal values for median frequency in upper extremity muscles during isometric contraction at 50% of maximal voluntary contraction 在最大自主收缩的50%时，上肢肌肉在等距收缩时的中位频率正常值
Proceedings of the IEEE 21st Annual Northeast Bioengineering Conference Pub Date : 1995-05-22 DOI: 10.1109/NEBC.1995.513724
R. Maniar, S. Reisman, L. Krivickas, A. Taylor
{"title":"Normal values for median frequency in upper extremity muscles during isometric contraction at 50% of maximal voluntary contraction","authors":"R. Maniar, S. Reisman, L. Krivickas, A. Taylor","doi":"10.1109/NEBC.1995.513724","DOIUrl":"https://doi.org/10.1109/NEBC.1995.513724","url":null,"abstract":"Spectral analysis of the electromyogram (EMG) signal is a useful tool for studying the complex phenomena of muscle fatigue. The power density spectrum of the myoelectric signal undergoes a compression towards low frequency as a function of time during a sustained contraction. This compression has been measured using the spectral parameter, median frequency. Normal median frequency values were established for the biceps, triceps and deltoid during a pilot study. The triceps has a lower median frequency slope with fatigue which suggests that this muscle may have more type I fibers (fatigue resistant) than the biceps and deltoids.","PeriodicalId":448427,"journal":{"name":"Proceedings of the IEEE 21st Annual Northeast Bioengineering Conference","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133488168","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
A novel model for source localization on neural substrates 神经基上源定位的新模型
Proceedings of the IEEE 21st Annual Northeast Bioengineering Conference Pub Date : 1995-05-22 DOI: 10.1109/NEBC.1995.513736
X. Yan, Mingui Sun, R. Sclabassi
{"title":"A novel model for source localization on neural substrates","authors":"X. Yan, Mingui Sun, R. Sclabassi","doi":"10.1109/NEBC.1995.513736","DOIUrl":"https://doi.org/10.1109/NEBC.1995.513736","url":null,"abstract":"A new model for source localization on neural substrates is presented, in which the source is assumed to be an ellipsoid rather than a dipole as in the traditional approach. Comparative study shows that the accuracy of source localization is improved significantly through the use of this model.","PeriodicalId":448427,"journal":{"name":"Proceedings of the IEEE 21st Annual Northeast Bioengineering Conference","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133672587","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
A fiber optic chemical sensor 光纤化学传感器
Proceedings of the IEEE 21st Annual Northeast Bioengineering Conference Pub Date : 1995-05-22 DOI: 10.1109/NEBC.1995.513740
M. A. Hughes, A. Drake
{"title":"A fiber optic chemical sensor","authors":"M. A. Hughes, A. Drake","doi":"10.1109/NEBC.1995.513740","DOIUrl":"https://doi.org/10.1109/NEBC.1995.513740","url":null,"abstract":"A fiber optic chemical sensor (FOCS) has been developed for use in conjunction with a chemical polymer membrane whose optical properties change in the presence of hydrogen ions. This instrument was built using lock-in amplifier techniques to measure light intensity reflected from a chemical membrane attached to a bifurcated fiber optic bundle. The device provides an output voltage as a function of pH.","PeriodicalId":448427,"journal":{"name":"Proceedings of the IEEE 21st Annual Northeast Bioengineering Conference","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122307609","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
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