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Biomedical Engineering, IEEE Transactions on

Issue 1 • Date Jan. 1973

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Displaying Results 1 - 21 of 21
  • Table of contents

    Publication Year: 1973 , Page(s): c1
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    Freely Available from IEEE
  • IEEE Engineering in Medicine and Biology Group

    Publication Year: 1973 , Page(s): c2
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  • Interactive Computer Strategies for Living Nervous System Research

    Publication Year: 1973 , Page(s): 1 - 11
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (3943 KB)  

    New research strategies for living nervous system research are described. These employ rapid interactive computer processes for such basic functions as experiment control, data abstraction, and the on-line interpretation of nervous system functions. View full abstract»

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  • Statistical Analysis of Dynamic Tracer Data

    Publication Year: 1973 , Page(s): 11 - 20
    Cited by:  Papers (6)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2120 KB)  

    Statistical estimation theory is applied to the problem of analyzing data obtained in dynamic tracer studies in nuclear medicine. Procedures are given for the determination of the maximum likelihood (ML), maximum a posteriori probability (MAP), and minimum meansquare-error (MMSE) estimates of parameters describing the transport of the monitored tracer in tissue. Some numerical results are given for data obtained in monitoring the natural decay of strontium-85 and oxygen-15 isotopes frequently used in nuclear medicine. View full abstract»

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  • A Computer Analysis of EEG Spectral Signatures from Normal and Dyslexic Children

    Publication Year: 1973 , Page(s): 20 - 26
    Cited by:  Papers (23)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1732 KB)  

    We have been able to differentiate between 12 dyslexic children and 13 normal age- and sex-matched children on the basis of spectral estimates of their electroencephalograms (EEG's). The children were monitored during various mental tasks and rest situations. Data dimensionality was reduced by ``banding'' various spectral components and eliminating others. The reduced spectral vectors were used as an input to a stepwise discriminant analysis program which, in effect, selected the variables most disparate between the two groups (dyslexic and normal). View full abstract»

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  • Quantification of Hand Tremor in the Clinical Neurological Examination

    Publication Year: 1973 , Page(s): 27 - 37
    Cited by:  Papers (11)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2725 KB)  

    A compensatory tracking task using a visual display and augmented auditory feedback and requiring subjects to maintain a 500-gm force on a control stick has been modified for clinical use. Integrated absolute values of the subjects' force error/second (tremor scores) have been used as a measure of steadiness, and power spectra of the force error have been used to establish the predominant tremor frequencies. Twenty parkinsonian patients, 7 age-matched controls, and 20 young controls have been evaluated, and representative tremor-time records, tremor scores, and tremor-power spectra are presented. The quantitative measures have proven sensitive to individual differences among normals, yet having a dynamic range sufficient to include the most severely afflicted patient tested. Normative values of both tremor scores and predominant tremor frequencies have been established and are significantly different from the parkinsonian values, the parkinsonian patients having a higher average tremor score [8.31 versus 3.76 (gram . seconds/second)] and a lower mean predominant tremor frequency (6.6 Hz versus 7.9 Hz). Representative tremor-power spectra have proven useful in describing physiological and parkinsonian tremors. Reevaluation over 1-3-week intervals indicates that the quantitative measures of tremor scores are reliable (r= 0.83, p < 0.01 for control subjects; r = 0.87, p < 0.01 for parkinsonian patients). In addition, the predominant tremor frequency as measured from the tremor-power spectra is found to be independent of learning effects. It is emphasized that such tests are not designed as diagnostic tools in themselves. View full abstract»

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  • An Implantable Blood Pressure and Flow Transmitter

    Publication Year: 1973 , Page(s): 37 - 43
    Cited by:  Papers (5)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2643 KB)  

    A miniature totally implantable FM/FM telemetry system has been developed to simultaneously measure blood pressure and blood flow, thus providing an appreciation of the hemodynamics of the circulation to the entire body or to a particular organ. Developed for work with animal subjects, the telemetry system's transmission time is controlled by an RF signal that permits an operating life of several months. View full abstract»

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  • An Arrhythmia-Anomalous Beat Monitoring System

    Publication Year: 1973 , Page(s): 43 - 50
    Cited by:  Papers (6)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (3431 KB)  

    An electronic monitoring system has been developed to detect the four conditions that usually lead to fibrillation in the infarcted heart. Artifact-free QRS detection is accomplished by passing the preamplified QRS through a bandpass filter, an automatic gain control (AGC)circuit, a full-wave rectifier, a nonlinear amplifier, and positive and negative slope detectors. High-threshold logic circuitry then applies the timing criteria necessary for positive identification of a QRS complex. A printout of the ECG is made if 1) the number of premature beats in the last minute exceeds a physician-set number (0 through 10), 2) the number of successive anomalous beats (i. e., area increase, QRS increase, or polarity reversal) exceeds a physician-set number (0 through 5), 3) an "early" premature beat occurs (i.e., R-R' < QT), or 4) a multiformal beat is detected (i.e., its morphology differs from that of the previous anomalous beat). View full abstract»

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  • The Specific Resistance of Canine Blood at Body Temperature

    Publication Year: 1973 , Page(s): 51 - 53
    Cited by:  Papers (10)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (852 KB)  

    The specific resistance (¿) of canine blood, having a hematocrit (H) range extending from 0 to 70 percent, was measured at 37°C and 25 kHz using a variable-length conductivity cell connected to a constant-current impedance bridge. A least-squares exponential fit for the experimentally determined dataprovided the relationship ¿= 56.8e0.025H with a correlation coefficient of 0.989. The data obtained were also fitted to the Maxwell-Fricke equation; an excellent fit was obtained in the range of 0-50 percent hematocrit using a form factor of 2.5. View full abstract»

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  • Semiautomatic Quantification of Sharpness of EEG Phenomena

    Publication Year: 1973 , Page(s): 53 - 55
    Cited by:  Papers (17)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (857 KB)  

    A method of semiautomatic quantification of sharpness of EEG phenomena is described. The rectified second derivative of the original EEG tracing is utilized for this purpose and has proven satisfactory in connection with the type of question asked. The method is inexpensive and easy to carry out. View full abstract»

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  • Comments on "Semiautomatic Quantification of Sharpness of EEG Phenomena

    Publication Year: 1973 , Page(s): 55
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    First Page of the Article
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  • Automated Calibration of Blood Pressure Signal Conditioners

    Publication Year: 1973 , Page(s): 55 - 58
    Cited by:  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2138 KB)  

    A system for automatic calibration of blood pressure transducers is described. Automatic calibration is accomplished by activation of an analog-controlled servo system that sets the zero balance and gain in a single sequence. An unlimited number of transducers may be calibrated simultaneously, and calibration is completed within a period of less than 1 min. Accuracy and repeatability are assured without dependence on the operator's judgment. View full abstract»

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  • An Automatic DC-Level Compensation Circuit for Electrophysiology

    Publication Year: 1973 , Page(s): 58 - 60
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (890 KB)  

    A circuit is described that compensates for dc shifts at the input of a high-input impedance preamplifier used for microelectrode recording. The compensation is made by a negative feedback potential in series with the input. Although the whole recording system operates on an ac basis during automatic compensation, dc recording is possible by suspending further changes in the compensation. View full abstract»

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  • A Hybrid Broad-Band EEG Frequency Analyzer for Use in Long-Term Experiments

    Publication Year: 1973 , Page(s): 60 - 62
    Cited by:  Papers (5)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (767 KB)  

    A broad-band EEG frequency analyzer system is described which has been designed for the continuous analysis of experiments lasting several hours. It allows the quantitative measurement of the time course of the effects of various centrally active drugs on the EEG. Analog frequency analysis coupled with digital output provides an efficient means of data collection. Subsequent reduction of data is a accomplished by statistical techniques described elsewhere. View full abstract»

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  • Three-Electrode Probe for Catheter-Type Blood Flowmeters

    Publication Year: 1973 , Page(s): 62 - 63
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (635 KB)  

    A three-electrode probe is described which eliminates the major problem, the transformer EMF, of the present-day ac electromagnetic blood flowmeters. View full abstract»

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  • Modification of an Infrared Spectrophotometer to Study Nerve Excitation

    Publication Year: 1973 , Page(s): 63 - 65
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    A modification to a Perkin-Elmer model 521 infrared spectrophotometer is described which allows a difference spectrum to be obtained from the same sample of a nerve between resting and excited states. Signal processing using time averaging and digital smoothing are employed to improve the signal-to-noise ratio (S/N). View full abstract»

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  • Addendum to ``A Review on Mathematical Models of the Human Thermal System''

    Publication Year: 1973 , Page(s): 65 - 66
    Cited by:  Papers (5)
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    This short communication is intended to supplement the list of references included in a previous review on the subject. View full abstract»

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  • Abstracts of dissertations

    Publication Year: 1973 , Page(s): 67 - 69
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    Freely Available from IEEE
  • Keyword abstracts

    Publication Year: 1973 , Page(s): 70 - 71
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  • Contributors

    Publication Year: 1973 , Page(s): 72 - 74
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    Freely Available from IEEE
  • Membership Application for the IEEE Engineering in Medicine and Biology Group

    Publication Year: 1973 , Page(s): 75
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    Freely Available from IEEE

Aims & Scope

IEEE Transactions on Biomedical Engineering contains basic and applied papers dealing with biomedical engineering. Papers range from engineering development in methods and techniques with biomedical applications to experimental and clinical investigations with engineering contributions.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Bin He
Department of Biomedical Engineering