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IEEE Transactions on Biomedical Engineering

Issue 1 • Date Jan. 1974

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Displaying Results 1 - 25 of 26
  • Table of contents

    Publication Year: 1974, Page(s): c1
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  • IEEE Engineering in Medicine and Biology Group

    Publication Year: 1974, Page(s): c2
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  • Automatic Analysis and Detection of EEG Spikes

    Publication Year: 1974, Page(s):1 - 7
    Cited by:  Papers (28)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2053 KB)

    A method for detecting spikes in the EEG is described. A digital computer is used to perform a detailed analysis of abnormal spikes to obtain quantitative values for spike characteristics and to determine the parameter values to be used in a special-purpose spike detector. This detector is described together with application results. View full abstract»

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  • Induction Thermocoagulation: Thermal Response and Lesion Size

    Publication Year: 1974, Page(s):8 - 12
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1537 KB)

    A model has been formulated for the thermal and biological response of tissue to the thermocoagulation method of stereotactic surgery. The model has been solved numerically for the temperature distribution in the tissue around an implanted cylindrical thermoseed as a function of time during and after induction heating. The tissue thermal damage has been quantified and lesion size has been predicte... View full abstract»

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  • Coherent Optical Recognition and Counting of Reticulated Red Blood Cells

    Publication Year: 1974, Page(s):12 - 20
    Cited by:  Papers (6)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3697 KB)

    A coherent optical data-processing system for identifying and counting blood cells has been developed. Optical Weiner-Kolmogorov (minimum mean-square error) linear filtering is employed to estimate the density per unit area of a given cell type present in a sample blood smear. The Weiner filter is designed to recognize the characteristics of an ensemble of cells of a type rather than specific indi... View full abstract»

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  • A Mathematical Model of the Vagus-Heart Period System in the Cat

    Publication Year: 1974, Page(s):21 - 27
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2187 KB)

    The dynamic relation between changes in heart period and changes in the frequency of stimulation applied to the nerves involved in slowing the heart (vagus nerves) in chloralosed vagotomized cats pretreated with propranolol was investigated in ten cats using time-domain techniques. The strength of the stimuli was such that a sinus rhythm was always maintained. The typical response of heart period ... View full abstract»

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  • Quasi-Linear Position Relationships in Rolling Joints

    Publication Year: 1974, Page(s):28 - 33
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1098 KB)

    The relationship between the angle of joint position and a linear actuation position, together with appropriate torque relationships, is developed for rolling contact joints with offset insertion by first considering more simple situations. The position relationship can be made quasi-linear by a suitable choice of dimensions, a factor which may be of consequence in design studies of orthotic and p... View full abstract»

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  • Conductivity of Sheared Suspensions of Ellipsoidal Particles with Application to Blood Flow

    Publication Year: 1974, Page(s):33 - 43
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2405 KB)

    The change in the electrical conductivity of blood observed in Couette and Poiseuille flow is discussed. Theoretical calculations considering the motion of red cells in Couette flow are presented. The red cells are considered as insulating ellipsoids in a conducting medium (plasma). The cell orientation distribution is used to calculate the change in conductivity with flow. View full abstract»

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  • A Note on the Optical Scattering Characteristics of Whole Blood

    Publication Year: 1974, Page(s):43 - 45
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (815 KB)

    The effect of the cell membrane on the scattering and absorption of light by a red blood cell is investigated theoretically using spherical models. It is shown that although the backscattering cross section varies considerably with cell membrane refractive index, cell membrane has very little to do with other scattering and absorption characteristics in general. View full abstract»

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  • Resonance Absorption of Microwaves by the Human Skull

    Publication Year: 1974, Page(s):46 - 48
    Cited by:  Papers (29)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1039 KB)

    Resonance absorption of microwaves by the human skull is examined by making computerized calculations of theoretical models of the skull. The calculated relative absorption versus frequency is plotted and compared for homogeneous and inhomogeneous skull models. At a frequency of maximum power absorption, the spatial distribution of intracranial field intensity (based upon the theoretical model) is... View full abstract»

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  • Ultrasound Dosage for Nontherapeutic Use on Human Beings - Extrapolations from a Literature Survey

    Publication Year: 1974, Page(s):48 - 51
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1384 KB)

    A practical method for analyzing the biological effects of nontherapeutic ultrasound was applied to the data of 21 different principal investigators. The data were compiled so that individual investigators could develop tentative guidelines of their own regarding the hazards of diagnostic ultrasound in human beings. One set of guidelines developed suggested that exposures of minimal hazard lie bel... View full abstract»

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  • Effect of Inhomogeneities on Surface Signals Coming from a Cerebral Current-Dipole Source

    Publication Year: 1974, Page(s):52 - 54
    Cited by:  Papers (21)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (627 KB)

    A three-sphere model is used to investigate the effects of inhomogeneities introduced by the scalp and the skull on the apparent location and magnitude of a current dipole representing local activity in the brain. The magnitude of the dipole is found to decrease by a proportion of 40 percent, whereas the location of the dipole appears 35 percent more centric. View full abstract»

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  • Comparison of Statistical Errors of the Median and Average Evoked Responses

    Publication Year: 1974, Page(s):54 - 56
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (878 KB)

    It has previously been demonstrated that the median evoked response (MER) is appreciably less sensitive than the average evoked response (AER) to large artifactual disturbances [2]. It is shown here that for Gaussian noise, with artifactual noise absent, the confidence intervals of the median and average are comparable. View full abstract»

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  • A Device for the Calculation of dP/dt/P with Internal Calibration

    Publication Year: 1974, Page(s):56 - 60
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1123 KB)

    An analog method for the calculation of dP/dt/P is described that in-corporates a means for internal calibration. Engineering tests of this device are reported as well as tests using pressures from the left ventricle of swine (20-25 Kgm). Interventions included inflation of a balloon in the inferior vena cava (peak pressure reduced by 50 percent), occlusion of the aorta (peak pressure increased by... View full abstract»

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  • Low-Drain EEG Amplifier

    Publication Year: 1974, Page(s):60 - 61
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (436 KB)

    A low-current-drain low-noise amplifier suitable for long-life implanted transmitters is described. Frequency-response curves are given that show how to tailor the response. A voltage-controlled oscillator (VCO) suitable for connection to an RF transmitter is also described. View full abstract»

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  • A Function Generator for Neurophysiological Applications

    Publication Year: 1974, Page(s):62 - 63
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (679 KB)

    A function generator is described that basically generates a trapezoidal waveform whose leading and trailing ramps and positive and negative plateaus can be varied in duration, independently, between 0.5 ms and 50 s. By appropriate interconnections between the constituent units of the generator, a total of 12 different waveforms are generated, including triangular, sinusoidal, square, rectangular,... View full abstract»

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  • Design of Gateable Transmitter for Acoustic Telemetering Tags

    Publication Year: 1974, Page(s):63 - 66
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1323 KB)

    A single-transistor class B oscillator was designed as a gateable transmitter stage for ultrasonic tags. The transmitting efficiency was analyzed by grouping the various losses into two categories: collector circuit losses to determine the collector efficiency; and load circuit losses to determine the load efficiency. The collector efficiency, 58.5 percent for this design, is a function of the int... View full abstract»

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  • An Electropneumatic Weight Applicator for Stimulating the Slowly Adapting Mechanoreceptors in the Cat's Footpads

    Publication Year: 1974, Page(s):66 - 67
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (838 KB)

    A device is described for precise stimulation of the slowly adapting mechanoreceptors in the cat's footpads. At a preset delay following the arrival of an external triggering pulse, a selected weight in the range 50 gm-2 kgm is applied for a preset duration, then lifted pneumatically. A displacement transducer provides a voltage signal proportional to the displacement of the weight. View full abstract»

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  • Random Time-Interval Generator

    Publication Year: 1974, Page(s):68 - 70
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (868 KB)

    A solid-state device utilizing TTL logic circuitry is described that produces a randomly timed series of pulses. View full abstract»

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  • Airflow Determination in a Horizontal Laminar Airflow Operating Room

    Publication Year: 1974, Page(s):70 - 73
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1130 KB)

    The criteria used in the selection of a laminar airflow unit are presented. The unit acquired and installed is described. The air-velocity profiles are shown for the empty and occupied operating room, and the method for their determination is described. The study of the velocity profiles indicated the unit operated to the manufacturer's description and met the needs for a particular operating room... View full abstract»

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  • Computer Detection of Distortion in Arterial Pressure Signals

    Publication Year: 1974, Page(s):73 - 75
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (953 KB)

    An application of the mathematical concept of curvature to the detection of distortion in arterial pressure signals is described. Curvature is defined and examples of digitally filtered pressure tracings show the relationship between curvature and the degree of damping. Even though curvature is also a function of the cardiovascular system producing the signal, the average sum of curvature can gene... View full abstract»

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  • Mechanical Damping of the Manometric System Used in the Pressure Gradient Technique

    Publication Year: 1974, Page(s):76 - 78
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1775 KB)

    A simple method for introducing mechanical damping in catheter-manometer systems so that a flat frequency response throughout 30 Hz can be realized easily is described. This allows reliable computation of instantaneous blood velocity by the pressure gradient technique, since the bandwidth available, dc to 22 Hz, allows accurate recording of the pressure gradient, even when long catheters are used.... View full abstract»

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  • Contributors

    Publication Year: 1974, Page(s):78 - 79
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    Freely Available from IEEE
  • A look to your future IEEE Can Help You Stay Current Technically Through Groups and Societies

    Publication Year: 1974, Page(s): 80
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  • IEEE Transactions on Biomedical Engineering Statement of Editorial Policy

    Publication Year: 1974, Page(s): 80-a
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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
University of Minnesota