# IEEE Transactions on Biomedical Engineering

## Filter Results

Displaying Results 1 - 22 of 22

Publication Year: 1973, Page(s): c1
| |PDF (752 KB)
• ### IEEE Engineering in Medicine and Biology Group

Publication Year: 1973, Page(s): c2
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• ### Mathematical Modeling of Pulmonary Airway Dynamics

Publication Year: 1973, Page(s):397 - 404
Cited by:  Papers (19)
| |PDF (1691 KB)

A mathematical model has been derived that describes the pressure-flow relationship in the ventilatory system under conditions of constant lung volume. The parameters of the model include small airway resistance, large airway resistance, and lung elastic recoil. A collapsible airway segment is included to model compression of the airways during expiration. View full abstract»

• ### On the Feasibility of Closed-Loop Control Of Intra-Aortic Balloon Pumping

Publication Year: 1973, Page(s):404 - 412
Cited by:  Papers (31)  |  Patents (1)
| |PDF (2193 KB)

A closed-loop control scheme for the control of intra-aortic balloon pumping has been developed and tested in dog experiments. A performance index reflecting the general objectives of balloon-assist pumping is developed and a modified steepest ascent control algorithm is utilized for the selection of a proper operating point for the balloon during its pumping cycle. This paper attempts to indicate... View full abstract»

• ### Straight-Line Approximation for the Boundary of the Left Ventricular Chamber from a Cardiac Cineangiogram

Publication Year: 1973, Page(s):413 - 416
Cited by:  Papers (11)  |  Patents (5)
| |PDF (1903 KB)

A cardiac cineangiogram is an X-ray motion picture of the heart. Boundary detection is an essential task to compute valuable quantitative information such as the temporal volume change and the wall velocity. Previously, boundary detection methods treated frames independent of each other. Consecutive frames of a motion picture are, however, highly correlated and therefore this property can be explo... View full abstract»

• ### A Comparative Study of Various Single-Plane Cineangiocardiographic Methods to Measure Left-Ventricular Volume

Publication Year: 1973, Page(s):417 - 421
Cited by:  Papers (3)  |  Patents (1)
| |PDF (1282 KB)

Monoplane angiocardiographic methods are widely used to measure left-ventricular volumes (LVV's). Generally, the ellipsoid and Simpson's rule models are used to calculate LVV. Due to the assumed circular cross-sectional area of the left ventricle, both models have a fundamental error which theoretically prohibits the exact calculation of LVV. In this paper, a method to reduce this fundamental erro... View full abstract»

• ### The Recording of Echocardiograms with an Intensity-Modulated Ink-Jet Oscillograph

Publication Year: 1973, Page(s):421 - 426
Cited by:  Papers (3)
| |PDF (1518 KB)

Echocardiography is today well established and has gained widespread acceptance as a clinical routine method, especially for the diagnosis of mitral valve stenosis. Since heart structure movements are relatively fast, only information of limited medical value can be obtained from direct inspection of the A-scope display. Ideally, an apparatus for recording the movements of heart structures in the ... View full abstract»

• ### Computer Simulation Model for Transient Transcapillary Fluid Exchange

Publication Year: 1973, Page(s):427 - 433
Cited by:  Papers (1)
| |PDF (1607 KB)

The dynamic changes in pressures, flow, and transcapillary fluid exchange which occur in the isolated dog hindlimb in response to a sudden increase in capillary hydrostatic pressure were simulated on a digital computer. The differential equation with time-varying parameters was set in the state-space form and the transient solution was found by means of the matrix exponential technique. The close ... View full abstract»

• ### Effect of Model Complexity and Gait Criteria on the Synthesis of Bipedal Locomotion

Publication Year: 1973, Page(s):433 - 444
Cited by:  Papers (14)
| |PDF (2656 KB)

The control functions, system motions, and other characteristics which are obtained from the mathematical synthesis of optimal'' bipedal locomotion gaits with respect to locomotion criteria (to be minimized) defined in the paper are considered. Results are presented for three mathematical biped models and several locomotion criteria (objective functions). Optimal walking trajectories and associa... View full abstract»

• ### A Nonstationary Analysis of the Electroencephalogram

Publication Year: 1973, Page(s):444 - 452
Cited by:  Papers (32)
| |PDF (2230 KB)

A statistical technique is described which allows description of the statistical characteristics of nonstationary electroencephalograms (EEG's). The EEG is investigated in terms of its nonstationary power spectrum. The instantaneous power spectra of certain transition processes in the EEG (the evolution and blocking of the alpha wave) are calculated and described on the time-frequency plane. View full abstract»

• ### Development of a Digital Spelled-Speech Reading Machine for the Blind

Publication Year: 1973, Page(s):452 - 459
Cited by:  Papers (5)  |  Patents (1)
| |PDF (1957 KB)

This machine uses the one-to-one correspondence between spelled-speech utterances and the printed alphabet symbols. Letter recognition was done by first extracting essential features from the information picked up by a photocell scanner and then matching these features with a stored set of data. In order to reduce the amount of memory required to generate letter sounds, redundant phonemes were eli... View full abstract»

• ### Design Aids for Simple Magnet Systems Useful in Biomedical Applications

Publication Year: 1973, Page(s):459 - 464
Cited by:  Papers (3)  |  Patents (4)
| |PDF (2001 KB)

Design aids to permit the rapid calculation of complete magnet and coil systems are presented. View full abstract»

• ### Threshold 60-Hz Current Required for Ventricular Fibrillation in Subjects of Various Body Weights

Publication Year: 1973, Page(s):465 - 468
Cited by:  Papers (20)
| |PDF (686 KB)

This paper reports the threshold 60-Hz alternating-current values required to induce ventricular fibrillation when the current is applied to electrodes at different sites on the surface of the bodies of rabbits, puppies, one monkey, dogs, goats, and ponies. It is shown that for a given body weight, the duration of exposure to current influences the fibrillation threshold; exposure times shorter th... View full abstract»

• ### A Cardiotachometer which Calculates Rate Digitally

Publication Year: 1973, Page(s):468 - 470
Cited by:  Papers (2)  |  Patents (1)
| |PDF (1685 KB)

A digital beat-to-beat and integrating cardiotachometer which calculates heart rate digitally in a simple manner has been constructed. The device needs no calibration and has an operating range from 1 to 999 beats/min with an accuracy of ±½ digit, and will calculate heart rate either on a beat-to-beat basis or averaged over 10, 20, or 50 beats. View full abstract»

• ### Inductive Neural Stimulator

Publication Year: 1973, Page(s):470 - 472
Cited by:  Papers (4)  |  Patents (1)
| |PDF (740 KB)

A device has been designed and constructed to cause stimulation of neural tissue by means of an induced electric field. Such a device is interesting because it allows a neural structure to be stimulated without requiring either the surgical exposure of the site of stimulation or requiring that current be passed from the outside to the inside of the living system. Tests have been conducted at stimu... View full abstract»

• ### Analog Model of a Passive Myelinated Nerve Fiber

Publication Year: 1973, Page(s):472 - 474
Cited by:  Papers (1)
| |PDF (653 KB)

A model for a passive myelinated nerve fiber has been constructed utilizing an EAI 8800 analog computer. The model is designed to demonstrate the passive spread of a voltage applied to a fiber at a node of Ranvier. View full abstract»

• ### Digital Simulation of an Adaptive System for Long-Term Ventilation of the Lungs

Publication Year: 1973, Page(s):475 - 477
Cited by:  Papers (2)  |  Patents (1)
| |PDF (429 KB)

Digital simulation of a model reference adaptive control scheme for long-term ventilation of the lungs is presented. This adaptive scheme is capable of bringing the instantaneous alveolar pressure of the patient to its normal level within one inspiration period, following a possible change in the patient's respiratory parameters (i.e., airway resistances or lung and chest wall compliances). View full abstract»

• ### Contributors

Publication Year: 1973, Page(s):478 - 480
| |PDF (3608 KB)
• ### 1973 Index IEEE Transactions on Biomedical Engineering Vol. BME-20

Publication Year: 1973, Page(s):480a - 480c
| |PDF (957 KB)
• ### Subject index

Publication Year: 1973, Page(s):480c - 480g
| |PDF (1722 KB)
• ### Membership application

Publication Year: 1973, Page(s): 480-h
| |PDF (182 KB)
• ### New IEEE SOUNDINGS Audio-Tape Cassette Tells All About the Fascinating World of MINICOMPUTERS

Publication Year: 1973, Page(s): 480-i
| |PDF (1156 KB)

## 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