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Title: Body monitoring and imaging apparatus and method

A non-acoustic pulse-echo radar monitor is employed in the repetitive mode, whereby a large number of reflected pulses are averaged to produce a voltage that modulates an audio oscillator to produce a tone that corresponds to the heart motion. The antenna used in this monitor generally comprises two flat copper foils, thus permitting the antenna to be housed in a substantially flat housing. The monitor converts the detected voltage to an audible signal with both amplitude modulation and Doppler effect. It further uses a dual time constant to reduce the effect of gross sensor-to-surface movement. The monitor detects the movement of one or more internal body parts, such as the heart, lungs, arteries, and vocal chords, and includes a pulse generator for simultaneously inputting a sequence of pulses to a transmit path and a gating path. The pulses transmitted along the transmit path drive an impulse generator and provide corresponding transmit pulses that are applied to a transmit antenna. The gating path includes a range delay generator which generates timed gating pulses. The timed gating pulses cause the receive path to selectively conduct pulses reflected from the body parts and received by a receive antenna. The monitor output potential canmore » be separated into a cardiac output indicative of the physical movement of the heart, and a pulmonary output indicative of the physical movement of the lung. 12 figs.« less
Inventors:
Issue Date:
OSTI Identifier:
403661
Assignee:
Univ. of California, Oakland, CA (United States) PTO; SCA: 550600; PA: EDB-97:004638; SN: 96001695599
Patent Number(s):
US 5,573,012/A/
Application Number:
PAN: 8-287,746
Contract Number:
W-7405-ENG-48
Resource Relation:
Other Information: PBD: 12 Nov 1996
Research Org:
University of California
Country of Publication:
United States
Language:
English
Subject:
55 BIOLOGY AND MEDICINE, BASIC STUDIES; MONITORS; DESIGN; MEDICINE; DIAGNOSTIC USES; PHYSIOLOGY

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