Thermal measuring and testing – Temperature measurement – In spaced noncontact relationship to specimen
Patent
1995-04-03
1997-11-18
DePumpo, Daniel G.
Thermal measuring and testing
Temperature measurement
In spaced noncontact relationship to specimen
374121, 374129, G01J 500
Patent
active
056880502
ABSTRACT:
Disclosed are four improvements in temperature-measuring radiometric equipment. The first improvement is directed to increasing the sensitivity of a radiometer by employing microwave noise power derived from a reference noise source in an amount that corresponds to a temperature higher than that of the specimen, and applying the reference-noise-source-derived microwave noise power as an input to the radiometer for a shorter time than is microwave noise power derived from a specimen. The second improvement is directed to reducing emissivity error by employing open-loop means comprising a microwave circulator for applying microwave noise power generated by at least one resistor thermostatically heated to a temperature in the neighborhood of the temperature of a patient's body tissue back to the body tissue. The third improvement, which is suitable for use in an applicator insertable into a natural opening of a patient's body that is employed in the detection and location of a cancerous lesion, is directed to a microwave radiometer that employs two displaced microwave antennas to measure the temperature difference between two points of a patient's body tissue or other type of specimen. The fourth improvement is directed to radiometric equipment that is combined with mammographic equipment to provide a superior capability for detecting and locating a breast cancer lesion.
REFERENCES:
patent: 3777270 (1973-12-01), Hardy et al.
patent: 4190053 (1980-02-01), Sterzer
patent: 4235107 (1980-11-01), Ludeke et al.
patent: 5149198 (1992-09-01), Sterzer
patent: 5176146 (1993-01-01), Maurice et al.
Sterzer, "Microwave Radiometers for Non-invasive Measurements of Subsurface Tissue Temperatures", Automedica, 1987, vol. 8. pp. 203-211.
Ludeke et al, "Microwave Radiometric System for Biomedical True Temperature and Emissivity Measurements", Journal of Microwave Power, 18(3), 1983, pp. 277-283.
Mawhinney Daniel D.
Sterzer Fred
DePumpo Daniel G.
MMTC Inc.
Seligsohn George J.
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