Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1974-07-22
1976-05-11
Krawczewicz, Stanley T.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
G01R 2704
Patent
active
039566951
ABSTRACT:
The nature of cells such as human or animal cells is identified by means of microwaves. The cells to be identified, as well as normal cells, are interposed respectively into one of two microwave beams thereby to obtain microwave absorption spectra. The two spectra are subtracted from each other preferably by shifting the phase of one beam by 180.degree. so that the two microwave spectra normally cancel each other. The resultant spectrum is detected and may be recorded, or otherwise exhibited by an oscilloscope. Instead of using cells, it is possible to use tissues or slices. It has been found that the thus obtained microwave spectra are characteristic of malignant cells and permit to distinguish, for example, between carcinomas, sarcomas and melanomas. The microwave range may be between 5 and 150 GHz (gigahertz) and preferably the range is between 76 to 86 GHz.
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patent: 3265967 (1966-08-01), Heald
patent: 3439266 (1969-04-01), Rogers
patent: 3711769 (1973-01-01), Peake
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Krawczewicz Stanley T.
Oser Edwin A.
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