Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1973-08-09
1976-01-13
Smith, Alfred E.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
324 5R, G01R 3308
Patent
active
039328058
ABSTRACT:
This invention relates to a method of obtaining internal information of the body to be investigated (target) by the application to the target of a nuclear magnetic resonance phenomenon, in which the measuring target is placed in a homogeneous magnetic field Ho and a static or scanning magnetic field H.sub.s is superimposed on the homogenous magnetic field Ho within a specified area of the target; from the inside or outside thereof. A high frequency field H.sub.1 of a frequency determined by the static field H.sub.o +.DELTA.H.sub.s in the measuring target area (MT) is applied uniformly to the body thereby obtaining information of a nuclear magnetic substance disposed within the specified area of the body, i.e., the measuring target in accordance with detection of a resonance frequency defined by H.sub.o +.DELTA.H.sub.s. Alternatively, the scanning field .DELTA.H.sub.s may be applied to the body only outside of the target region and a resonance frequency defined by H.sub.o only then is detected as to the target MT. The high frequency field may be constant or pulsed.
REFERENCES:
patent: 3419793 (1968-12-01), Genthe
patent: 3775671 (1973-11-01), Brown
patent: 3789832 (1974-02-01), Damadian
Abe Zenuemon
Hotta Masao
Imai Masaaki
Tanaka Kunio
Kichizo Niwa
Smith Alfred E.
Tokar Michael J.
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