Radiant energy – Invisible radiant energy responsive electric signalling – With or including a luminophor
Patent
1983-11-28
1986-05-27
Smith, Alfred E.
Radiant energy
Invisible radiant energy responsive electric signalling
With or including a luminophor
250369, G01T 120
Patent
active
045917205
ABSTRACT:
The present invention relates to a method of measuring radioactivity which is suitable for discriminating between surface and internal contaminations of a body.
The radioactivity of a subject is measured to obtain a .gamma.-ray energy spectrum of radioactivity signals obtained thereby, and a discrimination between surface and internal contamination of the subject is performed on the basis of the ratio between a photoelectric effect component and a Compton-scattered component of the .gamma.-ray energy spectrum.
According to the present invention, surface and internal contaminations can be clearly identified.
REFERENCES:
patent: 3412249 (1968-11-01), Hanken
patent: 3876882 (1975-04-01), Todd
patent: 4081682 (1978-03-01), Ohlenshlager
patent: 4342916 (1982-08-01), Jatteau et al.
patent: 4423522 (1983-12-01), Harding
patent: 4453075 (1984-06-01), Mattsson et al.
Fuji Masaaki
Izumi Yuichi
Kitaguchi Hiroshi
Hanig R.
Hitachi , Ltd.
Smith Alfred E.
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