Radiant energy – Invisible radiant energy responsive electric signalling – With or including a luminophor
Patent
1981-01-26
1983-07-26
Anderson, Bruce C.
Radiant energy
Invisible radiant energy responsive electric signalling
With or including a luminophor
250369, G01T 120
Patent
active
043956351
ABSTRACT:
A gamma ray coincidence analysis system for a multichannel nuclear imaging device of the type employing scintillation detectors in ring-like arrays, with the detectors arranged in quadrants of the rings. The scintillation detectors in a ring have output circuits including respective timing discriminators and OR gates, and respective energy discriminators providing delayed energy pulses, and wherein timing pulses from the respective quadrants are fed via the OR gates to the inputs of a four-input coincidence detector without any delay except for a small delay internal to the discriminators and the very small delay of the OR gates. The delay of the energy pulses at the energy discriminators is for an energy validation period of 500 nsec. The output pulse from the coincidence detector is subsequently delayed for a similar period for verification of the energy levels of the two channels causing the coincidence. A data output signal is generated responsive to the concurrence of the delayed coincidence signal and the delayed energy verification pulses.
REFERENCES:
patent: 3772512 (1973-11-01), Lanez
patent: 4031392 (1977-06-01), Girand et al.
patent: 4181855 (1980-01-01), Horrocks
patent: 4217497 (1980-08-01), Daniels
patent: 4284890 (1981-08-01), Thompson
Brooks Rodney A.
Cascio Horace E.
Friauf Walter S.
Sank Victor J.
Anderson Bruce C.
The United States of America as represented by the Department of
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