Radiant energy – Invisible radiant energy responsive electric signalling – With or including a luminophor
Patent
1993-11-03
1995-02-21
Fields, Carolyn E.
Radiant energy
Invisible radiant energy responsive electric signalling
With or including a luminophor
250366, 250368, G01T 120
Patent
active
053918789
ABSTRACT:
A multiplexed optical fiber readout system is coupled to an array of scintillators, such as BGO crystals, for determining position and energy of radiation events in gamma ray imaging systems. Each scintillator in an N.times.M array is coupled to a pair of step-index-of-refraction, wavelength shifting, fluorescent fibers. The fluorescent fibers are arranged in N rows and M columns (or other indexed scheme) such that each scintillator is coupled to one row fiber and one column fiber, for example. The fluorescent fibers are coupled to clear optical fibers terminating at high quantum efficiency photon counters. Readout of the array of scintillators is accomplished by detecting coincident fluorescent photons in orthogonal pairs of the N+M fibers. By multiplexing the readout on row and column fibers, the number of signal channels is reduced by a factor of (N+M) / (N.times.M), which can greatly reduce cost or increase resolution compared with existing gamma ray imaging systems.
REFERENCES:
patent: 4437007 (1984-03-01), Koslow et al.
patent: 5103099 (1992-04-01), Bourdinaud et al.
patent: 5138165 (1992-08-01), Petroff
patent: 5281820 (1994-01-01), Groh et al.
Fields Carolyn E.
McFarren John C.
Rockwell International Corporation
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