Radiant energy – Invisible radiant energy responsive electric signalling – With or including a luminophor
Patent
1976-09-14
1978-07-11
Willis, Davis L.
Radiant energy
Invisible radiant energy responsive electric signalling
With or including a luminophor
250363S, G01T 120
Patent
active
041004132
ABSTRACT:
Radiation imaging apparatus includes a scintillation crystal responsive to radiation stimuli for producing light events, and a plurality of photodetectors arranged in a predetermined array relative to the crystal, each of the photodetectors having a light-sensitive surface facing the crystal and being responsive to a light event for producing an output signal. Coupling means associated with each photodetector applies its output signal to coordinate computing circuitry which computes the coordinates of a light event from signals applied thereto.
In one embodiment of the invention, at least one of the coupling means includes a threshold linear gate for applying the output of the photodetector with which the coupling means is associated, to the coordinate computation circuitry only if the input to this particular photodetector exceeds a predetermined threshold. In another embodiment of the invention, the coupling means specifies the region in the crystal within which a light event occurs, and couples to the coordinate computing circuitry only those photodetectors immediately adjacent the light event.
REFERENCES:
patent: 3732419 (1973-05-01), Kulberg et al.
Inbar Dan
Klein Yitzhak
Elscint Ltd.
Sandler Donald M.
Willis Davis L.
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