Radiant energy – Invisible radiant energy responsive electric signalling – With or including a luminophor
Patent
1977-07-05
1980-04-29
Willis, Davis L.
Radiant energy
Invisible radiant energy responsive electric signalling
With or including a luminophor
G01T 120
Patent
active
042007933
ABSTRACT:
The present invention is a device for setting a region of interest for a scintillation camera. It is employed for determining whether or not the coordinate signals X and Y which represent the positions of incident gamma rays are located within a specified region which is set by designating arbitrary positions and shape(s) on a rectangular coordinate system provided on the visual field of a camera. This device includes a region setting circuit for discriminating whether the coordinate signals X and Y are located within the specified region through comparison of the potential of the sum of the square of the values of the coordinate signals X and Y with a reference voltage.
REFERENCES:
patent: 3970852 (1976-07-01), Richey et al.
patent: 4013878 (1977-03-01), Wagner
Nagasawa Yasuo
Yamada Jun-ichi
Hitachi Medical Corporation
Willis Davis L.
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