Radiation imaging device having an enlarged uniform field of vie

Details Radiation imaging device having an enlarged uniform field of vie Radiation imaging device having an enlarged uniform field of vie

1993-06-14

1994-08-16

Dzierzynski, Paul M.

Radiant energy

Invisible radiant energy responsive electric signalling

With or including a luminophor

250369, G01T 120

Patent

active

053389379

ABSTRACT:
A radiation imaging device of the type employing a scintillator and a position-sensitive photomultiplier tube eliminates or reduces edge effects and thereby increases the linear field of view by compensating for nonlinearities which distort an image close to the edge. Specifically, (1) a light guide is placed about the edge of the scintillator to channel light that would otherwise be reflected from the edge of scintillator to a light absorbing material so that edge reflected light is not detected by the position-sensitive photomultiplier tube and (2) variable resistors are employed to compensate for distortions in the image caused by current leakage along the edge of the position-sensitive photomultiplier tube.

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Abstract of Moore et al., A Handheld, Lower Power, Gamma Camera: Design Considerations And Initial Results The Journal of Nuclear Medicine (Supplement), vol. 29, No. 5, p. 832, May 1988.
"Crossed Wire Anoes Position-Sensitive Photomultiplier Tubes R2486 Series", Hamamatsu Technical Data Sheet, Oct., 1986.

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