Scintillation camera with improved output means

Details Scintillation camera with improved output means Scintillation camera with improved output means

1976-10-12

1978-01-31

Borchelt, Archie R.

Radiant energy

Invisible radiant energy responsive electric signalling

With or including a luminophor

250363S, G01T 120, G01T 1164

Patent

active

040717623

ABSTRACT:
In a scintillation camera system, the output pulse signals from an array of photomultiplier tubes are coupled to the inputs of individual preamplifiers. The preamplifier output signals are coupled to circuitry for computing the x and y coordinates of the scintillations. A cathode ray oscilloscope is used to form an image corresponding with the pattern in which radiation is emitted by a body. Means for improving the uniformity and resolution of the scintillations are provided. The means comprise biasing means coupled to the outputs of selected preamplifiers so that output signals below a predetermined amplitude are not suppressed and signals falling within increasing ranges of amplitudes are increasingly suppressed. In effect, the biasing means make the preamplifiers non-linear for selected signal levels.

REFERENCES:
patent: 3732419 (1973-05-01), Kulberg et al.
patent: 3851177 (1974-11-01), Van Dijk et al.
patent: 3911278 (1975-10-01), Stout
patent: 3984689 (1976-10-01), Arseneau

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