Energy independent uniformity improvement for gamma camera syste

Details Energy independent uniformity improvement for gamma camera syste Energy independent uniformity improvement for gamma camera syste

1977-06-20

1979-02-27

Willis, Davis L.

Radiant energy

Invisible radiant energy responsive electric signalling

With or including a luminophor

250363S, G01T 120

Patent

active

041421027

ABSTRACT:
In a gamma camera system having an array of photomultiplier tubes for detecting scintillation events and preamplifiers connecting each tube to a weighting resistor matrix for determining the position coordinates of the events, means are provided for summing the signals from all photomultipliers to obtain the total energy of each event. In one embodiment, at least two different percentages of the summed voltage are developed and used to change the gain of the preamplifiers as a function of total energy when energies exceed specific levels to thereby obtain more accurate correspondence between the true coordinates of the event and its coordinates in a display.

REFERENCES:
patent: 4071762 (1978-01-01), Lange et al.

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