Question

Which of the following components adds all the signals and determines where each scintillation event occurred in the detector?

(a) Collimator

(b) Detector crystal

(c) Photo multiplier tubes

(d) Position circuitry

This question was posed to me at a job interview.

This intriguing question comes from Gamma Camera topic in division Radiochemical Techniques of Analytical Instrumentation

Answer 1

The correct answer is (d) Position circuitry

To elaborate: Position circuitry adds all the signals and determines where each scintillation event occurred in the detector. It is an electronic circuit and it receives all the signals from photo multiplier tube.