Which of the following is a pattern of holes through gamma ray absorbing material, usually lead or tungsten?
A. Collimator
B. Detector crystal
C. Photo multiplier tubes
D. Position circuitry
Answer:A
Which of the following is a pattern of holes through gamma ray absorbing material, usually lead or tungsten?
A. Collimator B. Detector crystal C. Photo multiplier tubes D. Position circuitry
Explanation: Collimator is a pattern of holes through gamma ray absorbing material, usually lead or tungsten. In the conventional method, the collimator is placed over the detector crystal.