A gamma camera is a vital imaging device used in nuclear medicine.
Explain why the lead collimator in a gamma camera must consist of long, narrow channels.
State the function of the scintillator crystal.
In one of the photomultiplier tubes, a short pulse of current of magnitude 0.24 μA0.24\text{ }\mu\text{A}0.24 μA is produced with a duration of 2.0 ns2.0\text{ ns}2.0 ns. Calculate the number of electrons that constitute this electrical pulse.
State one medical diagnostic application of a gamma camera.
