The gamma camera system consists of a collimator, a sodium iodide crystal, photomultiplier tubes, and a computer. What is the function of each of these components in the system?

The collimator filters a stream of rays so that only those traveling parallel to a specified direction are allowed to pass through and reach the detector for imaging. Special collimators can magnify or minimize images. The sodium iodide crystal produces bursts of light when struck by gamma radiation. The photomultiplier tubes transform the light into electric pulses, which are turned into images by the computer.