Triple-head coincidence imaging

Coincidence imaging with a triple-head gamma-camera offers the possibility of greater sensitivity than dual-head coincidence gamma-camera systems. Using data collected from computer simulations, this paper compares both systems and reports on the sensitivity improvements that can be expected using a triple-head system. It is found that the sensitivity profiles for triple-head systems remain uniform across the field-of-view, unlike the profiles for a dual-head system which decrease as one moves away from the center of the field-of-view. The actual increase in sensitivity depends upon the configuration of the heads and the size and location of the object. Increases of 80% for a small organ orbit or 65% for a large organ orbit are achievable