Performance characteristics of a gamma camera over a wide range of energies.

The problem of choosing which collimator to use for imaging a new isotope has been approached by collecting resolution and sensitivity data for a selected group of isotopes. These have been chosen to be readily available and to have generally a single gamma-ray only. Resolution and sensitivity plots for a low energy collimator and a high energy collimator are presented and their use with several isotopes of interest is discussed. The interpretation of recommedations in the literature on the choice of collimators for newly introduced isotopes would be considerably simpler if data in this format were commonly available.