EXPERIMENTALLY DETERMINING A PARAMETRIC MODEL FOR THE POINT-SOURCE RESPONSE OF A GAMMA-CAMERA

In this paper, we experimentally investigate the response of a gamma camera as a function of two parameters: depth of the source in water and remaining distance in air from the gamma camera. We demonstrate the linearity of the FWHM resolution measure versus these two parameters. We present a method for experimentally estimating the parameters of any camera response model from the experimental data. We use this approach to estimate the parameters of a 2-D Gaussian model for the camera point source response in a true 3-D formulation.