Gamma camera MTFs from edge response function measurements.

An experimental procedure using edge response functions (ERF) has been devised to rapidly provide modulation transfer function (MTF) values for gamma camera imaging. Both camera intrinsic and system MTFs are generated. This procedure uses a simple test tool to generate the ERF which is then processed by a computer program using a cubic splines differentiation technique and a discrete Fourier transform algorithm to produce the MTF values. An analytic test of the computer algorithms as well as an experimental test using collimator data from the Bureau of Radiological Health is presented to confirm the accuracy of the procedure.