Image Intensity Settings for Dual Tomographic Scanner

The Siemens Gammasonics Pho/Con dual tomographic scanner is well established for multiplane imaging in several routine nuclear medicine procedures. The system is designed to produce tomographic images directly on film, without data storage for replay or image processing. Difficulty can arise when selecting the best film-exposure intensity settings because of count rate variations among patients. A method to translate the tomographic scanner's count density meter readings into optimal film exposure intensity settings is described. This technique is easily adapted to individual choices of film, film processing, and image density. It can be used for the entire sequence of scanner operating parameters.