A simple and inexpensive method for the recording of scintillation camera data at low and moderate count rates

The results of an analogue method for recording scintillation camera data using two modern instrumentation recorders is described. Images within about 15000 CPS can be recorded without loss of uniformity or resolution. The equipment needed is two channels per isotope of an instrumentation recorder, and simple additional pulse shaping circuitry. Comparators and a pen recorder can be used for information about an area of interest. The major cost is the instrumentation recorder (about Pound3000). The system cannot be used for studies above about 20,000 CPS, and is only suitable for slow dynamic studies such as renograms. Simplicity, low cost, immediate replay one site and almost instant quantitative data after a patient study without programming make this method attractive for a small routine nuclear medicine department without access to a digital computer. (author)