Digital Scintigraphy: Concepts and Designs

Fundamentals of a 1-D digital camera are reviewed in order to introduce new designs and concepts having broader applications. A digital iterative position analysis procedure accounts for coordinate response interdependencies in a 2-D camera which would otherwise result in image nonlinearities and nonuniformities. Faster position analysis is made possible by a circuit employing buffered analog pulse current integrators which are multiplexed with an analog-to-digital converter. These digital camera designs, along with a digital method of rejecting pulse pileup which is currently under development, are incorporated in the design of a fast high sensitivity stationary single crystal scintillation camera. The design employs fixed z collimation and rotatable slit ¿ collimation to collect data for single photon computerized tomography applications.