title: Deadtime correcton in high count rate quantitative dynamic studies with computer-assisted Anger-cameras.
abstract: The use of tracers with high radioactivity in rapid dynamic quantitative studies (such as radioisotope angiocardiography), performed by the Anger-camera and data-processor, makes it possible to obtain a high counting ratemfor correct interpretation of the results of the analysis of activity/time curves in regions of interest, the authors determined, under different working conditions, the deadtimes of two Anger-cameras (Pho-gamma HP and Radicamera II), both connected to a data-processing system (Med-II). The problems inherent in this determination are analyzed and discussed. A computer program for curve correction was written and some examples of applications of it are presented, including an experiment to test the accuracy of the correction.
mesh_terms: D000790:Angiocardiography / Q000379:methods*; D002302:Cardiac Output; D003201:Computers; D006331:Heart Diseases / Q000175:diagnosis; D006801:Humans; D011868:Radioisotopes; D012588:Scintillation Counting
chemical_list: D011868:Radioisotopes