Abstract
A multidetector system for regional pulmonary function evaluations using xenon-133 is described. Sixteen NaI(Tl) detectors (eight collinear pairs) are employed and counting data is accumulated into a 1600-word magnetic core memory via a high speed, buffered, data acquisition system. The data are read out from the magnetic core memory to digital magnetic tape for processing and analysis using a laboratory computer system. A general description of the experimental techniques of radiospirometry and of the methods for data analysis is given.