QUANTITATIVE THREE-DIMENSIONAL DYNAMIC IMAGING OF STRUCTURE AND FUNCTION OF THE CARDIOPULMONARY AND CIRCULATORY SYSTEMS IN ALL REGIONS OF THE BODY.

This presentation describes the background for, and design of a third-generation, general purpose, all-electronic spatial scanning system, the DSR (Dynamic Spatial Reconstructor). The basic components of the system are 28 x-ray tubes arranged around a semicircle of radius 57 inches and a 12-inch wide fluorescent screen bent around an opposing 23 inch radius semicircle. Twenty-eight sets of image-intensifiers and image isocon video cameras are arranged behind and optically focused upon the fluorescent screen to produce twenty-eight video images of the 12 inch multiplied by 12 inch overlapping roentgen projection images produced on the screen. Its specified performance capabilities will provide dynamic and stop-action three-dimensional spatial reconstructions of any portion of the body based on a minimum exposure time of 0. 01-second for each 28 multiplanar 180 degree scanning set, a maximum scan repetition rate of sixty 28 multiplane scan sets per second, each scan set consisting of a maximum of 240-parallel cross sections of a minimum thickness of 0. 9 mm, and encompassing a maximum cylindrical volume about 23-cm in length and up to 38-cm in diameters. Associated with the DSR are video recording, computer, and data-analysis equipment.