Three-dimensional tomographic imaging by semiconductor Compton camera GREI for multiple molecular simultaneous imaging

We have investigated the possibility of three-dimensional (3D) tomographic imaging by semiconductor Compton cameras that we have been developing for multiple molecular simultaneous imaging. As a significant feature of Compton cameras, multi-directional projection of the ¿-ray source distribution can be obtained even by a fixed-angle imaging with a single Compton camera unit. We have already implemented a 3D tomographic image reconstruction method applicable for both single- and multiple-unit Compton cameras, and succeeded in 3D tomographic imaging with a single Compton camera unit. In order to enlarge the field of view and to obtain more accurate images, we are constructing an array of multiple semiconductor Compton camera units.