Compton tomographic imaging: Design aspects and performance

As an introduction to tomographic imaging, the author describes three imaging methodologies following the design principle and the scanning mode: point-by-point imaging; line-by-line imaging; and plane-by-plane imaging. The new 900 Compton Scattering Tomography of Okuyama is described with respect to basic principles, design aspects, and applicative possibilities especially for the lungs. Performance testing results of 900 CST of the lung are presented: energy resolution, spatial resolution. It is concluded that the technique of 900 Compton Scattering Tomography for lung studies represents a simple and inexpensive tool for the morphological and functional investigation of the lung state and particularly, of its density. (G.J.P.)