Laser Spectroscopic Computed Tomography Using Coherent Detection Imaging Method for Biomedical Applications

In this paper, we reprot the feasible and realible method for the laser absorption computer-assisted tomographic imaging based on the optical heterodyne technique that has very high sensitivity and excellent directivity to distinguish one direction from another. This new method is named the Coherent Detection Imaging (CDI). We have demonstrated experimentally the fulfillment of three fundamental conditions for the establishment of laser absorption computed tomography by means of the optical heterodyne method in biological tissues exhibiting severe multiple light scattering. Thus the first successful Imaging by laser absorption computed tomography of In vivo/in vitro biological objects has been achieved utilizing our CDI method and the projection slice theorem.