In this Paper, I propose the feasibility of coherent imaging using lasers. This paper reviews several methods for realizing image formation through a highly scattering medium using coherent technique such as Coherent Detection Imaging (CDI), Optical Coherent Tomography (OCT) and Chrono-Coherent Imaging (CCI).For the establishment of laser absorption computer-assisted tomography for biomedical applications on the basis of not only the projection slice theorem but also of image reconstruction by the optical diffusion tomography, the following four properties for optical detection should be satisfied basically; 1) Directionality, 2) Excellent sensitivity, 3) Wavelength selectivity and 4) Detectability of optical path distribution.