The design of noninvasive methods for clinical diagnosis of cancer in soft tissues requires the development of experimental procedures and theoretical methods which allow the reconstruction of the optical properties of the tissue. These procedures represent basic elements in developing the diagnosis method. In this work, the recent results obtained at our laboratory about these problems are presented. A physical soft tissue model, with opaque inclusions, was constructed, and was irradiated with laser light of HeNe (632 nm, 25 mW) and Nd:YAG (532, 30 mW), the light scattered by the model was captured by a digital camera and the images were digitally processed. In addition, a calculation algorithm, that allows calculating the light intensity as the beam propagates in the model medium, has been designed. The results of the experimental studies are presented and compared with the theoretical results.