Non invasive abnormality detection in tissue optical phantoms using transillumination technique

The proposed system uses the principle of illuminating a sample with a laser beam and collecting the emitted photons through the sample using an array of photo detectors placed in fan beam geometry. Tissue model phantoms with different optical properties are used here for checking the effectiveness of the system. On the diffusely transmitted photons coming out of the sample, tomographic principles are applied to obtain the cross sectional details or tomogram of the tissue models and thereby checking for any abnormalities. The reconstruction of the tomogram was achieved by using convolution back projection algorithm and the whole system works on the basis of transillumination principle.