Bilinear interpolation from polar to rectangular point raster for inverse problem solving

The goal of tomographic imaging systems is to provide a visual information from the inside of examined objects. In the main application area of these systems-the medical diagnosis-the examined object is the human body. It is very special object because of its nature. That is why it is very important to get source data for a least time. Another motivation of using the efficient algorithm for the image reconstruction methods in thermographic systems is the fact that the required information is accessible to the system in some indirect form only. The task of tomographic reconstruction is to find out from the measured indirect data the unknown function f(x,y).