Automatic Registration of PET and CT resp. PET and MRT volume data

Motivation: There are millions of people which suffer from tumors and their harmful consequences. All the methods to face up tummors require the most accurate determination of their position and extension. Nowadays, several techniques are available for resolving how the tumors are. Three of the most important medical imaging techniques are Computed Tomography (CT), Magnetic Resonance Tomography (MRT), and Positron Emission Tomography (PET). The first two ones are anatomical modalities, that is to say, they represent the physical structures inside the body. The latter represents they way an organ is functioning. It is a functional medical modality. Task: The aim of this work is the registration of CT and PET as well as MRT and PET. The registration consists of situating the two modalities together so that the specialist can extract the advantages of visualizing them at the same time. That is why complementary modalities are selected. These registration is performed in an automatic way. It does not need the interaction of a user. It only needs the information of the voxels, so the determination of contours, segmentations, or any other preprocess step are not necessary. The implemented method is valid for datasets with different resolutions, different voxel sizes, and different orientations.