For this assignment I created four different techniques for rendering
multimodal volumetric data sets. I also made a dummy object to increase the
perception of spatial allignmen and a rgb to h converter so it would be easier
to render the rgb data-set.

Regular rendering of the PET data-set using the Hue value as intensity.

First Hit rendering of the PET data, with a transparent rendering of the skull above
Demo of FirstHit technique

Using the first hit in the PET, then retrieving the data from the MRI

Maximum Intensity Projection of the PET data-set with the DVR of the CT, Transparency of the CT is related to the intensity of the MIP
Demo of MIP technique

Opacity peeling of the CT with First Hit rendering of the PET
Demo of Opacity peeling technique

Contour rendering of the scull with DVR of the PET data set
Demo of Contour technique