Figure 4.

Diagram showing the simple process used for image fusion. (1) The overlay image (PET image) is selected and (2) a color scale is applied. (3) The image fusion is initiated by drag-and-drop of the PET window title bar over the CT window resulting in (4) a fused image set obtained by color blending of the two original sets. The image fusion is instantaneous and the user can continue to navigate through the whole set of fused images and apply any of the processing tools such as intensity and contrast adjustment, slice thickness adjustment, MIP and MPR.