Fig. 2

Concept of subtraction of perfusion images in a healthy voluneer. (a) represents the data set with the maximum contrast enhancement. (b) is an early data set without contrast media. Subtraction of both data sets (c) results in an image with suppressed background and therefore enhanced perfusion. The 3D nature of the data sets allow for reformation in any plane, like axial (d) or sagittal (e)