Fig 4.

A gadolinium-enhanced T1-weighted (left) and T2-weighted (right) image from a 67-year-old man who presented with headaches and a left hemiparesis. Our results have shown that we can identify a region around a tumor with decreased anisotropy (q, shown in green) that shows the limit of the gross tumor, and a region around this with normal anisotropy but increased isotropy (p, shown in red) that can identify the infiltrating tumor margin. These zones extend beyond the abnormal areas on both enhanced T1- and T2-weighted MRI