Images of a 55-year-old male with a grade II astrocytoma.

<p>(A) ROI-drawn rCBV map overlaid on a T2-weighted image, (B) contrast-enhanced T1-weighted image, (C) histogram of nCBV and (D) cumulative nCBV histogram. The 99<sup>th</sup> percentile value of the cumulative nCBV histogram was 3.703. ROI = region of interest; rCBV = relative CBV; nCBV = normalized CBV.</p>