Fig 2. Example of brain metastasis treated with a second of radiosurgery (SRS2).
Both metastasis showed an increase > 20% in the longest diameter at 9 months, one with a high cerebral blood volume ratio (rCBV = 5.2) in favor of local progression (A) and the other with low rCBV (= 0.7) in favor of radionecrosis (B).