Figure 2From: Prognostic factors for survival and radiation necrosis after stereotactic radiosurgery alone or in combination with whole brain radiation therapy for 1–3 cerebral metastasesExample of recurrent brain metastasis: the study shows pathologic contrast enhancement on T1-weighted MRI and corresponding increased [18 F]-FET uptake. While radiation necrosis was suspected in MRI, PET showed a pathologic FET uptake as seen in recurrent metastasis.Back to article page