Metastatic NSCLC to right frontal brain metastasis s/p frameless SRS on 3/24/16. There is a punctate focus of residual enhancement susceptibility effect at the site of the treated anterior right frontal lobe lesion without surrounding edema. There is a background of mild scattered T2 hyperintensity without enhancement in the bilateral cerebral hemisphere and pontine white matter, which may represent chronic small vessel ischemic disease. There is no evidence of new lesions. There is no evidence of intracranial hemorrhage or acute infarct. The ventricles and basal cisterns are unchanged in size and configuration. There is no midline shift or herniation. The major cerebral flow voids are intact. The skull, paranasal sinuses, and scalp soft tissues are grossly unremarkable. There is a left lens implant.
Marked interval decrease in size of the treated right frontal lobe metastasis. 