Clinical question: History of brain metastases status post radiation without confirmation of diagnosis; Stealth sequence - 1 mm cuts no fiducial. Signs and symptoms: Preop planning. Pre-and post-enhanced Stealth brain MRI:The examination is severely limited secondary to fairly extensive streak artifacts from patient's halo. Previously known tumor in the right thalamus and right cerebral peduncle is only partially visualized and appears as a ring enhancing mass. It measures approximately 18 X 15 -mm in size and is only partially visualized. No convincing evidence of any additional abnormal enhancing lesions.No acute new finding since prior study.
Pre-and post-enhanced surgical planning stealth head CT partially re-demonstrates a necrotic rim enhancing mass in the right thalamus/right cerebral peduncle measuring 18 x15-mm in size.