headaches, known brain tumor patient for planning surgical resection. Multiple fiducial markers were seen on scalp for the registration of surgical planning.Comparing to prior exam, the left cerebellar hemispheric lesion shows focal resection cavity with surrounding edema indicating post operative status.In addition, there is a new high signal intensity lesion (15mm x 10.5mm) on the left thalamus on T2 weighted image.The lesion does not show susceptibility artifacts on gradient echo images.The ventricles, sulci and cisterns are symmetric and unremarkable. The midline structures and cranial-cervical junction are normal. Normal flow voids are identified in the major intracranial vessels. The paranasal sinuses and mastoid air cells are clear.
1. Postoperative status of the left cerebellar hemispheric lesion.2. New T2 high signal intensity lesion on the left thalamus measuring 15mm x 10.5mm. 