Left hemifacial spasm preoperative planning. A vascular structure appears to slighty indent the left cranial nerve 7 and 8 complex, although the images are not optimized for detailed delineation of these structures. There is no evidence of intracranial mass. The brain parenchyma and pituitary gland appear unremarkable. There is no abnormal intracranial enhancement. 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. There are scalp fiducial markers.
Preoperative planning MRI for microvascular decompression.