New scan may spare brain cancer patients unnecessary surgery

This study tests a new type of PET/MRI scan to tell the difference between a brain tumor growing back and a side effect of radiation called radionecrosis. Both conditions look very similar on regular scans and cause similar symptoms, so doctors often need surgery to find out which it is. The goal is to see if this special scan can give a clear answer without needing an operation. The study involves 30 adults who have had radiation for brain metastases and now have a new brain lesion that might be either tumor growth or radiation damage.