Cerebrovascular permeability studies in cerebral neolasms and vascular lesions: optimal dose-to-scan interval for pertechnetate brain scanning.

Selection of subjects. Patients with brain tumors and one with an arteriorvenous anomaly (hereafter included in the tumor classification) who were re ferred for brain scanning were chosen for this study. At subsequent operations all the patients were found to have one of a variety of pathologic processes. There were six males and five females with ages rang ing from 8 to 66 years. Scanning dose. All patients were injected with 5-6 mCi of 99mTc-pertechnetate (T1/2, 6-hr; gamma