title: Comparison of accuracy between initial and delayed  99m Tc-pertechnetate brain scans.
mesh_terms: D001165:Arteriovenous Malformations / Q000175:diagnosis; D001254:Astrocytoma / Q000175:diagnosis; D001921:Brain / Q000000981:diagnostic imaging; D001932:Brain Neoplasms / Q000175:diagnosis*; D002561:Cerebrovascular Disorders / Q000175:diagnosis; D003388:Cranial Fossa, Posterior / Q000000981:diagnostic imaging; D005909:Glioblastoma / Q000175:diagnosis; D006801:Humans; D008579:Meningioma / Q000175:diagnosis; D009362:Neoplasm Metastasis; D011859:Radiography; D011877:Radionuclide Imaging; D013667:Technetium; D013997:Time Factors
chemical_list: D013667:Technetium