The revised and updated Third Edition of this popular text/atlas details the expanding diagnostic capabilities of two of the most rapidly growing brain imaging modalities: single-photon emission computed tomography (SPECT) and positron emission tomography (PET). This edition describes the latest instrumentation and techniques and examines the clinical utility of both modalities in the evaluation of cerebrovascular disease, brain tumors, dementia, seizure disorders, trauma, and psychiatric disorders. The authors compare PET versus SPECT and introduce receptor imaging findings where applicable. More than 400 illustrations complement the text.