This book describes the methods for measuring cerebral blood flow (CBF) using radioactive tracers, positron emission tomography (PET) and single photon emission computed tomography (SPECT). Divided into nine chapters, the book covers the attributes, history, theory, and measurement methodology for CBF. It also explains the pathophysiology of brain vascular problems. The temporal and spatial fluctuations of CBF in correspondence with neuronal activity provide us with a new window onto how the brain works. The book details the theories and methodologies for measuring CBF and reviews advances...