Brain transit time.
D000368:Aged; D001776:Blood Circulation Time; D001783:Blood Flow Velocity; D002533:Cerebral Angiography; D002560:Cerebrovascular Circulation; D002561:Cerebrovascular Disorders / Q000175:diagnosis*; D005260:Female; D006801:Humans; D008297:Male; D008722:Methods; D008875:Middle Aged; D011187:Posture; D011877:Radionuclide Imaging; D012588:Scintillation Counting; D014655:Vascular Resistance