ABSTRACT
Q. 1. a. 99mTc-HMPAO crosses the blood-brain barrier. b. Regional uptake of HMPAO is proportional to regional cerebral blood flow to the same area. c. Distribution of HMPAO in the brain is independent of brain maturation. d. Diffuse lung uptake of HMPAO is seen only in people with a history of smoking. e. Focal cerebral uptake is seen in herpes simples encephalitis.
