RT Journal Article SR Electronic T1 Cervical Venous Reflux in Dynamic Brain Scintigraphy JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 9 OP 12 VO 17 IS 1 A1 David B. Hayt A1 Louis A. Perez YR 1976 UL http://jnm.snmjournals.org/content/17/1/9.abstract AB