RT Journal Article SR Electronic T1 Cerebral Blood Flow-to-Blood Volume Imaging by SPECT—Reply JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 1939 OP 1939 VO 27 IS 12 A1 Knapp, Wolfram H. A1 von Kummer, Rüdiger A1 Kübler, Wolfgang YR 1986 UL http://jnm.snmjournals.org/content/27/12/1939.1.abstract AB