RT Journal Article SR Electronic T1 Unidirectional versus Bidirectional Scanning—The Authors’ Reply JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 769 OP 769 VO 12 IS 11 A1 Simmons, G. H. A1 Kereiakes, J. G. YR 1971 UL http://jnm.snmjournals.org/content/12/11/769.abstract AB