RT Journal Article SR Electronic T1 Gating Mechanism for Motion-Free Liver and Lung Scintigraphy JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 939 OP 941 VO 13 IS 12 A1 Frank H. DeLand A1 Walter Mauderli YR 1972 UL http://jnm.snmjournals.org/content/13/12/939.abstract AB