RT Journal Article SR Electronic T1 The Physical Aspects of Radioisotopic Organ Imaging JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 1049 OP 1049 VO 18 IS 10 A1 Guy Simmons YR 1977 UL http://jnm.snmjournals.org/content/18/10/1049.1.abstract AB