RT Journal Article SR Electronic T1 Assessment of Pediatrie Hydronephrosis Using Output Efficiency JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 1487 OP 1489 VO 38 IS 9 A1 Gordon, Isky YR 1997 UL http://jnm.snmjournals.org/content/38/9/1487.abstract AB