RT Journal Article SR Electronic T1 Measurement of Gallbladder Ejection Fraction JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 1544 OP 1546 VO 44 IS 9 A1 Chen, Charles C. A1 Campbell, Gordon T. YR 2003 UL http://jnm.snmjournals.org/content/44/9/1544.abstract AB