title: No radioactivity in dye.
abstract: I enjoyed Patricia Johnson's article on laporoscopic cholecystectomy (Clinical, February 17), but I feel I must make clear chat the 'radioactive opaque dye' used to demonstrate the biliary tree on X-ray is not in fact radioactive.
authors.affiliation: Ipswich.
authors.forename: Constance
authors.initials: C
authors.lastname: Fynn