報告兩例搭99m標定紅血球之胃腸道出血閃爍攝影時之延遲膽囊顯像。這些病患均有腎衰竭、洗腎，及經多次輸血。延遲膽囊顯像機轉可能是錯99m與血色素結合，由膽汁排出。當判讀搭99m標定紅血球之胃腸道出血閃爍攝影在這類病人時，需考慮到此種膽囊延遲顯像的可能性，不一定是膽囊出血。

Two cases of delayed gallbladder visualization d前詛g Tc-99m RBC scintigraphy for gastrointes血al bleeding were r，叩orted. Thesepatients had renal failure， hemodialysis， anemia" and multiple blood transfusions. The mechanism for delayed gallbladder visualization probably related to Tc-99m labeling of heme thus the radioactivity can be excreted in bile. Wheninterp自由19 Tc-99m RBC scintigraphy in such patients， we should aware the possibility of delayed gallbladder visualization. And也ismaynotr，叩resent hematobilia.