介绍一种选择性降低本底放射性的新方法:利用体外免疫吸附法清除血浆中未结合的放射性标记抗体,其优点在于能控制循环血液中未结合抗体消除的时间,并避免再次注射可能引起免疫反应的化合物.6例非小细胞肺癌和1例乳腺癌病人,其原发灶和转移灶均经支气管镜、内窥镜、X线平片、CT确诊,所有病人均接受静脉输注148MBq(4mCi)的 A new method of selective reduction of background radioactivity is introduced: the use of in vitro immunoadsorption to remove unbound radiolabeled antibody in plasma has the advantage of controlling the elimination of unconjugated antibodies in circulating blood and avoiding re-injections that may cause immunity 6 cases of non-small cell lung cancer and 1 case of breast cancer patients, the primary tumor and metastasis were confirmed by bronchoscopy, endoscopy, X-ray, CT, all patients received intravenous infusion of 148MBq ( 4mCi)