食管癌CT模拟定位  

CT simulation in radiotherapy for esophageal carcinoma

作　　者：陈彬璞[1] 陈亚林[1] 祝晓莲[1] 伍少鹏[1] 

机构地区：[1]北京大学人民医院放疗科,北京100044

出　　处：《中国介入影像与治疗学》2005年第1期45-47,共3页Chinese Journal of Interventional Imaging and Therapy

摘　　要：目的　探讨食管癌CT模拟定位的临床价值。方法　对 48例行单纯放疗的食管癌患者 ,比较CT模拟定位和常规模拟定位的等中心位置、射野大小及剂量分布情况。结果　CT模拟定位和常规模拟定位的等中心点位置不相同 ;射野均大于常规模拟定位 (P <0 .0 1) ,90 %等剂量线更能够适形 ,包括靶区。结论　CT模拟定位可以准确提供食管癌病变情况 。Objective To discuss the clinical value of CT simulation for esophageal carcinoma. Methods Forty-eight patients with esophageal cancinoma were underwent both CT simulation (CT-sim) and conventional simulation (Con-sim), compared the position of isocenter, field size and dose distribution in the treatment planning setup. Results The differences in isocenter position were observed obviously, the size of target volume in CT-sim were larger than that in Con-sim (P<0.01), the shape of 90% isodose curve covered the target volume in CT-sim was more conformal. Conclusion CT simulation could correctly display information of esophageal carcinoma, and improve the reasonablity for radiotherapy.

关 键 词：食管肿瘤 CT模拟定位 常规模拟定位 放射疗法 肿瘤部位 

分 类 号：R735.1[医药卫生—肿瘤]