食管癌放疗前CT扫描的临床价值(附165例初步分析)

The Evaluation of Computed Tomography Scan Before Radiotherapy on Esophaqus Carcinoma

目的：探讨食管癌放疗前CT扫描的临床价值。材料与方法：165例食管癌放疗前作了CT扫描，对病变长度、软组织影最大宽度进行了测量，对异常肿大的淋巴结、受侵部位逐一记录。结果：表明病灶越长、软组织影最大宽度平均值比例增大。病变＜5cm，软组织影最大宽度平均值为3．12，5～7cm为4．403．1～9cm为5．09；＞9cm为5．61。淋巴结转移占35．15％，外侵占89．7％，外侵常累及的部位气管占55．15％（91／165）、隆突下占41．12％（68／165）、主动脉弓占29．70％（49／165）降主动脉占41．18％（69／165）、奇静脉窝占15．15％（25／165）、心包占10．30％（7／165）。结论：CT扫描的临床价值在于明确病灶范围，合理设计放射野，CT图像还可直接输入“T．P．S”（TreatmentPlanningSystem）进行放射治疗计划的设计、优化。

Objective: To evaluate the CT scan before radiotherapy on esophageal carcinoma. Materials and Methods: The 165 esophaqus carcinoma patients had CT scan before radiotherapy. We measured the length of the cancer and the largest width of the mediastina. We recored the abnormal lymph nodes and the effected region. Results: The longer the cancer region is, the larger the maximum width of the mediastina is The lymphotic metastastic rate is 35. 15% (58/168), extension rate is 89. 7% (144/165). The metastatic region is usually found in trachea, azyqosvein, aortic arch, descending aorta tec. Conclusion: The esophaqus carcinoma patients should get CT scan before radiotherapy conventionaly to define the region to be irradiated. And the CT picture can be imported to 'T. P. S'directly to design and refine the radiotherapy prcgrm.