本文综述了CT、MR和超声三种方法在消化道恶性肿瘤治疗前分期及治疗后随访中各自的优缺点。在食管和结肠癌,CT和MR由于不能确定管壁肿瘤侵犯的深度,因此无法用于TNM分期,而腔内超声检查则可弥补这二者的不足。在肝癌,三种检查方法都很有用,但到底哪种最好,尚需进一步研究。 This article reviews the advantages and disadvantages of the CT, MR and ultrasound methods in the pre-treatment staging and post-treatment follow-up of patients with gastrointestinal cancer. In the esophagus and colon cancer, CT and MR can not be used for TNM staging due to the inability to determine the depth of invasion of the wall, and intraluminal ultrasound can make up for the lack of both. In liver cancer, three types of tests are useful, but which one is best is still needed for further study.