目的 探讨螺旋CT多期扫描技术 在直肠癌早期诊断中的临床应用价值。 方法 选取我院2015年6月-2016年6月我 院经临床确诊的直肠癌患者120例，患者 均行螺旋CT多期扫描，收集患者影像学 资料及临床资料，明确患者T、N、M三 期结果并与术后病理结果进行对照。结 果 120例患者以病理结果为基准，螺旋 CT多期扫描结果显示：T分期诊断符合 率为92.11%(35/38)，N分期诊断符合率 为69.05%(29/42)，M分期诊断符合率为 97.50%(39/40)。CT平扫图像中主要表现 为局限性软组织密度肿块，横断面可见直 肠壁增厚明显(呈环形或半环形)，官腔变 窄，密度均匀；CT增强扫描图像中，动脉 期显示横断面增厚，直肠壁明显强化，静 脉期显示直肠管壁增厚且持续强化，延迟 期显示增厚管壁呈持续强化并管壁水肿 较为明显，肿块CT值注射造影剂后明显 升高。结论 螺旋CT多期扫描技术在直肠 癌早期诊断中应用具有较高的诊断符合 率，能良好显示肝脏血管瘤的典型影像特 征，能为临床手术和治疗方案的制定起到 很好的指导作用。

Objective To investigate the clinical value of spiral CT multi-phase scanning technique in the early diagnosis of rectal cancer. Methods Select 120 cases of rectal cancer diagnosed by our hospital from June 2015 to June 2016, the patients underwent spiral CT multi-phase scan, and collect the imaging data and clinical data,the results of T, N and M in three patients were determined and compared with the pathological results after operation. Results 120 patients were based on pathological findings, and the results of multi-phase helical CT scan showed: The diagnostic coincidence rate of T staging was 90.83% (109/120). The diagnostic coincidence rate of N staging was 67.70% (81/120), and the diagnostic accuracy rate of M staging was 96.67% (116/120). CT scan image is mainly localized soft tissue mass, rectal wall thickening (visible cross-section is circular or semi-circular), lumen narrowing, uniform density. In the enhanced CT scan, the arterial phase showed a thickening of the transverse section and a marked enhancement of the rectal wall, the venous phase showed thickening and persistent enhancement of the rectal tube wall, the delayed period showed that the wall of thickened tube showed persistent enhancement and the wall edema was more obvious. The CT value of the tumor increased obviously after injection of contrast medium. Conclusion Spiral CT multi-phase scanning technique is of high diagnostic accuracy in the early diagnosis of rectal cancer, it can well display the typical imaging features of hepatic hemangioma, and can play a very good guiding role in the development of clinical operation and treatment plan.