摘要
目的比较CT和MRI在直肠癌诊断及术前分期中的价值。方法选择27例经外科手术和病理证实的直肠癌病例,所有病人均于术前进行MRI和CT检查,MRI序列包括常规T1WI、T2WI及快速梯度回波脂肪抑制（FSPGR）,CT采用平扫及动态增强扫描。观察肿瘤大小和信号,周围浸润及淋巴结增大情况,将影像观察结果与外科手术和病理诊断结果进行比较。结果T分期对于CT术前分期的准确度为88.9%、MRI为96.2%。CT诊断淋巴结转移的敏感度为24%,特异度为97.6%;MRI诊断淋巴结转移的敏感度为36%,特异度为97.6%。结论在直肠癌术前诊断及分期方面,MRI的作用优于CT。
Objective The purpose of this study was to compare the accuracy of MRI and CT in the diagnosis and preoperative staging of rectal cancer. Methods 27 patients with rectal cancer proved surgically and histologically between January to December of 2007 were studied. Each＇of patients underwent MRI and CT examinations before surgical operation. MRI study included T1WI, T2WI and FSPGR pulse sequences. CT study included plain and contrast enhanced scanning. The size and signal intensity of tumor, surrounding infiltration, and lymph nodes around the rectum were observed. The imaging findings were compared with those from surgery and pathology. Results In the preoperative T staging, the accuracy of CT and MRI were 88.9% and 96.2%, respectively. The specificity of regional lymph node invasion with CT and MRI both were 97.6%; the sensitivity of regional lymph node invasion with CT and MRI were 24% and 36%, respectively. Conclusion MRI was superior to CT in the diagnosis and preoperative staging of rectal cancer.
出处
《国际医学放射学杂志》
2008年第5期326-328,427,共4页
International Journal of Medical Radiology
