de Lange E E, Fechner R E, Edge S B, Spaulding C A
Department of Radiology, University of Virginia Health Sciences Center, Charlottesville 22908.
Radiology. 1990 Sep;176(3):623-8. doi: 10.1148/radiology.176.3.2389016.
Twenty-nine patients with rectal carcinoma were examined with magnetic resonance (MR) imaging at 1.0 T. In most patients a Helmholtz coil was used and a bowel distention obtained with a barium enema balloon tip. The MR findings were graded according to the modified Astler-Coller staging classification and correlated with the surgical or histopathologic results. Correct diagnosis was made in nine of the 12 patients with stage A and B1 tumors. Overestimation occurred in the other three patients, who had previously undergone radiation therapy or surgery. Local stage was correctly assessed in 11 patients with stage B2 carcinoma and in six patients with stage B3 tumors. Enlarged lymph nodes were detected in four of seven patients with nodes containing carcinoma. In two other patients with enlarged nodes, no carcinoma was identified at histologic examination. MR imaging may enable correct staging of local extent of rectal carcinoma, particularly in patients who have not previously undergone radiation therapy or surgery. However, evaluation of lymph nodes is less accurate.
对29例直肠癌患者进行了1.0T磁共振（MR）成像检查。大多数患者使用了亥姆霍兹线圈，并通过钡剂灌肠球囊尖端实现肠管扩张。MR表现根据改良的阿斯特勒-科勒分期分类进行分级，并与手术或组织病理学结果相关。12例A期和B1期肿瘤患者中有9例诊断正确。另外3例患者诊断高估，这3例患者之前接受过放疗或手术。11例B2期癌患者和6例B3期肿瘤患者的局部分期评估正确。7例有癌转移淋巴结的患者中有4例检测到肿大淋巴结。另外2例淋巴结肿大患者在组织学检查中未发现癌。MR成像可能有助于正确分期直肠癌的局部范围，特别是对于那些之前未接受过放疗或手术的患者。然而，对淋巴结的评估准确性较低。
