MRI相控阵线圈在直肠癌术前分期中的应用价值

目的 探讨MRI相控阵线圈在直肠癌术前分期中的应用价值.方法 43例经病理证实的直肠癌患者,术前应用MRI体表相控阵线圈检查.将术前MRIT分期结果及淋巴结转移诊断与术后病理组织学对照.结果 43例直肠癌病例术前T分期诊断准确率81.4%.诊断淋巴结转移的准确率83.7%.敏感度78.9%,特异度87.5%.转移性淋巴结在T2WI上表现为混杂信号,边缘形态不规则.结论 MRI体表相控阵线圈检查对于直肠癌T分期有着较高的诊断准确率,转移性淋巴结在MRI上具有一定特异性征象,MRI相控阵线圈在直肠癌术前分期中有较高的临床价值.

Evaluation of phased-array coil in pre-operative MRI staging of rectal carcinoma

Objective To evaluate the efficacy of phased array coil in pre-operative MRI staging of rectal carcinoma. Methods Forty-three patients with rectal carcinomas underwent pre-operative MRI. The appearances on MRI were correlated with histopathological findings. Results The overall diagnostic accuracy of MRI T staging was 81.4%. The diagnostic accuracy, sensitivity and specificity of metastatic lymph nodes were 83.7 %, 78.9% and 87.5 %, respectively. The metastatic lymph nodes showed mixed signal intensity and irregular borders. Condusion MRI using phased array coil for staging of rectal cancer has high diagnostic accuracy. The appearance of metastatic lymph nodes on T2WI is characteristic and contributes to the diagnosis of nodal involvement in rectal cancer.