螺旋CT和磁共振成像检查进行直肠癌术前肿瘤原发灶浸润深度和淋巴结转移准确性研究

目的利用螺旋CT(S piral computed tomography,SCT)和磁共振成像检查(Magnetic resonance imaging,MRI)进行直肠癌术前肿瘤原发灶浸润深度(T)和淋巴结(N)分期,分析SCT和MRI在直肠癌术前分期诊断中准确性。方法本文对86名经病理证实直肠癌患者进行研究,其中46例术前行SCT检查,40例术前行MRI检查。检查结果与术后病理对照分析,比较两种方法对于直肠癌术前分期准确性。结果 SCT对T分期总准确度为:73.9%,术前SCT对T分期与病理学对T分期一致性中等;对N分期总准确度为:62.5%,灵敏度:87.5%,特异度:68.2%,术前SCT对N分期与病理学对N分期一致性中等。MRI对T分期总准确度为:75.0%,术前MRI对T分期与病理学对T分期一致性较好;对N分期总准确度为:62.5%,灵敏度:85.7%,特异度:61.5%,术前MRI对N分期与病理学对N分期一致性中等。结论 MRI对直肠癌术前T分期诊断效能高于SCT;MRI及SCT对直肠癌术前N分期准确度均不理想。

Study on the Accuracy of Spiral CT and Magnetic Resonance Imaging for Preoperative Primary Tumor Invasion Depth and Lymph Node Points

Objective To analyze the staging accuracy of spiral computed tomography (SCT) and magnetic resonance imaging (MRI) in preoperative tumor (T) and lymph node (N) staging of rectal cancer in comparison with postoperative pathological staging. Methods Eighty-six patients with histologically proven rectal carcinoma. 46 of the 86 patients were staged preoperatively using SCT, and the other 40 patients using MRI. According to the compared results, we discussed and evaluated the accuracy of SCT and MRI for preoperative staging in rectal cancer.Results The overall accuracy of SCT for T staging was 73.9%. By statistical analysis we found that the correlation was middling between preoperative SCT and pathologic T staging. We determined the values for accuracy of SCT in N staging was 62.5%, for sensitivity 87.5%, and for specificity 68.2%. By statistical analysis we found that the correlation was middling between preoperative SCT and pathologic N staging. The overall accuracy of MRI for T staging was 75.0%. By statistical analysis we found that the correlation was good between preoperative MRI and pathologic T staging. The values for accuracy of MRI in N staging was 62.5%, for sensitivity 85.7%, and for specificity 61.5%. And by statistical analysis we found that the correlation was middling between preoperative MRI and pathologic N staging.Conclusion Both preoperative SCT and MRI scans could provide good predicts compared to subsequent pathologic T staging. Furthermore, the accuracy of MRI ismuch better than that of the SCT. Both preoperative SCT and MRI scans provided poor predictive data.