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[目的]探讨多排螺旋CT多平面重建(MPR)技术在胃癌术前T、N分期中的作用。[方法]75例患者术前采用16排螺旋CT平扫和动脉期、门静脉期两期增强扫描,对其常规5mm层厚横断面图像及薄层MPR图像中的肿瘤进行定位及T、N分期,并与病理结果对照。[结果]常规5mm层厚横断面与MPR图像对胃癌的检出率分别为93.3%和97.3%,其中MPR图像对进展期胃癌的检出率为100%。常规5mm层厚横断面与MPR图像的术前T分期总体准确率分别为55%和73%(P=0.017),两种方法的术前N分期总体准确率分别为62.7%和77.3%(P=0.037)。[结论]与常规横断面相比,采用MPR后处理技术能提高病变的检出率,有助于提高病变的T、N分期。
[Objective] To investigate the effect of multislice spiral CT multiplanar reconstruction (MPR) on preoperative T and N staging of gastric cancer. [Methods] Totally 75 patients underwent 16-slice helical CT scan and arterial phase and portal venous phase enhanced scan. The tumor location and T, N staging in conventional 5-mm-thickness cross-sectional images and thin- , And compared with the pathological results. [Results] The detection rates of conventional 5mm thickness cross section and MPR images on gastric cancer were 93.3% and 97.3%, respectively. The detection rate of MPR in advanced gastric cancer was 100%. The overall preoperative T-staging accuracy was 55% and 73%, respectively (P = 0.017). The overall preoperative accuracy of the two methods was 62.7% and 77.3% (P = 0.037). [Conclusion] Compared with the conventional cross-section, the MPR post-treatment technique can improve the detection rate of lesions and help to improve the T, N stage of the lesions.