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目的 比较研究多平面重建 (MPR)、CT仿真结肠镜检查 (CTVC)、表面遮盖显示 (SSD)和透明显示 (Raysum)检查结直肠息肉的临床价值。材料与方法 用螺旋CT机对 2 3例结直肠息肉病例进行容积扫描 ,在工作站应用 4种后处理方法获取MPR、CTVC、SSD和Raysum图像。按息肉大小分 3组及总结果进行统计分析。病变均经常规结肠镜检查 (CC)活检和 /或手术病理证实。结果2 3例共 5 6枚息肉。MPR、CTVC、SSD和Raysum分别检出 12枚≤ 5mm息肉中的 4、6、5和 4枚 ,检出率分别为 33 .3 %、5 0 .0 %、41.7%和 33 .3 % ;检出 2 3枚 6～ 9mm息肉中的 19、2 0、16和 13枚 ,检出率分别为 82 .6 %、86 .9%、6 9.7%和 5 6 .5 % ;2 1枚≥ 10mm息肉均全部检出 ,检出率均为 10 0 %。 4种方法分别检出 5 6枚息肉中的 44、47、42和 38枚 ,总检出率分别为 78.6 %、83 .9%、75 .0 %和 6 7.9%。结论 MPR、CTVC、SSD和Raysum对于≤ 5mm、6～ 9mm息肉和总检出率上有较大差异 ,以CTVC最高。
Objective To compare the clinical value of multiplanar reconstruction (MPR), CT virtual colonoscopy (CTVC), surface occlusion display (SSD) and Raysum examination of colorectal polyps. Materials and Methods Volumetric scanning of 23 cases of colorectal polyps was performed with a spiral CT scanner. Four kinds of post-processing methods were used to obtain MPR, CTVC, SSD and Raysum images at workstation. According to the size of the polyp group 3 and the total results of statistical analysis. Lesions were routine colonoscopy (CC) biopsy and / or pathology confirmed. Results Twenty-three patients had a total of 56 polyps. MPR, CTVC, SSD and Raysum respectively detected 4 pieces, 6 pieces, 5 pieces and 4 pieces of ≤5 mm polyp, the detection rates were 33.3%, 50.0%, 41.7% and 33.3% respectively; A total of 19, 20, 16 and 13 of 6 6 ~ 9mm polyps were detected, the detection rates were 82.6%, 86.9%, 67.7% and 56.5%, respectively. 10mm polyps were all detected, the detection rate was 100%. Four methods detected 44, 47, 42 and 38 of 56 polyps respectively, with the total detection rates of 78.6%, 83.9%, 75.0% and 6.97%, respectively. Conclusions MPR, CTVC, SSD and Raysum have significant differences in the detection rate of polyps between ≤ 5mm and 6 ~ 9mm, and the highest CTVC.