不同剂量64排CT增强扫描结合三维重建在胃癌应用中的图像质量研究

目的:研究不同剂量64排CT增强扫描结合三维重建在胃癌应用中的图像质量。方法:90例胃癌行胃部64层螺旋CT三期增强扫描患者后根据管电压设置分成A、B、C三组:A组120KV、B组100KV、C组80KV。通过轴位图像结合三维重建(VR、MPR和MIP等)分析不同剂量下螺旋CT扫描结合三维重建图像诊断质量。结果:A、B两组的图像清晰度的差异无统计学意义(P0.05),A、B组剂量加权指数降低率的差异具有统计学意义,A、C两组间图像清晰度及剂量加权指数降低率的差异具有统计学意义(P0.05),B、C组两项差异具有统计学意义。结论:适当调整MSCT的剂量,可以获得与常规MSCT剂量完全相同的图像而且可以降低辐射。

Different Doses of 64 Row CT Enhanced Scan Combined with Image Quality of the Application of 3 D Reconstruction in Gastric Carcinoma

ABSTRACT Objective: To study different doses of 64 row CT enhanced scan combined with image quality of 3 d reconstruction in gastric cancer. Methods: 90 cases of gastric cancer line 64 layer three periods of spiral CT enhanced scan in patients with stomach after according to the tube voltage setting is divided into three groups: A, B, C group A 120 kv, 100 kv group B, group C 80 kv. Through the shaft combined with 3 d reconstruction image (VR, MIP and MPR) analysis under the different dose spiral CT scan in combination with 3 d reconstruction image diagnosis quality. Results: Image resolution difference of A and B two groups has no statistical significance (P>0.05), A, B group of weighted index lower dose rate differences statistically significant, A, C image resolution between the two groups and dose weighted index decrease rate differences statistically significant (P<0.05), group B and C two difference is statistically significant. Conclusion: Adjust the dose of MSCT, can be obtained with conventional MSCT but also can reduce the radiation dose of the same images.