不同剂量前门控心脏冠状动脉多层螺旋CT成像的比较

发布时间：2018-11-01 12:43

【摘要】：目的比较不同剂量前瞻性门控轴面扫描心脏冠状动脉多层螺旋CT成像质量及辐射剂量。方法抽取通过前瞻性门控轴面扫描拟行心脏冠状动脉成像的80例患者为研究对象,随机双盲法将其分为两组,每组40例,120k V/100m As者为低剂量组,120k V/200m As者为常规剂量组,多层螺旋CT扫描后专业人员处理图像,比较两组图像质量及有效辐射剂量等指标。结果低剂量组图像质量:优30例,良10例;常规剂量组图像质量:优31例,良9例,两组图像质量比较差异无统计学意义(P0.05);两组SNR、CNR比较差异无统计学意义(P0.05);低剂量组ED(1.71±0.18)m Sv显著低于常规剂量组的(2.86±0.44)m Sv,差异有统计学意义(P0.01)。结论低剂量前瞻性门控轴面扫描成像与常规剂量成像质量类似,但能显著减少受检者辐射剂量,值得临床推广。
[Abstract]:Objective to compare the imaging quality and radiation dose of multislice spiral CT in cardiac coronary artery with different dose prospective gated axial scan. Methods A total of 80 patients undergoing prospective gated axial scanning were randomly divided into two groups: 40 patients in each group and 120 kV / 100m As as low dose group. In 120kV / 200m As group, the images were processed by professionals after multi-slice spiral CT scanning. The image quality and effective radiation dose were compared between the two groups. Results in the low dose group, the image quality was excellent in 30 cases and good in 10 cases, while in the routine dose group, the image quality was excellent in 31 cases and good in 9 cases. There was no significant difference in image quality between the two groups (P0.05). There was no significant difference in SNR,CNR between the two groups (P0.05), and ED in the low dose group (1.71 卤0.18) m Sv) was significantly lower than that in the conventional dose group (2.86 卤0.44) m Sv,) (P0.01). Conclusion the quality of low dose prospective gated axial scanning is similar to that of conventional dose imaging, but it can significantly reduce the radiation dose of the patients, which is worthy of clinical application.
【作者单位】：湖北省荆州市第二人民医院CT室;
【分类号】：R816.2;R541.4

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