能谱CT的SSA技术在前瞻性心电门控冠状动脉成像中的应用

发布时间：2018-07-23 14:18

【摘要】：目的探讨能谱CT snapshot assist(SSA)技术在前瞻性心电门控冠状动脉成像中降低患者辐射剂量中的应用价值。方法收集行前瞻性心电门控冠状动脉成像的患者59例,分为SSA组及常规组,SSA组采用SSA技术扫描。比较SSA组与常规组图像质量和剂量长度乘积(DLP)、有效辐射剂量(ED)的差异。结果 2组图像质量评分差异无统计学意义(χ~2=2.362,P=0.307),2组冠状动脉CTA左主干起始处的主动脉根部平均CT值差异无统计学意义(Z=-0.061,P=0.951);噪声、CNR、SNR差异均有统计学意义(P均0.05)。SSA组DLP为(135.44±37.41)mGy·cm,ED为(1.89±0.52)mSv,常规组DLP为(275.57±36.59)mGy·cm,ED为(3.85±0.51)mSv,2组差异均有统计学意义(t=14.504,P均0.001),SSA组较常规组有效辐射剂量降低约50.85%。结论能谱CT的SSA技术在前瞻性心电门控扫描冠状动脉成像中可以降低患者的有效辐射剂量,具有较高的临床应用价值。
[Abstract]:Objective to evaluate the value of energy dispersive CT snapshot assist (SSA) (EDS) in reducing radiation dose in prospective ECG gated coronary angiography (ECG). Methods 59 patients undergoing prospective ECG gated coronary angiography were divided into two groups: SSA group and routine group. To compare the difference of image quality and dose length product of (DLP), effective radiation dose (ED) between SSA group and routine group. Results there was no significant difference in image quality score between the two groups (蠂 ~ (2 / 2) 2.362P ~ (0.307). There was no significant difference in the mean CT value of aortic root at the beginning of left main coronary artery CTA in the two groups (Z ~ (-0.061) P ~ (0.951), and there was significant difference in DLP between the two groups (P < 0. 05). The DLP of SSA group was (135.44 卤37. 41) mGy 路cm ~ (-1) Ed. The effective radiation dose of SSA group was (275.57 卤36.59) mGy / cm ~ (-1) Ed was (3.85 卤0.51) mSvD and (1.89 卤0.52) mSv, respectively. The effective radiation dose of SSA group was decreased by 50.85 than that of the conventional group (t _ (14.504) P ~ (0.001). Conclusion the SSA technique of energy dispersive CT can reduce the effective radiation dose in prospective ECG gated coronary angiography and has high clinical application value.
【作者单位】：山西省心血管病医院CT室;
【分类号】：R541.4;R816.2

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