不同管电压和对比剂剂量条件下冠状动脉CT血管成像质量研究

发布时间：2018-07-06 08:20

本文选题：冠状动脉CT血管成像 + 管电压　；参考：《重庆医学》2015年21期

【摘要】：目的探讨不同管电压和对比剂剂量条件下冠状动脉CT血管成像(CCTA)质量,选择最佳的冠状动脉成像扫描方案。方法选择南阳市中心医院2012年10月至2013年10月临床怀疑和诊断冠心病并在1周内行CCTA检查的患者98例,按随机数字表法及患者意愿分为3组(A、B、C组),分别比较三支主冠状动脉的CT值,3组的信噪比(SNR)、对比(CNR)噪声比及图像质量。结果三支主冠状动脉的CT值比较,A组与B组比较,差异无统计学意义(P0.05),C组的CT值均高于A、B两组的CT值,差异均有统计学意义(P0.05);三支主冠状动脉的标准差(SD)值比较,A组与B组比较差异无统计学意义(P0.05),C组的SD值均高于A、B两组的SD值(P0.05)。3组间的SNR值、CNR值及图像质量差异均无统计学意义(均P0.05)。3组的有效辐射剂量分别为(7.5±0.4)mSv、(6.2±0.3)mSv和(4.1±0.2)mSv,差异有统计学意义(P0.05)。结论C组的扫描方案在降低了辐射剂量的同时也减少了对比剂剂量的使用。
[Abstract]:Objective to study the quality of coronary artery CT angiography (CCTA) under different tube voltage and contrast dose, and to select the best coronary artery imaging scheme. Methods from October 2012 to October 2013, 98 patients with suspected coronary heart disease (CHD) were examined by CCTA in Nanyang Central Hospital. According to the random digital table method and the patients' wishes, the patients were divided into three groups (group A, B, C). The signal-to-noise ratio (SNR), noise ratio (CNR) and image quality of the three main coronary arteries were compared. Results there was no significant difference in CT value between group A and group B (P0.05). The CT value of group C was higher than that of group A (P 0.05). There was no significant difference in standard deviation (SD) between group A and group B (P0.05) the SD value of group C was higher than that of group A (P0.05) and the difference of image quality between group A (P0.05) and group A (P0.05) was higher than that of group A (P0.05). The effective radiation dose in the group without statistical significance (P0.05) was (7.5 卤0.4) mSv, (6.2 卤0.3) mSv and (4.1 卤0.2) mSv, respectively. The difference was statistically significant (P0.05). Conclusion the scan scheme of group C not only reduces the dose of radiation, but also reduces the dosage of contrast agent.
【作者单位】：南阳市中心医院CT影像科;郑州大学第一附属医院放射科;
【基金】：国家自然科学基金资助项目(81301220)
【分类号】：R816.2

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