| 陈青峰,赵伟,李大庆,杨秋雨.低管电压、低剂量碘对比剂对老年冠状动脉CT血管成像影像质量和辐射剂量影响的研究[J].老年医学与保健,2026,32(2):265-270 |
| 低管电压、低剂量碘对比剂对老年冠状动脉CT血管成像影像质量和辐射剂量影响的研究 |
| A study on image quality and radiation dose of low-tube voltage and low-dose iodine contrast agent in coronary CT angiography of elderly patients |
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| DOI：10.3969/j.issn.1008-8296.2026.02.020 |
| 中文关键词: 老年 冠状动脉CT血管造影 低管电压 低剂量碘对比剂 影像质量 辐射剂量 冠状动脉图像CT值 冠状动脉CT血管成像 |
| 英文关键词: elderly coronary CT angiography low tube voltage low-dose iodine contrast agent image quality radiation dose CT value of coronary artery image |
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| 中文摘要: |
| 目的 探究低管电压、低剂量碘对比剂对老年冠状动脉 CT 血管成像(CTA)的影像质量和辐射剂量的影响.方法 选择2023 年11 月至2024 年7 月淮北市人民医院180 例行冠脉 CTA 检查的受检者作为研究对象,采用随机数字表法将受检者分为A组(n=90,管电压90 kV、碘美普尔300 mgI/mL)和 B 组(n=90,管电压70 kV、碘美普尔300 mgI/mL).比较2 组受检者的冠状动脉图像 CT 值、图像质量及辐射剂量.结果 2 组受检者主观图像质量评分均≥3 分,符合临床诊断要求.2 组受检者主观图像质量比较差异无统计学意义(U=1.885,P=0.059).A 组受检者主动脉 CT 值、信噪比高于 B 组,差异有统计学意义(P<0.05);2 组受检者动脉 CT 值均>300 HU,可满足诊断要求;2 组受检者检查时心率比较差异无统计学意义(P>0.05).B 组受检者有效辐射剂量、剂量长度乘积、容积 CT 剂量指数均显著低于 A 组,差异有统计学意义(P<0.05).结论 采用低管电压(70 kV)与低剂量碘对比剂的成像方案,能够在保证影像质量满足临床诊断要求的同时,显著降低受检者的辐射剂量. |
| 英文摘要: |
| Objective To explore the image quality and radiation dose of low-tube voltage and low-dose iodine contrast agent in coronary CT angiography(CTA)of elderly patients.Methods A total of 180 patients who underwent coronary CTA in People's Hospital of Huaibei City from November 2023 to July 2024 were selected as study subjects.They were randomly divided into group A(n=90,tube voltage 90 kV,iomeprol 300 mgI/mL)and group B(n=90,tube voltage 70 kV,iomeprol 300 mgI/mL)using a random number table.The CT values of coronary arteries,image quality,and radiation dose were compared between the two groups.Results The subjective image quality scores of both groups were≥3 points,meeting clinical diagnostic requirements.It showed no statistically significant difference in subjective image quality between the two groups(U=1.885,P=0.059).The aortic CT values and signal-to-noise ratio in the group A were significantly higher than those in the group B,with statistically significant differences(P<0.05).The arterial CT values of both groups were>300 HU,meeting diagnostic requirements.There was no statistically significant difference in heart rate during examination between the two groups(P>0.05).The effective dose,dose-length product,and CT dose index volume in the group B were significantly lower than those in the group A,with statistically significant differences(P<0.05).Conclusion The imaging protocol of low tube voltage(70 kV)and low-dose iodine contrast agent can not only ensure that the image quality meets the clinical diagnostic requirements,but also significantly reduce the radiation dose of the examinees. |
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