摘要
目的探讨针对Philips iCT如何降低冠状动脉CTA成像的辐射剂量及对比剂使用剂量,而不影响冠状动脉图像质量的最佳扫描方式。方法①对30例心率整齐,心率控制在75次/min以下的患者改变示踪位置,进行低辐射剂量、低对比剂用量冠状动脉成像;②再随机抽取30例常规回顾性心电门控扫描的患者作为对照组进行比较。结果实验组平均对比剂用量为(42.16±6.11)mL,对照组平均对比剂用量为(73.16±3.59)mL,两组对比剂用量有明显差异(P<0.01),有显著性;实验组平均辐射剂量为(4.95±1.09)mSv,对照组为(13.21±0.86)mSv,实验组较对照组射线量明显降低,两组病例冠状动脉成像质量评分差异无显著性(P>0.05),所获图像能满足临床诊断需要;实验组静脉显影干扰评分(4.33±0.58)与对照组静脉显影干扰评分(2.61±0.85),两组静脉显影干扰有明显差异(P<0.01),有显著性。结论在保证图像质量的前提下,采用前瞻性序列扫描技术,改变示踪位置,不仅可大大降低辐射剂量和对比剂使用剂量,还可以减少静脉显影对冠状动脉后处理的干扰。
【Objective】To explore how to reduce Philips iCT CTA coronary artery imaging radiation dose and contrast consumption doses instead of affecting the image quality of coronary artery of the optimal scanning method.【Method】①Tracer locations were changed for 30 cases of patient whose heart rate control under the 75 times per minutes,and low radiation dose,low contrast consumption to image the coronary arteries.②30 cases of conventional retrospectively ECG-gatedscan in patients were selected as compared group.【Results】 The mean contrast consumption amount was（42.16± 6.11） mL of the experimental group,and control group mean contrast agent dose was（73.16 ±3.59） mL,so two groups of contrast consumption had significant difference（P〈0.01）,thus,the experimental group was statistically significant.The average radiation dose was（4.95± 1.09） mSv in the experimental group,（13.21±0.86） mSv in the control group,the experimental group and control group in significantly reduced the ray volume,two group of coronary artery imaging quality score had no statistical significance（P〉 0.05）,and the image can meet the needs of clinical diagnosis.Experimental group had an interference score（4.33 ±0.58） and a control group had（2.61±0.85） scores,and two groups of venous opacification interference had significant difference（P〈0.01）,there was a statistical significance.【Conclusion】On the basis of image quality,using a prospective and changing the tracer position can not only greatly reduce radiation dose and contrast consumption doses,but also reduce venous opacification of coronary artery after processing of interference.
出处
《中国现代医学杂志》
CAS
CSCD
北大核心
2013年第19期26-30,共5页
China Journal of Modern Medicine
