摘要
目的:探讨采用低管电压技术和低剂量对比剂(双低)进行64排螺旋CT冠状动脉检查的可行性。方法:采用GE公司宝石能谱CT Discovery CT750 HD,选取心率≤70次/min,节律规则的25例临床疑似冠心病患者,随机分为两组进行回顾性心电门控CTA检查,其中实验组11例,采用100kVp管电压,碘克沙醇(威视派克,270mg/ml)对比剂;对照组14例,采用120kVp管电压,碘普罗胺(优维显,370mg/ml)对比剂。对比分析两组冠状动脉图像CT值、图像质量、对比剂用量及辐射剂量。结果:实验组及对照组受检者均满足诊断要求,纳入统计冠状动脉节段分析显示,两组冠状动脉图像CT值差异有统计学意义;研究组平均有效辐射剂量为(8.97±1.78)mSv,对照组为(12.20±4.03)mSv,两组辐射剂量比较差异有统计学意义(P<0.05)。研究组对比剂用量16200mg,较对照组降低;而两组冠状动脉段图像质量比较差异无统计学意义(P>0.05)。结论:"双低"冠状动CTA成像有效降低对比剂用量和辐射剂量但图像质量不变,在心率较低的受检者中具有推广价值。
Purpose： To evaluate the feasibility of low tube voltage and low dosage contrast medium protocol in 64-slice CT coronary CT angiography （CCTA） by using retrospective electrocardiographic （ECG） triggering. Methods： Totally 25 patients with coronary disease underwent CCTA were included. All patients were randomly divided into experimental group （11 patients） with 100kVp and Iodixanol （270mgI/ ml）, and control group （14 patients） with 120kVp and Iopromide （370mgI/ml）. The following data, including image quality, CT value, contrast medium dosage and average radiation dose were analyzed between the 2 groups （p〉0.05）. Results： No difference of the image quality were shown between these two groups. The CT value in experimental group was higher, and there was statistical difference between 2 groups on CT values （P〈0.05）. The average radiation dose was （8.97±1.78） mSv in the experimental group and （12.20±4.03） roSy in the control group （p〈3.135）. The contrast medium dosage in experimental group was 16200mgI. There was statistical difference of contrast medium dosage between 2 groups （p〈0.05）. Conclusion： Low tube voltage and low dosage contrast medium can also achieve the result as the conventional protocol as well and can significantly reduce the radiation dose and contrast medium dosage.
出处
《中国医学计算机成像杂志》
CSCD
北大核心
2013年第5期406-409,共4页
Chinese Computed Medical Imaging
关键词
体层摄影术
X线计算机
血管造影术
管电压
对比剂
Tomography
X-ray computed
Cerebral angiography
Tube voltage
Contrast medium
