摘要
目的探讨128层双源CT3种扫描模式下冠状动脉CT血管造影(CTA)的显像价值差异。方法选取行冠状动脉CTA检查的123例患者为研究对象,采用随机数字表法将其分成A、B、C三组,每组各41例。A组采用回顾性心电门控低螺距螺旋(LS)模式扫描,B组采用前瞻性心电触发序列(S)模式扫描,C组采用的高螺距螺旋(FS)模式扫描。比对三组患者不同扫描模式下图像质量、扫描时间、辐射剂量长度乘积(DLP)及有效剂量(ED)差异。结果 1根据15段分法,此次入组的123例患者共评价1736个冠状动脉节段,三组患者图像质量主观评分及图像质量优良率对比均无统计学意义(P>0.05);2三组患者中A组扫描时间、DLP及ED均显著高于其他两组,其次为B组,C组则最低,组间对比差异具有统计学意义(P<0.05)。结论 128层双源CT的LS、S、FS等三种扫描模式均具有理想的显像价值,图像质量良好;其中FS模式较S及LS模式辐射剂量较低,可作为实现低辐射剂量冠状动脉CTA检查的有效手段应用于临床诊疗工作中,以提升患者预后水平。
Objective To investigate the difference in coronary CT angiography（CTA） imaging value under 128 slice dual source CT 3 scan mode. Methods 123 patients who underwent CTA examination were taken as the research objects. According to the random number table method, the patients were divided into A, B, C of three groups with 41 cases in each group. Group A was canned with a retrospectively ECG-gating low pitch spiral（LS） mode. Group B was scanned with a prospective ECG triggering sequence（S） mode and group C was scanned with a high pitch spiral（FS） mode. The image quality, scanning time, radiation dose length product（DLP） and effective dose（ED） under different modes were compared among the three groups. Results 1According to 15 segment division method, the enrolled 123 patients were evaluated with 1736 coronary artery segments. The differences in subjective score and good and excellent rate of image quality among the three groups were not statistically significant（P〉0.05）; 2Among the three groups, the scanning time, DLP and ED of group A were significantly higher than those of the other two groups, followed by group B and group C was the lowest. The differences between groups were statistically significant（P〈0.05）. Conclusion The LS,S and FS of three kinds of scanning modes of 128 slice dual source CT are of ideal imaging value and the image quality is good; The radiation dose of FS mode is lower than that of S and LS mode. It can be used as an effective means of low radiation dose coronary CTA in the clinical diagnosis and treatment to improve the prognosis level of patients.
出处
《中国CT和MRI杂志》
2015年第12期22-24,47,共4页
Chinese Journal of CT and MRI
