[1]尹晓霞,张振明,董险峰,等.小剂量造影剂联合不同电压对CT肺动脉造影图像质量的影响[J].中国医学物理学杂志,2020,37(11):1389-1393.[doi:DOI:10.3969/j.issn.1005-202X.2020.11.009]
　YIN Xiaoxia,ZHANG Zhenming,DONG Xianfeng,et al.Effects of low-dose contrast agent combined with different voltage on image quality of CT pulmonary angiography[J].Chinese Journal of Medical Physics,2020,37(11):1389-1393.[doi:DOI:10.3969/j.issn.1005-202X.2020.11.009]
点击复制

小剂量造影剂联合不同电压对CT肺动脉造影图像质量的影响()
分享到：

《中国医学物理学杂志》[ISSN:1005-202X/CN:44-1351/R]

卷:
37
期数:
2020年第11期
页码:
1389-1393
栏目:
医学影像物理
出版日期:
2020-12-02

文章信息/Info

Title:
Effects of low-dose contrast agent combined with different voltage on image quality of CT pulmonary angiography
文章编号:
1005-202X（2020）11-1389-05
作者:
尹晓霞; 张振明; 董险峰; 李立强; 曾凡学; 杜小蕊; 王海滨
滦州市人民医院影像科， 河北 滦州 063700
Author(s):
YIN Xiaoxia;  ZHANG Zhenming;  DONG Xianfeng;  LI Liqiang;  ZENG Fanxue;  DU Xiaorui;  WANG Haibin
Department of Medical Imaging, Luanzhou Peoples Hospital, Luanzhou 063700, China
关键词:
肺动脉栓塞; CT肺动脉造影; 造影剂; 管电压
Keywords:
Keywords: pulmonary embolism CT pulmonary angiography contrast agent tube voltage
分类号:
R811.1
DOI:
DOI:10.3969/j.issn.1005-202X.2020.11.009
文献标志码:
A
摘要:
目的：观察小剂量造影剂联合不同电压对CT肺动脉造影（CTPA）图像质量的影响。方法：选取2016年1月至2018年5月在滦州市人民医院就诊高度怀疑为肺动脉栓塞患者90例，拟行CTPA明确诊断，以随机数字表法分为A、B、C组，造影剂、电压不同。A组电压为120 kV，造影剂剂量为50 mL；B组电压为100 kV，造影剂剂量为50 mL；C组电压为80 kV，造影剂剂量为30 mL。3组均基于自动管电流调制技术设置管电流，其他参数一致。对比各组图像质量及辐射剂量。结果：B、C组肺动脉主干、左右肺动脉、肺段动脉CT值均明显高于A组，信噪比与对比噪声比均明显低于A组（P<0.05）。3组患者的图像质量主观评分均能达到3~6分，且评分未见统计学差异（P>0.05）。B、C组扫描后实际容积CT剂量指数、扫描长度与剂量长度之积及有效剂量明显低于A组（P<0.05）。结论：与传统扫描条件比较，小剂量造影剂联合低管电压（80 kV）扫描条件下行CTPA检查可在明显降低造影剂剂量的同时保证图像质量，有效减少辐射剂量。
Abstract:
Abstract: Objective To observe effects of low-dose contrast agent combined with different voltage on image quality of CT pulmonary angiography (CTPA). Methods 90 suspected cases of pulmonary embolism in Luanzhou Peoples Hospital from January 2016 to May 2018 were sampled and conducted CTPA to confirm the diagnosis. The sample was divided into group A, B and C by random number table method. Group A was given 120 kV voltage and 50 mL contrast agent, group B 100 kV voltage and 50 mL contrast agent, and group C 80 kV voltage and 30 mL contrast agent. The automatic tube current modulation technique was applied to set different tube currents for the three groups, and the other parameters are invariant. The different image qualities and radiation doses were finally identified in the three groups. Results CT values of pulmonary artery trunk, left & right pulmonary artery, and pulmonary artery segment in group B and C were significantly higher than those in group A, while signal noise ratio and contrast noise ratio were significantly lower than those in group A (P<0.05). All the three groups subjective scores of image quality have reached 3 to 6 points, and there was no statistically significant difference (P>0.05). After scan, actual volume CT dose index and dose-length product and effective dose in group B and group C were significantly lower than those in group A (P<0.05). Conclusion Compared with traditional scan conditions, CTPA of low-dose contrast agent combined with low-tube voltage (80 kV) can ensure the image quality and reduce the radiation dose with a significant reduction of contrast agent dose.

备注/Memo

备注/Memo:
【收稿日期】2020-03-13 【基金项目】河北省医学科学研究重点课题（20181378） 【作者简介】尹晓霞，研究方向：医学影像，E-mail: wcnttyyy@163.com 【通信作者】张振明，硕士，副主任医师，研究方向：医学影像，E-mail: 21682367@qq.com
更新日期/Last Update: 2020-12-02