| Cao Ximing,Zheng Junhui,Li Jinglei,et al.The study on reducing radiation dose in coronary CT angiography for patients with arrhythmia using absolute phase and narrow window in prospective electrocardiogram-gating[J].Chinese Journal of Radiological Medicine and Protection,2022,42(9):716-721 |
| The study on reducing radiation dose in coronary CT angiography for patients with arrhythmia using absolute phase and narrow window in prospective electrocardiogram-gating |
| Received:May 27, 2022 |
| DOI：10.3760/cma.j.cn112271-20220527-00227 |
| KeyWords:Coronary angiography Arrhythmia Radiation dose Image quality Absolute phase |
| FundProject: |
| Author Name | Affiliation | E-mail | | Cao Ximing | Department of Radiology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou 510080, China | | | Zheng Junhui | Department of Radiology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou 510080, China | 13610226812@163.com | | Li Jinglei | Department of Radiology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou 510080, China | | | Wu Zibin | Department of Radiology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou 510080, China | | | Wang Zhenbang | Department of Radiology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou 510080, China | |
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| Abstract:: |
| Objective To investigate the feasibility of reducing radiation dose in coronary CT angiography for patients with arrhythmia with absolute phase and narrow window in prospective electrocardiogram-gating.Methods 200 patients with arrhythmia underwent coronary CT angiography procedure with prospective electrocardiogram-gating adaptive sequence in dual source CT were randomly divided into 2 groups according to the scan mode.Group A was scanned with absolute phase and narrow window (250-450 ms) and group B uesd relative phase and wide window (30%-75%).The other parameters and injection protocol of contrast media were the same in 2 groups.Both image quality and radiation dose of the 2 groups were analyzed.Results No significant difference of image quality was found between the 2 groups.CTDIvol,DLP,E of group A were all lower than those in group B[CTDIvol:(16.71±8.35)vs.(29.35±17.90) mGy,DLP:(231.04±114.86)vs.(398.27±238.40) mGy ·cm,E:(3.23±1.60)vs.(5.57±3.33) mSv,t=-6.40,-6.32、-6.32,P<0.05].The patients with repeat scan cycles in group A and group B were 81 vs. 22 for 0 cycle,17 vs. 62 for 1 cycle,2 vs. 10 for 2 cycles,0 vs.6 for 3 cycles (χ2=70.76,P<0.05).Conclusions The prospective electrocardiogram-gating adaptive CCTA sequence with absolute phase and narrow window can reduce radiation dose while the image quality meets the requirementsfor patients with arrhythmia. |
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