Multi-center Study on the Relationship between CCTA Examination Modes and Radiation Dose
GUO Dao-de1, LI Yan1, BAI Hua2, ZHANG Wan-shi3, YAN Shu-lin4, JIN Ling1,LI Qian-wen1, WANG Chen1, YAO Xin-yu1,5, DU Xiang-ying1, CHEN Nan1, LI Kun-cheng1,5
1. Xuanwu Hospital, Capital Medical
University, Beijing 100053, China; 2.
Fu Wai Hospital, Chinese Academy of
Medical Science, Beijing 100037, China;
3. People’s Liberation Army Air Force
General Hospital,, Beijing 100142, China;
4. Beijing Tongren Hospital, Capital
Medical University, Beijing 100005,
China; 5.Medical Imaging Quality Control
and Improvement Center, Beijing 100053,
China
Abstract：Objective This study is to investigate the relationship between different coronary computed tomography angiography (CCTA) examination modes and the radiation dose, in order to achieve as low as reasonable radiation dose, guiding and regulating the legitimation and optimization of coronary CTA examination. Materials and Methods Analyzed the effects of different models of MSCT and different scanning modes for coronary CTA on radiation dose in 30 tertiary hospitals of Beijing. All cases were divided into different groups according to CT models (general 64-slice CT and post 64-slice CT) and scanning modes (prospective ECG-triggering axial acquisition mode, retrospectively ECG-gated spiral data acquisition mode and prospectively ECG-gated high-pitch spiral acquisition mode). Achieved the mean values of CTDI, DLP and ED respectively and using independent sample t-test to analyze the radiation dose difference between different models and scanning modes. Results The statistical data on CTDI, DLP and ED of the post 64-slice CT is（27.61±19.61）mGy、(412.56±328.74) mGy?cm、(5.78±4.60) mSv, respectively, lower than those of the general 64-slice CT (57.09±27.58 ) mGy、(950.93±552.91) mGy?cm、(14.53±8.81) mSv, and the difference was statistically significant (P < 0.05). The mean values of CTDI,DLP and ED were (17.98±11.27) mGy、(229.63±158.31) mGy?cm、(3.24±2.20) mSv in the prospective ECG-triggering axial acquisition mode group, retrospectively, while the mean values of CTDI, DLP and ED in ECG-gated spiral data acquisition mode group were (50.89±25.01) mGy、(839.80±469.56) mGy?cm、(12.40±7.42) mSv, respectively , the difference was statistically significant (P < 0.05). Conclusion Post 64-slice CT and low-dose scanning mode are both helpful for radiation dose reduction in coronary CTA.
郭道德，李岩，白桦，张挽时，燕树林，金玲，李倩文，王臣，姚新宇，杜祥颖，陈楠，李坤成. 冠脉CTA检查方式对辐射剂量影响的多中心研究[J]. 中国医疗设备, 2014, 29(1): 16-18.
GUO Dao-de, LI Yan, BAI Hua, ZHANG Wan-shi, YAN Shu-lin, JIN Ling,LI Qian-wen, WANG Chen, YAO Xin-yu, DU Xiang-ying, CHEN Nan, LI Kun-cheng. Multi-center Study on the Relationship between CCTA Examination Modes and Radiation Dose. China Medical Devices, 2014, 29(1): 16-18.
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