ABSTRACT Objective: On the premise that the image quality meets the requirements of clinical diagnosis, we explored the methods to reduce the radiation dose of coronary artery imaging with Dual-Source CT (DSCT). Methods: We randomly selected 200 patients with coronary heat disease (BIM<25kg/m2), applied the scanning technology of regulating the dose of heart electric pulse (AUTO) on the 100 patients in group A. In this group for different heart rate we chose different full dose exposure time window. For the 100 patients in group B, we used conventional full dose (OFF) scan mode. The DSCT automatically selected the best time and phase to reconstruct the image. We used the 5 point system to evaluate the image quality, measured and compared the image noise and radiation dose. When P<0.05, the differences between the two groups have statistical significance. Results: The image quality scores between the two groups showed no significant difference (P > 0.05). The average image noise in group A is (41.76 ± 7.98) HU, in group B the average image noise is (43.97 ± 3.88) HU, the dif- ference between the two groups was not statistically significant (P>0.05). The average CTDIvol of group A and B were (20.63 ± 2.24) mGy, (38.11 ± 10.69) mGy, respectively, then P <0.01. The average DLP of group A and B are (235.75 ± 28.64) mGycm and (492.59 ± 125.49) mGycm respectively, then P <0.01, the dif- ference of radiation dose had statistical significance (P<0.05). Conclusions: For coronary artery imaging with DSCT the heart electric pulse (AUTO) regulation technology can meet the diagnostic requirements and effectively reduce the radiation dose.
Cite this paper
Huang, Z. , Xiao, B. and Zhong, L. (2013) Exploration the Method of Low Dose Coronary Artery Imaging with Dual-Source CT. Journal of Biosciences and Medicines, 1, 6-10. doi: 10.4236/jbm.2013.11002.
 Lei ZHUANG, Jihong GAN, Jianjun LIU. Diagnosis of coronary artery disease by dual source CT coronary angiography. Medical Journal of National Defending Forces in Northwest China, 2010, 31 (4): 273-275.
 Yuan Zhao, Hong Pu. Comparatively Studying the Application of Dual Source CT in Coronary Angiography. Journal of Sichuan Continuing Education College of Medical Sciences. 2009, 28 (2): 87-89.
 Yan Gao. Exploration of the low dose technique in the examination of the coronary arteries angiography with dual-source CT. Sichuan Medical Journal, 2009, 30(12):1967-1969.
 Chiwei Wang. The current study of Dual-source CT coronary artery imaging. Anhui Medical Journal, 2010, 31(10): 1256-1258.
 Renwei Liu. Research Progress of Dual-source Computed Tomography (DSCT) Low-dose Coronary Angiography. Medical Recapitulate, 2009, 15(21):3317-3320.
 Jiong Li. The application of optimizing scan parameters of Dual-Source CT in coronary artery imaging for reducing radiation dose. Nei Mongol Journal of Traditional Chinese Medicine, 2012, 10:82-83.
 Lifeng Zhang, Maoyi Zhou, Li Yang. Influence of coronal arterial image quality of 64 detector row CT in patients with ECG-gated scanned and optimal R-R phase imaging reconstructed. Chinese Journal of Medical Imaging Technology, 2008, 24(1):88-91.
 Wanshi Zhang, Jiaxing Xu. See Development of Low-dose CT from RSNA 2008. China Medical Device Information, 2009, 7(1):12-13.
 Aijun Wang, Jianguo Zhao, Xuejun Ping. The comparison of two different methods of coronary artery imaging in Dual-Source CT. Journal of Ningxia Medical College, 2010, 32(3): 443-445.
 Zixu Yan, Zhaoqi Zhang. Low tube voltage in reduction of radiation dose in dual-source CT coronary angiography. Chinese Journal of Medical Imaging Technology, 2009, 25(9): 1614-1616.
 Weiwei Qi, Xiangke Du, Ying Guo. A method to optimize the selection of tube current for consistent image noise and dose control in 64-slice spiral helical CT cardiac imaging. Image Technology, 2008, 452(10):1026-1030.
 Xiaoyang Chen, Jiankun Zhai, Hui Li. Clinical application and radiation prevention of CT scanning technology. China Modern Medicine, 2010, 17(8):61-62.
 Gou Wenjing, Shiyuan Liu, Hong Yu. Strategy and research progress in coronary computed tomography angiography with low-dose scan. International Journal of Medical Radiology, 2012, 35(2): 147-150.
 Hausleiter J，Meyer T，Hermann F. Estimated radiation dose associated with cardiac CT angiography. JAMA，2009, 301:500-700.
 Yan Qi, Shuang Qi. The application study of Dual-Source CT in cardiac imaging. Chinese Heart Journal, 2010, 22(2):302-304.