Primary evaluation of the clinical feasibility of low-dose coronary artery imaging with flash dual-source dual-energy CT
10.3969/j.issn.1002-1671.2016.08.030
- VernacularTitle:炫速双源 CT 低剂量双能量冠状动脉成像技术初探
- Author:
Chaoran LIU
;
Dan HAN
;
Jie JIANG
;
Xiaolong PAN
;
Yiren JIN
;
Wei ZHAO
- Publication Type:Journal Article
- Keywords:
dual-energy;
computed tomography;
angiography;
coronary artery
- From:
Journal of Practical Radiology
2016;32(8):1277-1281
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the value of low-dose coronary artery imaging with flash dual-energy CT.Methods In total of 240 patients suspected with coronary heart disease were performed dual-energy CCTA(DE-CCTA)and were divided into four groups according to the A tube electric current and the methods of reconstruction,including group A(conventional group:180 mAs+FBP)and low-dose groups(including group B,C,D:1 50 mAs,120 mAs,90 mAs +SAFIRE,respectively).The mean of CT value, image noise,SNR,CNR,image quality and radiation dosage were compared among the four groups.Among the patients,52 cases with coronary artery stenosis which were diagnosised by DE-CCTA were also confirmed by CAG,and the consistency of these two methods in the diagnosis of coronary artery stenosis were compared.Results The scores of all image quality were more than 3 points and were statistically significant among the four groups(P <0.05).The mean of CT value is not statistically significant (P >0.05), while the image noise,SNR,CNR and the radiation dosage were statistically significant (P <0.05)among the four groups.The ED of group D was lower 55.62% than group A.DE-CCTA and CAG in the diagnosis of coronary artery stenosis had satisfactory consistency (Kappa=0.84,P<0.05).Conclusion Low-dose coronary artery DE-CCTA not only have none affect of image quality and diagnostic accuracy, but also can significantly reduce the radiation dosage.
