Application of Automatic Tube Voltage Combined with Automatic Tube
Current Techniques in Coronary CT Angiography
ZHANG Yu, HE Changjiu, YANG Mengxi, ZHOU Peng, HU Shibei
Department of Radiology, Sichuan Cancer Hospital, Sichuan Cancer Center, University of Electronic Science and Technology of
China, Chengdu Sichuan 610041, China
Abstract：Objective To investigate the application of automatic tube voltage combined with automatic tube current techniques
in coronary CT angiography (CCTA). Methods A total of 90 patients who underwent CCTA in our hospital were retrospectively
collected and divided into group A (n=43) and group B (n=47) according to scanning parameters. Fixed tube voltage combined with
automatic tube current (tube voltage 100 kV, reference tube current 370 mAs) and automatic tube voltage combined with automatic
tube current (tube voltage 100 kV, reference tube current 370 mAs) were used in group A and group B, respectively. The subjective
score of image quality, coronary attenuation, noise, contrast to noise ratio (CNR), tube voltage, tube current, volume CT dose index
(CTDIvol), dose length product (DLP), and effective dose (ED) were compared. Results The subjective scores of image quality of
two groups were all ≤ 3 scores, which could meet the requirements of clinical diagnosis. There were no significant differences in
subjective score and CNR between two groups (P>0.05). The coronary CT value and noise of group B were higher than those of group
A, and the differences were statistically significant (P<0.05). In terms of radiation dose, the tube current of group B was higher than
those of group A, while the tube voltage, CTDIvol, DLP, and ED of group B were lower than those of group A, the differences were
statistically significant (P<0.05). ED of group B was significantly reduced compared with group A [(1.9±0.7) mSv vs. (2.9±0.9) mSv].
Conclusion Automatic tube voltage combined with automatic tube current can ensure image quality and at the same time
significantly reduce radiation dose in CCTA.
张宇，何长久，杨梦犀，周鹏，胡仕北. 自动管电压联合自动管电流在冠状动脉
CT血管成像中的应用[J]. 中国医疗设备, 2023, 38(5): 115-119.
ZHANG Yu, HE Changjiu, YANG Mengxi, ZHOU Peng, HU Shibei. Application of Automatic Tube Voltage Combined with Automatic Tube
Current Techniques in Coronary CT Angiography. China Medical Devices, 2023, 38(5): 115-119.
