Hu Xiao-Lu, Huang Pei-Kai, Zhang Meng, Chen Jun, Xiao Meng-Qiang
Department of Imaging, Zhuhai Hospital, Guangdong Provincial Hospital of Traditional Chinese Medicine, Zhuhai 650031, Guangdong Province, China.
World J Radiol. 2023 Feb 28;15(2):32-41. doi: 10.4329/wjr.v15.i2.32.
Coronary computed tomography angiography (CCTA) is the preferred non-invasive examination method for coronary heart disease. However, the radiation from computed tomography has become a concern since public awareness of radiation hazards continue to increase.
To explore the value of multiple dose reduction techniques for CCTA.
Consecutive normal and overweight patients were prospectively divided into two groups: Group A, patients who received multiple dose reduction scans ( = 82); and group A, patients who received conventional scans ( = 39). The scan parameters for group A were as follows: Isocentric scan, tube voltage = 80 kV, and tube current control using 80% smart milliampere. The scan parameters for group A were as follows: Normal position, tube voltage = 100 kV, and smart milliampere.
The average effective doses (EDs) for groups A and A were 1.13 ± 0.35 and 3.36 ± 1.30 mSv, respectively. There was a statistically significant difference in ED between the two groups ( < 0.01). Furthermore, noise was significantly lower, and both signal-to-noise ratio and contrast signal-to-noise ratio were higher in group A when compared to group A ( < 0.01). Moreover, the subjective image quality (IQ) scores were excellent in both groups, in which there was no significant difference in subjective IQ score between the two groups ( = 0.12).
Multiple dose reduction scan techniques can significantly decrease the ED of patients receiving CCTA examinations for clinical diagnosis.
冠状动脉计算机断层扫描血管造影（CCTA）是冠心病首选的非侵入性检查方法。然而，由于公众对辐射危害的意识不断提高，计算机断层扫描的辐射已成为一个令人担忧的问题。
探讨CCTA多种剂量降低技术的价值。
将连续的正常和超重患者前瞻性地分为两组：A组，接受多次剂量降低扫描的患者（n = 82）；以及A组，接受传统扫描的患者（n = 39）。A组的扫描参数如下：等中心扫描，管电压 = 80 kV，使用80%智能毫安控制管电流。A组的扫描参数如下：常规体位，管电压 = 100 kV，智能毫安。
A组和A组的平均有效剂量（ED）分别为1.13±0.35和3.36±1.30 mSv。两组之间的ED有统计学显著差异（P < 0.01）。此外，与A组相比，A组的噪声显著更低，信噪比和对比信噪比更高（P < 0.01）。此外，两组的主观图像质量（IQ）评分均为优秀，两组之间的主观IQ评分无显著差异（P = 0.12）。
多种剂量降低扫描技术可显著降低接受CCTA检查用于临床诊断的患者的ED。
