Department of Radiology, Research Institute of Radiological Science, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemun-gu, Seoul, Korea.
J Cardiovasc Comput Tomogr. 2012 May-Jun;6(3):184-90. doi: 10.1016/j.jcct.2012.04.002. Epub 2012 Apr 6.
The use of Automatic Tube Potential Selection with Tube Current Modulation (APSCM) may lower radiation dose, but it is unknown whether image quality is maintained.
The aim of this study was to evaluate the radiation dose and image quality of APSCM application compared with conventional body mass index (BMI)-based examination protocol for coronary computed tomography angiography (CTA).
Consecutive patients (n = 487) were retrospectively enrolled: 239 patients who underwent coronary CTA with APSCM (APSCM group) and 248 patients who underwent coronary CTA with a BMI-based tube potential (in kV) and tube current-time product (in mAs) protocol (BMI-based group). Comparison of quantitative and qualitative image quality and radiation dose was performed.
The use of APSCM found significant reduction in radiation dose compared with the BMI-based protocol, with a significantly more frequent use of 80 kV (P < 0.0001). Diagnostic image quality was maintained, with no significant difference between the 2 groups (P = 0.887).
The use of APSCM for coronary CTA significantly reduced radiation dose while maintaining image quality; therefore, it is feasible in daily practice which covers patients with various BMI values.
自动管电压选择联合管电流调制（APSCM）的应用可能会降低辐射剂量，但目前尚不清楚其图像质量是否得到维持。
本研究旨在评估 APSCM 应用与常规基于体质量指数（BMI）的冠状动脉 CT 血管造影（CTA）检查方案相比的辐射剂量和图像质量。
回顾性纳入连续患者（n=487）：239 例接受 APSCM 冠状动脉 CTA（APSCM 组）和 248 例接受基于 BMI 的管电压（kV）和管电流-时间乘积（mAs）方案的冠状动脉 CTA（BMI 组）。对定量和定性图像质量和辐射剂量进行了比较。
与 BMI 方案相比，APSCM 的应用可显著降低辐射剂量，80kV 的应用频率明显更高（P<0.0001）。两组之间的诊断图像质量没有显著差异（P=0.887）。
APSCM 用于冠状动脉 CTA 可显著降低辐射剂量，同时保持图像质量；因此，在覆盖各种 BMI 值的患者中，该方法在日常实践中是可行的。
