CT低剂量技术在冠状动脉钙化积分检查中的应用现状与新进展

冠状动脉钙化积分(CACS)是无创性评估心血管风险分层及冠心病发生、发展和预后的一项重要指标,可以辅助临床治疗策略的选择制定。遵从辐射防护最优化原则(ALARA),可以采用直接方法(降低管电流、管电压,自动管电流调制技术)、间接方法(大螺距、迭代重建技术),以及直接在冠状动脉CT血管成像、双能CT虚拟平扫和非心电门控胸部CT平扫影像上测量CACS,从而降低该检查辐射剂量,并可准确、可重复地测量CACS,进行心血管风险分层。

Low dose CT technology in coronary artery calcium score: application status and new progress

Coronary artery calcium score (CACS) is an important non-invasive indicator to assess cardiovascular risk stratification, occurrence, development and prognosis of coronary heart disease. Complied with the principle' as low as reasonably achievable' (ALARA), direct method (reduced tube current and tube voltage, and automatic tube current modulation), indirect method (large pitch and iterative reconstruction), direct measurement on images from coronary CT angiography (CCTA), and virtual unenhanced images derived from dual-energy CCTA and images from chest CT scan without ECG-gated, were adopted in order to reduce radiation. With those techniques, risk stratification of cardiovascular events can be evaluated accurately and repeatedly at as low radiation dose as possible.