CT低剂量冠状动脉成像的管电流与管电压参数优化现状

Low-dose CT Coronary Angiography with Status Quo of Tube Current and Voltage Parameters Optimization

随着64排以上多层螺旋CT(MSCT)和双源CT(DSCT)的飞速发展,CT冠状动脉成像(CTCA)以其无创、便捷、低风险和低费用等优越性,在临床上得到了越来越广泛应用。但较复杂的心脏血管成像,往往伴随着较高的辐射剂量,因此这就大大地增加了患恶性肿瘤的几率。近年来,CTCA辐射量的问题得到了不少学者的关注,对如何低剂量CTCA做了大量的研究,而管电流与管电压的调节在CT低剂量冠状动脉成像起着重要作用,本文综述了当前管电流与管电压参数优化应用的总体状况,并认为在保证CTCA图像质量的前提下,对于体重指数正常、心率稳定、冠状动脉钙化总评分在100AU以下的患者,采用降低管电压扫描可明显减少辐射剂量,若再联合应用ECG调制电流曝光技术,将进一步减少辐射剂量。但对于肥胖体重、心律不齐及钙化较多者则不适用低剂量CTCA检查。

With the rapid development of the 64-row multi-slice spiral CT （MSCT） and dual-source CT （DSCT）, CT coronary angiography （CTCA） for its non-invasive, convenient, low-risk and low-cost superiority in clinicalhas has been more widely used. But more complex cardiovascular imaging, often accompanied by higher radiation doses, which greatly increases the chance of suffering from malignant tumors. In recent years, CTCA radiation problem has been the concern of many scholars, the study of how low-dose CTCA done a lot of tube current and tube voltage regulation plays an important role in the CT low-dose coronary angiography, this paper reviews the current overall condition of the tube current and tube voltage parameter optimization applications, and that under the premise of ensuring the CTCA image quality for normal body mass index, heart rate and stable coronary artery calcification score in patients less than 100 AU, the use of lower tube voltage scan significantly reduce the radiation dose, if more combined ECG modulation current exposure technology will further reduce the radiation dose. However, higher obesity, weight, cardiac arrhythmia and calcification do not apply to low-dose CTCA check.