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冠状动脉钙化(CAC)是动脉内膜粥样硬化的标志。以往多用X线透视观察,但敏感性低。 作者使用Imatron C-100CT机(超高速CT机-UFCT),自心底部冠状动脉近端连续向足侧扫描20层,层厚3mm,时间100ms,应用心电门控,每于舒张期相当80％RR间期时扫描。患者在整个20层扫描期间屏气。获得图象后看定位准确与否,必要时加扫层面。然后对钙化评分:每一病灶的面积(mm~2)乘以其CT峰值即为该病灶的钙化分数。钙化评分由冠状动脉主要分支(左主支、左前降支、左旋支和右
Coronary artery calcification (CAC) is a sign of arterial atherosclerosis. X-ray fluoroscopy in the past, but the sensitivity is low. The author uses Imatron C-100CT machine (ultra-high speed CT machine-UFCT), from the bottom of the coronary artery to the foot side of the continuous scanning of 20 layers, layer thickness 3mm, time 100ms, the application of ECG gating, each diastolic equivalent to 80 % RR interval scan. The patient holds the breath during the entire 20-layer scan. After obtaining the image to see the positioning accuracy or not, if necessary, plus scan level. Then the calcification score: the area of each lesion (mm ~ 2) multiplied by the CT peak value is the lesion calcification score. The calcification score consists of major coronary artery branches (left main branch, left anterior descending branch, left branch and right branch)