数字化双能量摄影在冠脉钙化诊断中的应用

目的：探讨双能量减影摄影术在诊断冠脉钙化方面的应用。方法：随机抽取2005年5片至2007年4月采用GE公司Revolution XRD平板探测器数字摄影机对920例（年龄大于70岁）受检者行胸部双能量减影摄影的图像，把双能量减影摄影的骨窗像、高管电压数字像中高度怀疑和一般怀疑患有心脏冠脉钙化疾病的146例与16排螺旋CT冠脉扫描的钙化阳性率进行比较。结果：在双能量减影骨窗像中对高度怀疑和一般怀疑患有心脏冠脉钙化疾病的135例和11例受检者行MSCT检查，经16排螺旋CT证实高度怀疑的135例中128例阳性，不能肯定的11例中3例检出阳性。在146例高管电压DR像中对高度怀疑和一般怀疑患有心脏冠脉钙化疾病的12例和134例受检者行MSCT检查，经16排螺旋CT证实高度怀疑的12例中10例阳性，不能肯定的134例中126例检出阳性。结论：双能量减影术在评价冠状动脉钙化方面能提供潜在的重要新信息。

Application of Digital Radiography with Dual-energy Subtraction in Coronary Artery Calcification

Objective To explore the clinical value of digital radiography with dual-energy subtraction in diagnosis of coronary artery and valve calcification. Methods 920 patients(older than 70) was examined by GE Revolution XRD with chest dual-energy subtraction. The positive rate of calcification of 146 patients who were highly or generally suspected for coronary artery calcification in bone window's and high Kilovotor digital graph of dual-energy subtraction were compared with the result of 16 slices MSCT. Results 135 patients with highly suspected coronary artery calcification and 11 patients with generally suspected coronary artery calcification in bone window's digital graph were examined by 16 slices MSCT. In those 135 patients with highly suspected coronary artery calcification, 128 cases were proved to be positive with 16 slices MSCT. In those 11 patients with generally suspected coronary artery calcification, 3 cases were proved to be positive with 16 slices MSCT. In those 12 patients who were positive with coronary artery calcification in high Kilovotor graph, 10 patients were confirmed to have coronary artery calcification in MSCT. In those 134 patients who were negative with coronary artery calcification in DDR, 126 patients were confirmed to have coronary artery calcification in MSCT. Conclusion Dual-energy subtraction digital radiography can offer potentially important new information in the evaluation of coronary artery calcium.