ABSTRACT
Objective:To compare diagnostic effect between coronary CT angiography (CTA) and intravascular ultra-sound (IVUS) for coronary calcified lesion .Methods:A total of 50 patients ,who were diagnosed as coronary heart disease (CHD) or suspected CHD in our hospital ,were selected .All patients received coronary CTA and IVUS ex-amination .Characteristics of coronary artery plaques and CT values of different types of plaques were observed , coronary CTA diagnostic effect was evaluated according IVUS as control .Results:There were no significant differ-ence between two methods in plaque area ,plaque burden and lumen area;CT value of calcified plaques was signifi-cantly higher than those of fibrous plaques and fatty plaques [ (725.68 ± 68.42) Hu vs .(58.12 ± 7.05) Hu ,(60.21 ± 6.78) Hu ,P<0.01 both];Sensitivity ,specificity ,accuracy ,positive predictive value and negative predictive val-ue of coronary CTA for diagnosing calcified plaques were 92. 86% ,92. 86% ,92. 86% ,81. 25% and 97. 50% respec-tively .Conclusion:Coronary CT angiography possesses higher diagnostic effect for qualitative and quantitative de-tection of coronary calcified lesions ,which can be regarded as a preferred screening method .