Diagnostic Accuracy of 64-Slice Spiral CT for Detecting Coronary Artery Stenosis Comparis on with Convention Alangiography

Objective To evaluate the accuracy and feasibility of 64-slice spiral CT in detecting coronary artery stenoses.Methods Forty-five patients[29 male,16 female;aged 60～86(73.1±5.3)years]with suspected coronary artery disease underwent coronary angiography and 64-slice spiral CT.The meantime span between coronary angiography(CAG)and CT angiography(CTA) was 7days.Evaluation of right coronary artery(RCA),left main(LM),left anterior descending artery(LAD),and circus flex branch(CX),was performed by two.All vessels with a lumenre striction of50% was considered as a significant stenosis.Invasive coronary angiography was taken as gold mark for calculations of diagnostic accuracy.Results The sensitivity,specificity,positive predictive value,negative predictive value and accuracy of 64-slice spiral CT coronary angiography in diagnosing50% coronary stenosis was 94.0%,94.0%,69.6%,94.0% and 78.8% respectively.Conclusion The 64-slice spiral CT coronary angiography is an effective and noninvasive examining technique with high image quality.It could be used in diagnosing accurately CHD.