Coronary Angiography with 16-slice Spiral CT:a Study of Technique and Clinical Application / 实用放射学杂志

ABSTRACT

Objective To evaluate the main scanning technique and clinical value of 16-slice spiral CT coronary angiography(CTCA).Methods Plain and enhanced imaging were performed by retrospective ECG gating in 76 patients,including 65 cases suspected coronary artery disease,8 cases of coronary stent and 3 cases of coronary bypass graft.Post-processing was conducted with VesselView soft package,in which MPR,MIP,VRT and section plane of conoray artery were made in all cases,among them 35 cases underwent selective coronary angiography(SCA) as a comparision.These main segments(vessel diameter≥2 mm) in CTCA were compared with SCA,and≥50% reduction of vessel diameter was defined as significant disease.Results 85.1% of the coronary segments in CTCA were accessible and could accurately displaye the patency of the coronary arteries and the pathological changes in vessel walls.In comparison with SCA,the sensitivity and specificity were 86.5% and 95.1% respectively. When 46 coronary artery segments judged unevaluable were included in the analysis,the sensitivity was 78.0%(32/41).Conclusion 16-slice CTCA can display long segment of coronary artery and assess coronary artery disease with high accuracy,which has highly clinical value.