The Value Of Dual-source Coronary Computed Tomography Angiography For Assessment Of In-stent Restenosis

Objective To assess the accuracy and the clinical value of dual-source computed tomography (DSCT) for detecting in-stent restenosis of the coronary arteries.Methods Forty-two patients after stent implantation were examined with siemens SOMATOM Definition DSCT. Scanning was undertaken by electrocardiographically gatedand an automatic bolus-tracking method. For better image reconstruction, two algorithms (kernel B46f and kernel B46f) were applied. All stents were assessed by two observers in consensus. Conventional coronary angiography was performed in 26 patients(49 stents) were evaluated so that to analyze the sensitivity, specificity, positive predictive value and negative predictive for detection of restenosis≥50% with DSCT coronary angiography.Results Totally 46 patients (76 stents) were identified in DSCT, the rate of identification is 100%(76/76). Sensitivity, specificity, positive predictive value and negative predictive value was 100%, 88.9%, 76.5% and 100% for DSCT to identify in-stent restenosis, respectively. Sensitivity,specificity,positive predictive value and negative predictive value was 87.5%,95.1%,77.8%and97.5% for identifying in-stent restenosis≥50%, respectively.Conclusion Dual-source CT has high diagnostic accuracy for detecting in-stent restenosis, indicating and suggesting as a useful tool for the follow up after coronary stenting.