Further Improving Image Quality of Coronary CT Angiography and Evaluation Value of Restenosis Patients after PCI with Snap Shot Freeze Technique
Objective To explore the role of coronary artery snap shot freeze technique(SSF)in improving the image quality of CCTA after PCI and its efficacy in evaluating in-stent restenosis.Methods A total of 127 patients,who had 179 stents implanted as part of a coronary stent placement procedure at our hospital between May 2020 and October 2022,were incorporated into the subsequent follow-up assessment.According to the heart rate,it is divided into high heart rate group(heart rate＞70 beats/min)and low heart rate group(heart rate ≤70 beats/min)conventional and SSF techniques were both performed.Among them,71 patients(106 stents in total)underwent coronary angiography within 3 months after operation.To compare the subjective scores of CTA image quality of coronary artery stent reconstructed by the two reconstruction techniques.Using coronary angiography as the"gold standard"to compare the consistency and diagnostic efficacy of conventional and SSF reconstruction techniques in evaluating coronary stenosis.Results The average image quality score of coronary stents reconstructed by conventional technique in high heart rate group was(3.38+0.75),SSF technique was(3.810.467).The average image quality score of coronary stents reconstructed by conventional technique in low heart rate group was(3.980.458),SSF technique was(4.380.490).Based on the results of coronary angiography,the sensitivity,specificity,positive predictive value,negative predictive value and accuracy of conventional technique group were 80.56％,97.14％,93.54％,90.67％and 91.51％respectively.The sensitivity of SSF technology group was 88.24％,the specificity was 98.61％,the positive predictive value was 96.77％,the negative predictive value was 94.67％,and the accuracy was 95.28％.Conclusion SSF can reduce the motion artifacts and stent artifacts of patients after coronary artery stenting,and it is better applied to the follow-up evaluation of patients after stenting.
万方数据
维普
