Comparative study of the value of color Doppler ultrasonography and multi-slice CT angiography in the stent-assisted angioplasty of carotid artery stenosis

Objective:To evaluate the value of multi-slice CT angiography(MSCTA) and ultrasonography color Doppler flow imaging(CDFI) in the stent-assisted angioplasty of carotid artery stenosis(CAS).Methods:The imaging data of MSCTA and CDFI before and after stent-assisted angioplasty of CAS in 36 patients were analyzed retrospectively.Digital subtracted angiography(DSA) was used as the golden standard.The accuracy of evaluating the degree of CAS and the density of arterio-sclerotic plaque by CDFI and MSCTA as well as the value of these two techniques in stent-assisted angioplasty of CAS were compared.Results:The sensitivity of CDFI and MSCTA in the diagnosis of CAS was 90.9% and 92.8% respectively,the specificity was 95.6% and 95.7% respectively,the accuracy was 92.4% and 93.8% respectively,negative predictive value was 82.7% and 86.5% respectively,positive predictive value was 97.8% and 97.8% respectively.The coincidence rate of analyzing carotid atherosclerosis plaque by CDFI and MSCTA was 86.9%.Conclusion:For the stent-assisted angioplasty of CAS,CDFI could be used for screening of carotid artery lesion,evaluation of treatment effect and follow up.MSCTA is superior in displaying high position bifurcation,intra-cranial segment of internal carotid artery and the variation of carotid artery pathway.The accuracy of diagnosis could be improved with CDFI in combination with MSCTA.