Objective: The objective of this study was to assess the lumen visibility of carotid artery stents using multi–detector-row computed tomography (MDCT) angiography; compare medium-smooth, medium-sharp, and sharp kernels; and correlate these results to those of digital subtraction angiography (DSA).
Methods: We retrospectively evaluated 52 stents from 51 patients who underwent 16- and 64-slice MDCT angiography. Lumen diameters were measured 3 times by 2 neuroradiologists, and artificial luminal narrowing was calculated. To assess detection of in-stent restenosis (>50%), 2 neuroradiologists evaluated all MDCT and DSA images.
Results: Excellent intraobserver and interobserver agreements were obtained for the lumen diameter measurements (P < 0.001). Lumen diameter visibility improved, and artificial luminal narrowing decreased from the medium-smooth kernel to the sharp kernel. Visual estimation of all CT angiography using the 3 kernels showed high accuracy for detection of in-stent restenosis (>50%), compared with DSA.
Conclusions: Computed tomography angiography using a sharp kernel allows for more accurate assessment of lumen visibility after carotid artery stenting.
From the *Department of Radiology, Bucheon St Mary’s Hospital, and †Seoul St Mary’s Hospital, College of Medicine, The Catholic University of Korea, Republic of Korea, Seoul, South Korea.
Received for publication October 20, 2012; accepted January 24, 2013.
Reprints: Won Jong Yoo, MD, Department of Radiology, Bucheon St Mary’s Hospital, College of Medicine, The Catholic University of Korea, 2 Sosa-dong, Wonmi-gu, Bucheon, Gyeonggi, 420-717, Republic of Korea (e-mail: firstname.lastname@example.org).
The authors have no conflict of interest to declare.