Diagnostic value and related factors about computed tomography angiography after intracranial and extracranial stents placement

doi:10.3969/j.issn.1006-7795.2021.02.025

Abstract

Abstract: Objective To investigate the diagnostic accuracy and related affecting factors of computed tomography angiography (CTA) after intracranial and extracranial stents placement.Methods A total of 26 patients with intracranial and extracranial stent placement from December 2016 to November 2019 were retrospectively reviewed. There are 18 males and 8 females with the mean age (62.6±10.6) years and 37 stents were placed. All of them were followed up by CTA and digital subtraction angiography(DSA). CTA imaging quality inside stents was graded according to follow up DSA. The related factors including the diameter of the artery, the intracranial or extracranial, close to skull or not, presence or absence of the coil, were analyzed statistically. Results The imaging quality grade of in the stent was closely related to the diameter of the artery. According to the Youden index, the best cut-off value for the vessel diameter was 2.5 mm. There was significant difference between the intracranial and extracranial groups (P<0.001). There was no significant difference of imaging quality between the two groups, stay close to the skull or not(P=0.321). There was significant difference between the two groups about the coil existence (P<0.001). Conclusion After intracranial and extracranial stents placement, the accuracy of CTA follow-up is related to the diameter of the artery where the stent is located. When it is larger than 2.5 mm, it seems to have higher accuracy. The skull has no influence on image quality. The adjacent coils seriously attenuate the image quality.

Key words: stent, computed tomography angiography, digital subtraction angiography, artifact, follow up, diameter

CLC Number:

R445

Qi Yi, Zhang Weiguo, Jia Jianwen, Zhong Hongliang, Yang Hongchao, Liu He. Diagnostic value and related factors about computed tomography angiography after intracranial and extracranial stents placement[J]. Journal of Capital Medical University, 2021, 42(2): 312-316.

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URL: https://journal03.magtech.org.cn/Jweb_sdykdxxb/EN/10.3969/j.issn.1006-7795.2021.02.025

https://journal03.magtech.org.cn/Jweb_sdykdxxb/EN/Y2021/V42/I2/312

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