| ORIGINAL ARTICLE |
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| Year : 2022 | Volume
: 70
| Issue : 2 | Page : 694--698 |
Clinical Study of High-Resolution C-Arm CT in Mechanical Recanalization and Stent Implantation for Chronic Cerebral Artery Occlusion
Teng-Fei Li, Cheng-Cheng Shi, Ji Ma, Pei-Ji Fu, Ming Zhu, Jian-Zhuang Ren, Xin-Wei Han
Department of Interventional Radiology, First Affiliated Hospital of Zhengzhou University; Interventional Institute of Zhengzhou University, Zhengzhou, China
Correspondence Address:
Dr. Jian-Zhuang Ren
No. 1 Jianshe East Road, Zhengzhou City
China
Dr. Xin-Wei Han
No. 1 Jianshe East Road, Zhengzhou City
China
 Source of Support: None, Conflict of Interest: None  | Check |
DOI: 10.4103/0028-3886.344607
Background: In recent years, among patients with chronic cerebral artery occlusion, recanalization can be achieved by an endovascular operation. However, complications and restenosis rates remain high.
Objective: To evaluate the utility of high-resolution C-arm CT (Dyna micro-CT) for stent placement in patients with chronic cerebral artery occlusion.
Methods and Materials: We retrospectively reviewed the clinical data of 27 patients with chronic cerebral artery occlusion who underwent mechanical recanalization and stent implantation. Images were reconstructed using conventional C-arm CT (Dyna CT) and Dyna micro-CT. Whether the stent was fully expanded and image quality was evaluated. Follow-up assessments included clinical and angiographic outcomes and complications.
Results: Twenty-two patients successfully underwent stenting (22 stents; 14 cases: Neuroform EZ; eight cases: Enterprise); stenting failed in five patients. Compared to Dyna CT, Dyna micro-CT afforded improved visualization of the stent structure, providing significantly improved image quality (P < 0.05). In seven patients, the stent under-expanded and dilatation was performed; thereafter, stent malapposition improved. One patient experienced sudden headache 22 hours after the procedure; CT showed intraparenchymal hemorrhage. The remaining 21 patients did not have acute thrombosis or bleeding complications and were followed up by imaging for 3-6 months. In three patients, digital subtraction angiography showed mild in-stent stenosis.
Conclusions: High-resolution C-arm CT can improve visualization of stent structures in chronic cerebral artery occlusion, making it easy to determine the extent of stent deployment and potentially reduce complications and stent restenosis.
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