Application value of single energy metal artifact reduction in the follow-up CT angiography after endovascular repair of abdominal aortic aneurysm combined with coil embolization
10.12025/j.issn.1008-6358.2024.20240920
- VernacularTitle:单能量去金属伪影技术在腹主动脉瘤腔内修复术联合弹簧圈栓塞术后CTA复查中的应用价值
- Author:
Ying ZHANG
1
,
2
;
Chun ZHOU
1
,
2
;
Cheng LIU
1
,
2
;
Kai HOU
1
,
2
Author Information
1. Department of Radiology, Zhongshan Hospital, Fudan University, Shanghai 200032, China
2. Shanghai Institute of Medical Imaging, Shanghai 200032, China.
- Publication Type:Techniqueandmethod
- Keywords:
abdominal aortic aneurysm;
internal iliac artery aneurysm;
single energy metal artifact reduction technology;
CT angiography;
endovascular repair of abdominal aortic aneurysm
- From:
Chinese Journal of Clinical Medicine
2024;31(6):984-989
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the application value of single energy metal artifact reduction technology (SEMAR) in the CTA follow-up of complex abdominal aortic aneurysm endovascular repair (EVAR) combined with coil embolization using 320-slice CT spiral scanning mode. Methods A retrospective analysis was conducted on the images of 14 patients with abdominal aortic aneurysm and 2 patients with internal iliac artery aneurysm who underwent abdominal CTA reexamination 30 days after EVAR combined with coil embolization at Zhongshan Hospital, Fudan University from August 2023 to February 2024. The original data were reconstructed using a hybrid iterative reconstruction algorithm (non-SEMAR group) and a combined reconstruction and SEMAR algorithm (SEMAR group), and the artifact index (AI), contrast-to-noise ratio (CNR), and subjective scores between the two groups were compared. Results The AI values of up, down, left, right around the spring coil and adjacent aortic cavity in the SEMAR group were lower than those in the non-SEMAR group (38.16±19.20 vs 89.29±30.93, 30.75±16.28 vs 82.62±28.01, 33.61±16.18 vs 74.90±26.28, 44.99±15.91 vs 87.72±33.70, and 24.49±12.58 vs 47.29±13.55; P＜0.001), and the CNRs in the SEMAR group were higher than those in the non-SEMAR group (2.47±2.15 vs 1.01±0.74, 2.32±2.01 vs 0.72±0.50, 4.93±4.15 vs 1.38±0.79, 4.10±4.14 vs 1.56±1.18, and 19.91±11.01 vs 11.01±7.77; P＜0.05). Compared with the non-SEMAR group, the subjective scores of image in the SEMAR group were higher (P＜0.001). Conclusions SEMAR technology can significantly reduce the artifact of spring coil, improve the clarity of tumors, visceral arteries, stents, and internal leaks images, and has important clinical significance for follow-up after EVAR surgery.
