Detection of inflammation in abdominal aortic aneurysm with reduced field-of-view and low-b-value diffusion-weighted imaging.

Autor: Pan YJ; Department of Radiology, Zhongshan Hospital, Fudan University, No.180 Fenglin Road, Xuhui District, Shanghai 200032, China; Shanghai Institute of Medical Imaging, No.180 Fenglin Road, Xuhui District, Shanghai 200032, China., Jiang XL; Department of Vascular Surgery, Zhongshan Hospital, Fudan University, No.180 Fenglin Road, Xuhui District, Shanghai 200032, China., Shan Y; Department of Radiology, Zhongshan Hospital, Fudan University, No.180 Fenglin Road, Xuhui District, Shanghai 200032, China; Shanghai Institute of Medical Imaging, No.180 Fenglin Road, Xuhui District, Shanghai 200032, China., Xu PJ; Department of Radiology, Zhongshan Hospital, Fudan University, No.180 Fenglin Road, Xuhui District, Shanghai 200032, China; Shanghai Institute of Medical Imaging, No.180 Fenglin Road, Xuhui District, Shanghai 200032, China., Dong ZH; Department of Vascular Surgery, Zhongshan Hospital, Fudan University, No.180 Fenglin Road, Xuhui District, Shanghai 200032, China., Lin J; Department of Radiology, Zhongshan Hospital, Fudan University, No.180 Fenglin Road, Xuhui District, Shanghai 200032, China; Shanghai Institute of Medical Imaging, No.180 Fenglin Road, Xuhui District, Shanghai 200032, China. Electronic address: lin.jiang@zs-hospital.sh.cn.
Jazyk: angličtina
Zdroj: Magnetic resonance imaging [Magn Reson Imaging] 2024 Dec 06; Vol. 117, pp. 110295. Date of Electronic Publication: 2024 Dec 06.
DOI: 10.1016/j.mri.2024.110295
Abstrakt: Objectives: To evaluate the performance of diffusion-weighted imaging (DWI) with an optimal b-value and field-of-view in identifying wall inflammation in abdominal aortic aneurysm (AAA) by comparing it to delayed enhancement T1-weighted imaging (DEI).
Methods: Twenty-five males with AAA were prospectively enrolled and underwent fat-suppressed T1-weighted dark-blood imaging (T1WI), full field-of-view (f-FOV) and reduced field-of-view (r-FOV) DWI (b values = 0, 100, 400 and 800 s/mm 2 ), and DEI. Corresponding images on f-FOV, r-FOV DWI and DEI at the same level were evaluated qualitatively and quantitatively using the paired t-test and Wilcoxon signed-rank test. The agreement in detecting wall inflammation between DWI and DEI sequences was analyzed using weighted kappa statistics.
Results: For both r-FOV and f-FOV DWI, the scores of delineation of aneurysm wall and lesion conspicuity, signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) were highest on DWI₁₀₀ (Ps < 0.05). The scores of delineation of aneurysm wall, geometric distortion, lesion conspicuity, and SNR, CNR were significantly higher on r-FOV DWI than those on f-FOV DWI (Ps < 0.05). r-FOV DWI₁₀₀ showed comparable performance to DEI in detecting wall inflammation (κ = 0.715), with superior blood suppression and higher SNR and CNR (Ps < 0.05).
Conclusions: DWI with r-FOV and low b-value could be a promising alternative to DEI in identifying wall inflammation in AAA.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024. Published by Elsevier Inc.)
Databáze: MEDLINE
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