Magnetic Resonance Imaging of the Peripheral Nerves and Fascicles of the Knee Using Double Echo Steady State Sequence at 7 Tesla.

IF 5.3 2区医学 Q1 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING

Korean Journal of Radiology Pub Date : 2025-06-01 DOI:10.3348/kjr.2024.0912

Pinzhen Chen, Zhiming Zhen, Jing Li, Taotao Yang, Wenjing Hou, Meng Zeng, Mingshan Du, Suyi Zhou, Wei Chen, Yicheng Hsu, Bo Wang, Zhi Liu, Yi Wu, Jiafei Chen, Wei Chen

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引用次数: 0

Abstract

Objective: To evaluate the applicability of the double echo steady state (DESS) sequence at 7 tesla (7T) for high-resolution imaging of the peripheral nerves and fascicles of the knee.

Materials and methods: We prospectively included 32 healthy participants (mean age 39 ± 14 years, 20 females). The patients underwent 7T magnetic resonance imaging (MRI) of the knee using proton density turbo spin-echo fat suppression (PD-TSE FS), three-dimensional DESS (3D-DESS), and higher in-plane resolution DESS (DESS_HR) sequences. The signal-to-noise ratios (SNRs) of the peroneal nerve (PN) and tibial nerve (TN) and contrast-to-noise ratios (CNRs) between the nerves and adjacent fat, vessels, and muscles were quantitatively measured by two readers and averaged. Five radiologists qualitatively assessed the overall image quality, pulsatile flow artifacts, and visualization of the PN and its branches, the TN, and the saphenous nerve (SN) using a five-point Likert-type scale, with the results averaged. The results of the three image sequences were compared.

Results: The SNR for the TNs in the DESS_HR sequence were lower than those in the PD-TSE FS (P < 0.001) and 3D-DESS (P = 0.024) sequences, whereas the SNR for the PNs did not differ significantly across the three sequences. The DESS_HR sequence exhibited superior TN- or PN-to-fat and PN-to-muscle CNR values when compared with the PD-TSE FS and 3D-DESS sequences (P ≤ 0.016). The TN- and PN-to-vessel CNR values in the DESS_HR and PD-TSE FS sequences were higher than those in the 3D-DESS sequence (P ≤ 0.001). Qualitative assessments revealed fewer pulsatile artifacts in 3D-DESS than in DESS_HR and PD-TSE FS (P < 0.001), with DESS_HR exhibiting fewer artifacts than PD-TSE FS (P = 0.035). DESS_HR excelled in visualizing the common PN, TN, and SN when compared with other sequences (P < 0.001), whereas 3D-DESS provided superior visualization of PN branches when compared with other sequences (P ≤ 0.042).

Conclusion: The DESS sequence at 7T MRI enhances visualization of peripheral nerves and fascicular structures around the knee.

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7特斯拉双回波稳态序列对膝关节周围神经和神经束的磁共振成像。

目的：探讨7特斯拉（7T）双回声稳态序列（DESS）对膝关节周围神经及神经束高分辨率成像的适用性。材料与方法：前瞻性纳入32例健康受试者（平均年龄39±14岁，女性20例）。患者采用质子密度涡轮自旋回波脂肪抑制（PD-TSE FS）、三维DESS （3D-DESS）和更高面内分辨率DESS （DESSHR）序列对膝关节进行7T磁共振成像（MRI）。用2台读卡器定量测量腓神经（PN）和胫神经（TN）的信噪比（SNRs）以及神经与邻近脂肪、血管和肌肉的噪声比（CNRs），取平均值。五名放射科医生使用李克特五分制量表定性地评估了整体图像质量、脉动流伪影以及PN及其分支、TN和隐神经（SN）的可视化，结果取平均值。比较了三种图像序列的检测结果。结果：DESSHR序列中TNs的信噪比低于PD-TSE FS序列（P < 0.001）和3D-DESS序列（P = 0.024），而PNs的信噪比在三个序列之间无显著差异。与PD-TSE FS和3D-DESS序列相比，DESSHR序列TN-或PN-to-fat和PN-to-muscle的CNR值更高（P≤0.016）。DESSHR和PD-TSE FS序列的TN-和PN-to-vessel CNR值高于3D-DESS序列（P≤0.001）。定性评估显示3D-DESS比DESSHR和PD-TSE FS更少的脉搏伪影（P < 0.001）， DESSHR比PD-TSE FS更少的伪影（P = 0.035）。与其他序列相比，DESSHR在常见PN、TN和SN的显示上优于其他序列（P < 0.001），而3D-DESS在PN分支的显示上优于其他序列（P≤0.042）。结论：7T MRI DESS序列增强了膝关节周围神经和束状结构的可视化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Korean Journal of Radiology 医学-核医学

CiteScore

10.60

自引率

12.50%

发文量

141

审稿时长

1.3 months

期刊介绍： The inaugural issue of the Korean J Radiol came out in March 2000. Our journal aims to produce and propagate knowledge on radiologic imaging and related sciences. A unique feature of the articles published in the Journal will be their reflection of global trends in radiology combined with an East-Asian perspective. Geographic differences in disease prevalence will be reflected in the contents of papers, and this will serve to enrich our body of knowledge. World''s outstanding radiologists from many countries are serving as editorial board of our journal.