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灵活的阵列线圈用于3.0特斯拉的宫和脊外 (FACE) MRI
Frederik Abel1, Ek T Tan1, Martijn Lunenburg2
1Hospital for Special Surgery, 535 East 70th Street, NY 10021, United States of America.
Physics in medicine and biology
|October 10, 2023
概括
一个新的灵活的MRI线圈阵列显著改善了宫脊椎成像的信号噪声比. 这种合规设计提高了图像质量,并允许MRI扫描中的加速度因子更高.
科学领域:
- 磁共振成像 (MRI) 是一种磁共振成像技术.
- 医疗设备工程 医疗设备工程
- 放射学 放射学是一门学科.
背景情况:
- 高分辨率的宫脊柱 (c-脊柱) 和外脊椎部MRI需要紧密适合患者的接收器线圈,以获得最佳的信号噪声比 (SNR).
- 传统的刚性c-脊柱线圈不符合个体部解剖学,导致SNR减少.
- 灵活,可调整的线圈阵列为3DMRI提供了改进SNR和更高的加速度因子的潜力.
研究的目的:
- 设计,实施和评估一种新的,符合规范的23通道灵活的仅接收阵列,用于3特斯拉 (T) 的宫和脊外 (FACE) MRI.
- 与传统的头部单元 (HNU) 线圈相比,评估FACE阵列在SNR和并行成像能力方面的性能.
- 评估FACE阵列对高分辨率c脊椎和部MRI,包括MR神经学 (MRN) 的临床实用性.
主要方法:
- 一个具有高阻抗元件的23通道合规,灵活的仅接收阵列 (FACE) 为3TMRI设计.
- 使用测量SNR和几何因子 (g-因子) 的幻象研究对传统的21通道HNU线圈进行了评估.
- 在体内成像在健康志愿者和使用高分辨率c脊椎和部MRI协议的患者进行了3T.
主要成果:
- 与HNU相比,FACE阵列在异位中心位置的平均SNR (141%-161%) 和幻影研究中的异位中心位置的平均SNR显著更高,比HNU高4%.
- 并行成像性能在R = 2x2时显示了可比的结果,但在R = 3x3时改善了g因子 (1.46-2.15) 与FACE阵列对比HNU (2.36-3.62).
- 在体内初步测试证实了使用FACE阵列进行部骨和软组织评估的同等或更高的图像质量.
结论:
- 具有高阻抗元件的合规,高度灵活的宫MRI阵列可以显著提高SNR.
- 这种新的线圈设计提高了并行成像性能,使宫成像的加速度因子更高.
- 面部阵列有可能实现更高分辨率的宫MRI,改善诊断能力.
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