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辐射多回声bSSFP和IDEAL在k空间中的化学转移分离,用于高速3D超极化C代谢MRI

Zirun Wang¹, Martin Grashei², Johannes Fischer¹

¹Division of Medical Physics, Department of Radiology, Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany.

Magnetic resonance in medicine

|July 28, 2025

概括

这项研究引入了超极化 (HP) 碳-13 (¹³C) MRSI的新方法,改善了代谢成像的时空分辨率. 该技术可以更快,更详细地实时监测代谢过程.

科学领域:

医疗成像医学成像
代谢成像 - 代谢成像
磁共振光谱学成像成像磁共振光谱学成像

背景情况:

超极化 (HP) 碳-13 (C) MRSI提供实时的代谢洞察力,但受到时间和空间分辨率的限制.
现有的方法难以平衡在代谢成像中需要高时间和空间分辨率的需求.

研究的目的:

引入一种新的多回声平衡稳态自由前行 (ME-bSSFP) 方法,用于非卡特西安HP13C MRSI的3D辐射读数.
为了在HP¹³C MRSI.中实现高时空分辨率的灵活重建.

主要方法:

使用ME-bSSFP与回声不对称和最小平方估计 (IDEAL) 的代分解来分离C代谢物信号.
评估了使用热极化C丰富的幻体和用HP [1-¹³C]pyruvate.pyruvate在老鼠体内实验的方法.

主要成果:

成功获取和分离热极化和HP ¹³C代谢物信号.
证明了从单个测量中提取高时间或高空间分辨率3DMRI的能力.
在体内实现动态HP代谢物成像,时间分辨率为16ms,空间分辨率为5.56mm.

结论:

建议的辐射ME-bSSFP方法是HP¹³C MRSI的灵活,高效和强大的方法.
这种技术在监测代谢过程和生成动态的3D代谢物地图方面允许前所未有的时间分辨率.
该方法促进了动态建模,并为动态HP代谢MRI应用开辟了新的途径.

关键词:

这是IDEAL的理想.碳-13极极化过极化方法代谢性MRI是指代谢性的MRI.射线核磁共振 (MRI) 是一种放射性核磁共振.

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