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快速的人类心脏MRSI (P-MRSI) 的可重复性,使用7 T的同心环轨迹读数

Ferenc E Mózes¹, William T Clarke², Andrew Tyler³

¹Oxford Centre for Clinical Magnetic Resonance Research, Radcliffe Department of Medicine, Division of Cardiovascular Medicine, University of Oxford, Oxford, UK.

Magnetic resonance in medicine

|December 8, 2025

概括

同心环轨迹磁共振光谱成像 (CRT-MRSI) 为心脏PCr/ATP比率测量提供了更快的获取速度. 这项研究证实了CRT-MRSI.

科学领域:

心血管磁共振成像 - 心血管磁共振成像
代谢成像 - 代谢成像
磁共振光谱法磁共振光谱法

背景情况:

脂蛋白与ATP (PCr/ATP) 的比例是一个关键的代谢标志物.
基于7特斯拉的标准里叶变换的MRSI (FT-MRSI) 对于临床使用是耗时的.
对于心脏代谢研究,需要加速成像技术.

研究的目的:

评估三个同心环轨迹MRSI (CRT-MRSI) 协议的可重复性.
将CRT-MRSI的基于voxel的PCr/ATP比率与使用线性代数模型 (SLAM) 来进行光谱学的基于隔间的值进行比较.
评估CRT-MRSI作为对FT-MRSI进行心脏能量评估的更快的替代方案.

主要方法:

七名健康的志愿者在不同的日子里进行了多次扫描.
采集了3DFT-MRSI数据,随后采用了三个CRT-MRSI协议,分辨率和持续时间各不相同.
使用OXSA工具箱进行会话间和会话内可重复性分析的量化PCr/ATP比率.

主要成果:

在被试者内对联重复测量时没有显著差异.
在FT-MRSI和所有CRT-MRSI协议之间达成良好协议.
与FT-MRSI相比,CRT-MRSI协议的重复率 (CoR) 较大,但CRT-SLAM的重复率较低,尤其是在高分辨率下.

结论:

对于PCr/ATP量化,CRT-MRSI协议是可以重复的.
与基于voxel的方法相比,CRT-SLAM提供了更好的信号噪声比 (SNR) 和较低的COR.
这些发现支持在临床环境中更短的31P MRS获取时间和先进的能量技术.

关键词:

31P光谱法是指光谱法中的 31P.加速的k-空间穿越.同心环的轨迹是同心环的轨迹.心肌动脉的能量学

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