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在7T使用交叉23Na/H pTxMRI与运动和基于解剖学B的改善心肌量化

Laurent Ruck¹, Nico Egger¹, Benedikt Zobler²

¹Institute of Radiology, University Hospital Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, Germany.

Magnetic resonance in medicine

|March 17, 2026

概括

这项研究引入了一种新的方法,用于精确的心肌量化,使用心脏MRI在7特斯拉. 将运动校正与基于解剖学的B1偏差场校正相结合,可显著提高准确性和可重复性.

科学领域:

心血管磁共振成像 - 心血管磁共振成像
-23 核磁共振成像
定量成像技术定量成像技术

背景情况:

由于运动和B1场的不均性,心肌23Na在7T的量化具有挑战性.
准确的成像对于评估心肌健康和疾病至关重要.

研究的目的:

为了提高心肌23Na定量在心脏MRI中的准确性和可重复性,在7T.
实施一种新的基于解剖学的B1偏差场校正与运动校正相结合.

主要方法:

在7T使用了双核交联的23Na/1HMRI序列.
1H MR数据实现了自动细分和运动校正.
使用1H衍生细分开发了一种新的基于解剖学的B1偏差场校正.

主要成果:

联合运动和B1校正显著改善了心肌量化的重复性 (2.0 mM,4.0%).
基于解剖学的B1校正超越了基于幻象的方法.
测量的心肌度 (49.5 ± 4.7 mM) 与文献中的值一致.

结论:

回溯运动校正和基于解剖学的B1校正使得在7T时可重复的心肌的量化.
这种方法为未来的临床研究提供了一个可扩展的框架,使用1HMRI进行校正.

关键词:

心脏 (23Na) 核磁共振成像交错的双核核核磁共振成像呼吸和心脏运动纠正,呼吸和心脏运动纠正.发送和接收 (B1) 校正超高电场强度 (7 T)

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Magnetic Resonance Imaging

Magnetic Resonance Imaging

Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...