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高灵敏度,低电场的F-MRI方法使用高酸铁度的酸铁

Yupeng Cao¹, Xiaohan Zhou^1,2, Xiaoli Liu³

¹National Center for Nanoscience and Technology, Beijing 100190, China.

Analytical chemistry

|July 4, 2023

概括

-19MRI (F-MRI) 现在可以在低场系统上使用新的k空间缩放成像 (KSSI) 序列. 这种硬件友好的方法提高了灵敏度和量化,用于更广泛的临床应用.

科学领域:

磁共振成像 (MRI) 是一种磁共振成像技术.
医学物理医学物理
生物医学工程生物医学工程

背景情况:

-19MRI (F-MRI) 提供无背景量化,对研究和临床应用有价值.
高场MRI系统限制F-MRI的可访问性;低场系统更为普遍.
通过减少F旋转放松时间 (T) 和超短回声时间 (UTE) 成像来提高检测灵敏度至关重要,但具有挑战性.

研究的目的:

开发一种硬件友好的超短回声时间 (UTE) ¹⁹F-MRI序列,与低场MRI系统兼容.
为了提高F-MRI在低磁场的检测灵敏度和量化能力.

主要方法:

介绍k空间缩放成像 (KSSI) MRI序列用于可变尺度k空间采样.
在实验的定制低场MRI系统上实施KSSI.
使用猪骨, perfluorooctyl 化物 (PFOB) 幻影和具有瘤的小鼠模型进行验证.

主要成果:

KSSI成功验证了对猪骨的超短TE成像.
在658mM度下实现了高信号噪声比 (SNR),显示出高灵敏度.
对于3.29M的PFOB幻影,KSSI显示了7.1倍高的SNR比旋转回声,并在各种度中展示了可量化的容量.
同时的H/F成像在一个带有瘤的小鼠上进行.

结论:

在低场系统上,KSSI序列能够实现硬件友好的,超短的TE19F-MRI.
KSSI显著提高了检测灵敏度和量化,克服了传统UTE序列的局限性.
这种方法在低场MRI设置中具有探针临床转换的巨大潜力.

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