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使用PINS脉冲来和fMRI数据的输入效应在3和7T

Shota Hodono^1,2, Chia-Yin Wu^2,3, Jin Jin⁴

¹Donders Centre for Cognitive Neuroimaging, Radboud University, Nijmegen, Netherlands.

Magnetic resonance in medicine

|May 20, 2025

概括

独立于切片数量的功率 (PINS) 脉冲有效地和切片间隙中的磁化,减少功能性MRI (fMRI) 中的输入效应. 这种技术通过将血液流动的信号工件最小化来提高fMRI数据质量.

科学领域:

磁共振成像技术磁共振成像技术
功能磁共振成像 (fMRI) 是一种功能性磁共振成像技术.
生物医学工程生物医学工程

背景情况:

由血液磁化进入成像片所引起的输入效应可以污染fMRI信号.
现有的减轻流入效应的方法往往涉及复杂的收购方案或效率较低.

研究的目的:

开发和验证一种新的方法,即独立于切片数 (PINS) 脉冲的功率,用于抑制磁化流入效应.
评估PINS脉冲在不同磁场强度 (3T和7T) 的fMRI数据中减少输入器件的有效性.

主要方法:

设计并实施PINS脉冲,在每个激发前在切片间隙中和磁化.
通过模拟和幻影实验验证实和激发概况.
评估了使用流量幻影的入流抑制,并在3T和7T进行了体内fMRI实验.

主要成果:

在切片间隙中,PINS 脉冲有效地和磁化,而不会降低成像切片配置.
与无间隙收购相比,PINS显示了通过平面流入的优越抑制.
fMRI实验显示PINS在3T时减少了约25%的激活voxel,在7T时减少了约10%,这表明旋回回声BOLD信号的调制.

结论:

在fMRI中,PINS脉冲提供了一种有效和高效的方法来和入流效应.
PINS和模块提供了一个有价值的工具,用于调查fMRI数据分析中流入效应的贡献.

关键词:

在SE-BOLD中使用.血管外的 BOLD 流入效应影响到流入效应.血管内输入 BOLD 独立于切片数量的功率 (PINS) 脉冲.

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