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Alejandro Monreal-Madrigal¹, Denizhan Kurban², Desmond H Y Tse³

¹Maastricht Brain Imaging Centre, Faculty of Psychology and Neuroscience, Maastricht University, Maastricht, The Netherlands. alejandromonreal93@outlook.com.

Magma (New York, N.Y.)

|September 29, 2025

概括

分段螺旋出读数显示出超高波段 (UHF) 功能性MRI (fMRI) 在亚毫米分辨率的前景. 这种方法通过使用更短的回声时间来优化血液氧气水平依赖 (BOLD) 信号,改善时间信号与噪声比.

科学领域:

神经成像是一种神经成像.
磁共振成像技术磁共振成像技术

背景情况:

超高场 (UHF) 磁共振成像 (MRI) 为功能性MRI (fMRI) 提供了增强的灵敏度.
在UHF中使用BOLD fMRI实现亚毫米分辨率存在技术挑战.

研究的目的:

为了评估9.4T的亚毫米粗体fMRI的螺旋读数.
用功能实验验证 BOLD 点差函数 (PSF) 的模拟.

主要方法:

模拟和功能实验评估了螺旋外和螺旋内读出性能.
研究了相对于T₂*的回声时间 (TE) 对BOLD信号的影响.

主要成果:

螺旋出读数与TE2*保持了BOLD灵敏度.
较短的TE减少了重复时间 (TR),增强了时间信号对噪声比率 (tSNR),并最大限度地减少了非共振效应.

结论:

螺旋式读数适用于更低分辨率的超高频fMRI.
分段螺旋外读取显示在UHF (>7T) 中具有显著的 mesoscopic BOLD fMRI 潜力.

关键词:

大胆的fMRI.非卡特西安读数的读数这是开源的,开源的.Pulseq 的意思是脉冲.超高射场是指一个超高射场.

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Magnetic Resonance Imaging

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