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在7T时对新生儿大脑进行T₁和T₂测量

Aiman Mahmoud¹, Raphael Tomi-Tricot^2,3, David Leitão¹

¹Imaging Physics and Engineering Research Department, School of Biomedical Engineering and Imaging Sciences, King's College London, London, UK.

Magnetic resonance in medicine

|December 14, 2024

概括

这项研究确定了新生儿大脑正常的T1和T2放松时间在7特斯拉,这对于优化MRI脉冲序列在婴儿神经成像中至关重要. 这些值与成人和低场新生儿数据有显著差异.

科学领域:

神经成像是一种神经成像.
磁共振成像 (MRI) 是一种磁共振成像技术.
新生儿医学新生儿医学

背景情况:

准确的MRI需要特定于组织的放松时间值.
新生儿大脑发育需要年龄特定的成像参数.
高场MRI (7特斯拉) 提供了增强的信号,但需要定制的协议.

研究的目的:

确定新生儿大脑7特斯拉时T1和T2NMR放松时间的预期范围.
为优化新生儿MRI提供特定年龄的放松值.

主要方法:

从40个婴儿 (33-52周的月经后年龄) 在自然睡眠中的检查中获得的数据.
在白质,皮质,小脑和深灰质中使用单片T1和T2映射协议.
采用自动图像细分用于感兴趣地区的定义.

主要成果:

预计40周月经后的T1放松时间:白质 (2933毫秒),小脑 (2653毫秒),基底腺 (2486毫秒).
经月经后40周估计的T2放松时间:白质 (119毫秒),小脑 (99毫秒),基底 (90毫秒).
观察到大多数放松时间和月经后年龄之间存在显著的负相关性,特别是在小脑中.

结论:

呈现了新生儿大脑T1和T2放松值在7特斯拉.
这些值与成人7T数据和低场新生儿数据有显著差异.
这些发现对于新生儿MRI研究中脉冲序列优化至关重要.

关键词:

新生儿成像学新生儿成像学放松时间放松时间.超高射场是指一个超高射场.

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