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3D MR指纹用于动态对比增强成像整个小鼠大脑的3D MR指纹

Yuran Zhu¹, Guanhua Wang², Yuning Gu¹

¹Department of Biomedical Engineering, Case Western Reserve University, Cleveland, Ohio, USA.

Magnetic resonance in medicine

|August 20, 2024

概括

我们开发了一种快速的3DMR指纹 (MRF) 方法,用于在小鼠大脑中动态,定量跟踪对比剂运输. 这种技术提供了同时T1和T2映射,具有高分辨率和可重复性.

科学领域:

神经成像是一种神经成像.
量化MRI是指数量化的MRI.
生物医学工程生物医学工程

背景情况:

传统的MRI方法用于对比剂量化,对于在小鼠大脑中的动态研究来说太慢了.
精确跟踪对比剂运输对于理解大脑功能和疾病至关重要.

研究的目的:

开发和验证一种快速的3DMR指纹 (MRF) 方法,用于同时在整个小鼠大脑中绘制T1和T2图像.
为了能够以高时间分辨率在体内动态跟踪对比剂的运输.

主要方法:

为9.4T临床前MRI扫描仪设计了一个具有可变采集段长度和磁化准备的3DMRF序列.
使用基于模型的重建来提高MRF的准确性和速度.
在T1和T2测量的体外和体外验证,随后在小鼠中进行动态对比增强的MRF扫描.

主要成果:

3D MRF方法在体外实现了精确的T1和T2测量,并在体内进行可重复的测量.
动态对比增强MRF扫描提供了全脑T1和T2映射,时间分辨率为4.3分钟,空间分辨率高.
该方法允许对比剂 (Gd-DTPA) 度和在小鼠大脑区域的传输动力学进行定量分析.

结论:

本研究提出了第一个动态的多参数方法,用于用3DMRF在小鼠大脑中进行定量对比剂传输跟踪.
开发的3DMRF技术为小动物模型中的体内药理学研究提供了重大进展.

关键词:

在3D中,它是3D.在CSF的CSF中,在MR指纹采集.T1 T1 T1 T1 T1 T1 T1 T1 T1 T1 T1 T1 T1 T1 T1 T1 T1 T1 T2 T2 这里是T2.动态对比增强 - 增强了动态对比.

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