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4D流动MRI速度不确定性量化量化

Sean M Rothenberger¹, Jiacheng Zhang², Michael Markl³

¹Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana, USA.

Magnetic resonance in medicine

|September 13, 2024

概括

一种新方法用速度距离 (VD) 度量化了4D流MRI速度测量的不确定性. 这提高了用于临床比较的4D流MRI数据的可靠性.

科学领域:

医疗成像医学成像
心血管成像 - 心血管成像
生物医学工程生物医学工程

背景情况:

4D流MRI提供了宝贵的血液动力学信息.
量化速度测量不确定性对于可靠的解释至关重要.
现有的方法缺乏全面的不确定性评估.

研究的目的:

开发一种自动方法,用于在4D流MRI中对voxel的不确定性进行估计.
引入速度距离 (VD) 度量作为4D流MRI速度质量的度量.

主要方法:

为了局部速度误差差值,利用质量保存.
使用标准化平均差异 (SDM) 进行速度误差相关.
以Mahalanobis距离评估VD;通过合成和体外验证.

主要成果:

这种方法对别名,噪音,分辨率和相封装敏感.
准确评估速度错误相关性 (<3.2%).
在体内表现出与对比度和缩性流量增加的速度质量.

结论:

该方法量化了来自噪声,相散和别名的速度误差.
能够在不同研究和系统中严格比较4D流MRI数据集.

关键词:

血液动力学血液动力学磁共振测速仪 (MRV) 是一种磁共振测速仪.阶段对比磁共振成像 (PC-MRI) 的使用.

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Magnetic Resonance Imaging

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