扩散MRI头部运动校正方法的准确性很高,但受到无声化和采样方案的影响
Matthew Cieslak1,2, Philip A Cook3,4, Golia Shafiei1,2
1Lifespan Informatics and Neuroimaging Center, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, United States.
Human brain mapping
|February 10, 2024
概括
在扩散权重MRI (dMRI) 中进行头部运动校正具有挑战性. 埃迪和SHORELine方法都表现良好,埃迪受益于MP-PCA无效化.
科学领域:
- 医疗成像医学成像
- 神经成像是一种神经成像.
- 扩散式核磁共振成像 (MRI)
背景情况:
- 由于对比度变化,头部运动显著影响扩散权重MRI (dMRI) 数据质量.
- 精确的头部运动校正对于可靠的dMRI分析至关重要.
- 像FSL的Eddy这样的现有方法被广泛使用,但也有局限性.
研究的目的:
- 综合评估和比较埃迪和dMRI头部运动校正的新型SHORELine方法的性能.
- 评估采样方案,运动范围和否定策略对校正准确性的影响.
- 为未来的研究提供可重现的工作流程和模拟数据.
主要方法:
- 模拟真实的头部运动,使用软件光纤幻影与已知的地面真实运动.
- 评估了FSL的Eddy (高斯过程模型) 和基于3dSHORE的SHORELine方法.
- 评估了预校正拒绝策略,特别是MP-PCA对Eddy业绩的影响.
主要成果:
- 埃迪和SHORELine在各种模拟场景中都表现出强的表现.
- 校正性能受到数据采样方案和头部运动的大小的影响.
- 使用MP-PCA预消音dMRI数据显著提高了埃迪的头部运动校正准确度.
- 在非外的扩散光谱成像数据中,SHORELine证明了对运动校正的有效性.
结论:
- 埃迪和SHORELine是dMRI头部运动校正的强大方法.
- 拒绝MP-PCA是一种有益的预处理步骤,可以提高Eddy的性能.
- 短线为运动校正提供了一个可行的替代方案,特别是在非外的dMRI采集中.
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