在头骨密度MRI中患者散体运动的效果和纠正
Caroline A Doctor1, Leonardo A Rivera-Rivera1,2,3, Laura B Eisenmenger3
1Department of Medical Physics, University of Wisconsin, Madison, Wisconsin, USA.
Magnetic resonance in medicine
|February 2, 2026
概括
运动校正显著提高了使用DENSE成像进行心脏驱动的大脑组织脉动测量的准确性和可重复性. 这种技术减轻了运动工件,提高了各种患者群体的数据可靠性.
科学领域:
- 生物医学成像技术 生物医学成像技术
- 神经成像是一种神经成像.
- 心血管成像 - 心血管成像
背景情况:
- 密集成像测量心脏驱动的大脑组织脉,但对患者的大量运动敏感.
- 在DENSE中进行亚毫米位移编码需要高精度,由于运动敏感性,限制了其在儿科和老年人群中的应用.
研究的目的:
- 为了评估诱导散体运动对DENSE扫描的影响.
- 评估DENSE成像现有和新型运动校正方法的有效性.
主要方法:
- 十名参与者在3.0T系统上进行了2D DENSE扫描的测试和反复测试,并没有在3.0T系统上诱导运动.
- 使用带有和没有运动校正 (多项式适合外脑组织) 的管道计算大脑位移场.
- 沃克塞尔智能比较评估了扫描可重复性和纠正和未纠正扫描之间的位移偏差.
主要成果:
- 诱导运动显著影响了DENSE移位测量,导致强度变化,阶段包裹工件和高峰到高峰移位的增加.
- 运动校正成功删除了文物,并减少了扫描之间的差异 (R^2从0.45增加到0.96).
- 随着运动校正,测试-重试可重复性得到了显著改善 (ρ 随着运动从 0.46 增加到 0.98,而没有运动则从 0.76 增加到 0.98).
结论:
- 运动校正显著改善了在诱导运动期间获得的DENSE测量的对应性.
- 实现的运动校正提高了测试-重新测试的可重复性,即使没有诱导运动.
- 这些发现支持DENSE成像的更广泛的临床应用,通过解决与运动相关的限制.
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