多中心,多供应商验证1.5T和3T铁过载患者的肝脏定量敏感性映射
Collin J Buelo1,2, Julia Velikina2, Lu Mao3
1Department of Radiology, University of Wisconsin-Madison, Madison, Wisconsin, USA.
Magnetic resonance in medicine
|September 6, 2024
概括
定量敏感性映射 (QSM) 是一种可重复的MRI方法,用于评估不同中心和供应商的肝脏铁过载. 这种成像生物标志物显示出卓越的测试-重新测试可靠性和良好的场强度可复制性.
科学领域:
- 医疗成像医学成像
- 生物标志物 生物标志物
- 量化MRI是指数量化的MRI.
背景情况:
- 肝脏铁过载是一种需要准确量化的情况.
- 目前用于评估肝脏铁度的方法存在局限性.
- 定量敏感性映射 (QSM) 是一种新兴的MRI技术.
研究的目的:
- 评估肝脏QSM的可重复性和可重复性.
- 在1.5T和3TMRI扫描仪上评估QSM性能.
- 在多中心,多供应商环境中研究QSM,用于患有铁过载的患者.
主要方法:
- 未来的多中心研究与四个学术医疗中心和三个MRI供应商.
- 包括已知或疑似肝脏铁过载的受试者.
- 在1.5T和3T获得多回声破坏的梯度回忆回声扫描,并对子集进行重复性测试.
- 重建和分析易感性和R2地图,比较QSM与基于R2的肝脏铁度.
- 使用布兰德-阿尔特曼分析评估场强度可重复性和测试/重复测试可重复性.
主要成果:
- 在1.5T和3T分别分析了155/80和159/70数据集 (测试/重新测试).
- 在不同地点进行可复制的校准,观察到一些变化.
- 良好的场强度可重现性 (一致性相关系数=0.862).
- 优异的测试-重复测试可重复性 (类内相关系数=0.951).
结论:
- QSM是一种可行且可重复的成像生物标志物,用于跨中心和MRI供应商的肝脏铁过载.
- QSM可以补充基于R2的方法,因为它们可以从相同的获取中获得.
- 标准化QSM获取参数可以进一步提高其实用性.
- 质量测量仪表显示,对于对肝脏铁的定量评估有很大的前景.
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