跨多个供应商的联合T1-T2过渡状态放松计的重复性和可重复性以及在幻影和人类大脑中的3T的实现
Marta Lancione1, Matteo Cencini1, Domenico Aquino2
1IRCCS Fondazione Stella Maris, Pisa, Italy.
NeuroImage
|September 18, 2025
概括
过渡状态放松计 (TSR) 提供快速的T1和T2MRI放松时间. 虽然在幻影中准确,但体内扫描显示出各供应商的变化,因此需要仔细考虑多中心研究.
科学领域:
- 磁共振成像 (MRI) 是一种磁共振成像技术.
- 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:
- 过渡状态放松计 (TSR) 允许快速地绘制T1和T2放松时间.
- 在MRI供应商之间进行标准化对于多中心采用至关重要.
- 评估TSR的供应商间一致性对于可靠的研究至关重要.
研究的目的:
- 评估基于TSR的T1和T2映射在3T的准确性,可重复性和供应商间可重复性.
- 在不同MRI系统中量化TSR实现的变化.
- 在多中心TSR研究中确定潜在的偏差来源.
主要方法:
- 一个旅行大脑研究,使用一个幻影和五名志愿者在三家制造商的四个3T MRI系统中进行.
- 布兰德-阿尔特曼分析和变化系数 (CV) 对于幻影的准确性,可重复性和可重复性.
- ANOVA,声向CVs和一般线性模型 (GLM) 用于体内现场间的变异性和偏差评估.
主要成果:
- 在幻影扫描中观察到卓越的准确性,重复性和可重复性.
- 活体内扫描显示出出色的重复性 (CV <4.5%) 和通常良好的跨站点/跨供应商可重复性.
- 在TSR实现中发现了显著的变异性,在脑组织中,T1的~100ms和T2的~2ms的位置相关偏差.
结论:
- 在幻影研究中,TSR显示出高准确性和可重复性.
- 活体中TSR表现出良好的重复性,但显著的供应商间和站点间的变化.
- 在TSR实现的差异,可能是由于磁化转移和B1+校准,引入偏差,必须管理多中心研究.
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