在扫描仪软件升级期间,3D MR指纹的可重复性
Andrew Dupuis1, Yong Chen2, Kelvin Chow3
1Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, USA. andrew.dupuis@case.edu.
Magma (New York, N.Y.)
|November 5, 2024
概括
磁共振指纹 (MRF) 在扫描仪软件升级后保持一致的T1和T2值. 这确保了纵向研究的可靠性,强调了供应商合作和系统评估的重要性.
科学领域:
- 医疗成像医学成像
- 量化MRI是指数量化的MRI.
背景情况:
- 磁共振指纹 (MRF) 是一种定量MRI技术.
- 扫描器软件升级可能会改变硬件规格和重建参数,可能会影响MRF衍生的定量值.
- 确保跨软件版本的MRF数据的一致性对于其临床应用和纵向研究至关重要.
研究的目的:
- 在扫描仪软件升级后,量化3D MRF研究协议的可重复性.
- 评估供应商提供的软件更新对MRF衍生的T1和T2值的影响.
- 建立3D MRF的可靠性,以在不同环境中获得一致的数据.
主要方法:
- 在软件升级 (VA31A到VA50A) 之前和之后,八名健康志愿者在3T扫描仪上接受了3D MRF成像.
- 在线MRF重建涉及单值分解 (SVD) 和B1+校正.
- 评估了测试重复测试的可重复性,并使用哈佛-牛津皮下结构图谱的T1和T2值比较升级前和后的数据.
主要成果:
- 在升级后观察到T1和T2值的初始显著不匹配.
- 在供应商沟通后,3D MRF序列显示出一致的可重复性.
- 内向试验-重试的变化率为1.16 ± 3.18% (T1) 和0.54 ± 4.84% (T2).
- 交叉版本 (升级前与升级后) 的变化率为0.83 ± 3.68% (T1) 和0.05 ± 5.81% (T2).
结论:
- 通过软件升级,可以实现3D MRF协议的可靠性能.
- 详细的评估和供应商的合作对于保持一致性至关重要.
- 这些发现支持在纵向研究中使用MRF,并强调在系统修改后需要进行系统评估.
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