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和多延迟脏动脉脊柱标记技术在5T MR:与3T进行比较研究
Xinyu Tong1,2, Chen Chen3, Zihan Ning1,4
1School of Biomedical Engineering, Tsinghua University, Beijing, China.
Journal of magnetic resonance imaging : JMRI
|August 21, 2025
概括
在5特斯拉 (5T) 时使用SAMURAI序列进行脏定量成像是可行的和可重复的. 与3T相比,5T成像显示更高的信号与噪声比率 (SNR) 和对比度与噪声比率 (CNR),血流量 (RBF) 的测量结果与此有很强的一致性.
科学领域:
- 磁共振成像 (MRI)
- 脏生理学
- 医学成像技术
背景情况:
- 对于5特斯拉 (5T) 的脏成像,多延迟动脉旋转标签 (ASL) 的可行性尚未得到充分确立.
- 动脉旋转标记 (ASL) 是一种用于测量血液流动的非侵入性MRI技术.
研究的目的:
- 在5T评估和多延迟脏ASL (SAMURAI) 序列的可行性.
- 为了比较5T和3T的SAMURAI序列的图像质量和 perfusion量化.
主要方法:
- 一个前性,横截面研究,涉及20名健康志愿者进行初级比较和6名5T的可重复性.
- 在5T时,SAMURAI序列使用特异性B1闪和优化和方案进行了优化.
- 参与者接受了3T和5T扫描;测量了皮质T1值,脏血流 (RBF) 和玻尿酸到达时间. 计算了信号与噪声比率 (SNR) 和皮质髓对比与噪声比率 (CNR).
主要成果:
- 皮T1值在5T (1417. 9毫秒) 与3T (1184. 2毫秒) 相比显著更高.
- 皮层RBF在5T和3T之间没有显著差异 (p=0. 333),具有强烈的相关性 (R2=0. 914).
- 5T的平均SNR (4. 6比3. 9) 和CNR (3. 2比2. 0) 显著高于3T,具有很好的重复性和可重复性 (ICC=0. 855- 0. 973).
结论:
- 在5T时进行定量性脏成像,SAMURAI序列是可行的和可重复的.
- 与3T相比,5T成像提供了更好的SNR和CNR.
- 在3T和5T之间的皮质RBF测量有很强的一致性,支持5T在透评估中的有用性.
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