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同时的多切片心脏实时MRI在0.55T.
Ecrin Yagiz1, Parveen Garg2, Steven Y Cen3,4
1Ming Hsieh Department of Electrical and Computer Engineering, Viterbi School of Engineering, University of Southern California, Los Angeles, California, USA.
Magnetic resonance in medicine
|November 7, 2024
概括
同时多切片 (SMS) 实时MRI在0.55T是可行的心脏功能评估. 这种方法提供了足够的对比度来评估左心室功能在三个切片没有门.
科学领域:
- 心血管成像 - 心血管成像
- 磁共振成像是一种磁共振成像技术.
- 医学物理 医学物理
背景情况:
- 心脏CINEMRI是评估左心室 (LV) 功能的标准.
- 顺序的多切片平衡SSFP (bSSFP) 需要ECG门和喘息.
- 同时多切片 (SMS) 成像可以在更高的磁场强度下减少CINEMRI中的喘息时间.
研究的目的:
- 评估SMS实时MRI (RT-MRI) 在0.55T对心脏功能的可行性.
- 确定SMS是否有效用于心脏功能的RT-MRI评估.
- 为了将SMS与0.55T的单频段 (SB) 成像进行比较.
主要方法:
- 实现了一个SMS bSSFP脉冲序列与0.55T的金角螺旋 (SMS系数为三).
- 获取的数据涵盖了三次SMS收购和九次SB收购的LV.
- 利用时空受约束的重建,并分析图像的对比度和边缘清晰度 (ES).
主要成果:
- 在SMS和SB之间观察到血液-心肌对比度的统计学上显著的两倍差异.
- 在透气中/透气末的对比值:SMS 13.38/10.79,SB 29.05/22.26.
- 在SMS和SB之间,边缘度 (ES) 评分没有显著差异.
结论:
- 在0.55T的短信心脏RT-MRI是可行的.
- 该技术为LV功能评估提供了足够的对比.
- 三个切片的同时评估是可能的,没有门或运动假设.
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