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对于高SNR,快速溶解Xe气交换MRI的压缩传感重建
Jemima H Pilgrim-Morris1, Guilhem J Collier1,2, Ryan S Munro1
1POLARIS, Section of Medical Imaging and Technologies, Division of Clinical Medicine, School of Medicine and Population Health, University of Sheffield, Sheffield, UK.
Magnetic resonance in medicine
|September 26, 2024
概括
压缩传感 (CS) 显著改善超极化Xe气交换成像质量,并缩短扫描时间. 这种技术保留了定量气体交换指标,并显示了自然丰富性 (NA) 异成像的前景.
科学领域:
- 医疗成像医学成像
- 肺部医学 肺部医学
- 磁共振成像是一种磁共振成像技术.
背景情况:
- 超极化Xe气交成像为肺功能提供了洞察力.
- 目前的方法的信号噪声比 (SNR) 很低,需要长时间的喘息.
- 压缩传感 (CS) 是一种加速图像采集和改进SNR的潜在技术.
研究的目的:
- 为了评估气体交换比率图的定量保存,使用CS加速溶相XE成像.
- 评估使用自然丰富 (NA) 的CS加速溶相Xe成像的可行性.
主要方法:
- 在1.5T时使用多回声光谱成像序列进行了Xe气交换成像.
- CS重建 (加速因子2) 被追溯地与传统的格子重建进行了比较.
- 这项研究包括健康的志愿者,COPD患者和住院COVID-19患者.
主要成果:
- CS重建将获取时间减少了一半,并减少了背景噪音.
- 红细胞 (RBC) 的中位数SNR从6增加到11与CS.
- 在CS和格式平均比率图之间观察到强大的一致性 (R2=0.99).
- CS使NA129Xe图像的平均SNR增加了三倍.
结论:
- CS重建提高了溶解的Xe成像质量,并减少了扫描时间,同时保持了气体交换指标.
- 这一进步有利于呼吸困难和气体转移受损的患者.
- 用NA进行CS-dissolved129Xe成像是可行的,也是有前途的.
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