无扭曲,自由呼吸,呼吸解决3D扩散权重成像腹部的成像
Philip K Lee1, Xuetong Zhou1,2, Nan Wang1
1Radiology, Stanford University, Stanford, California, USA.
Magnetic resonance in medicine
|April 30, 2024
概括
一个新的自由呼吸扩散加权成像序列消除了腹部扫描的运动器件. 这种技术提供了没有扭曲的图像,提高了诊断准确度,而不需要喘息.
科学领域:
- 磁共振成像 (MRI) 是一种磁共振成像技术.
- 医学成像物理 医学成像物理
背景情况:
- 呼吸运动显著降低了腹部MRI质量,需要呼吸或触发.
- 扩散加权成像 (DWI) 对于对比度至关重要,但受到长时间扫描和运动灵敏度的限制.
- 对DWI常见的回声平面成像 (EPI) 患有非共振器件.
研究的目的:
- 提出一种新的呼吸解决,3D扩散准备的MRI序列,用于自由呼吸的腹部成像.
- 开发技术,在自由呼吸期间获得无扭曲的DWI,克服EPI的限制.
主要方法:
- 结合了两次重新聚焦的,M1无效的扩散制剂与RF破坏的梯度回声读出.
- 采用卡特西安采样用于3D射击对射击相位导航和脂肪人工物减少.
- 实施了基于区域的注射排斥方法,在各种呼吸条件下进行评估.
主要成果:
- 拟议的序列在体内产生了没有扭曲的扩散权重图像,性能优于多镜头DW-EPI.
- 在同质性和各种呼吸运动模式中对B0/B1场的强度被证明.
- 实现了临床可行的重建时间.
结论:
- 自由呼吸,无扭曲的扩散加权腹部成像是可行的.
- 该序列使得高质量的DWI无需喘息,增强临床实用性.
- 提供了一个强大的替代传统EPI对于腹部DWI.
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