低级受约束的需要-导航器重建多次射击DWI的重建
概括
这项研究引入了扩散权重成像 (DWI) 的新方法,以减少不需要长时间的预扫描的文物. 该技术通过纠正相位错误来提高多镜头DWI (MSDWI) 图像质量.
科学领域:
- 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:
- 扩散加权成像 (DWI) 往往需要额外的数据采集来抑制文物.
- 奇偶回声和运动诱导的相位错误是DWI中常见的工件.
研究的目的:
- 开发一种有效的方法来纠正多次射击DWI (MSDWI) 的相位错误.
- 在不需要耗时的预扫描的情况下,以抑制DWI中的文物.
主要方法:
- 一个修改的旋回回声DWI序列,附加180°射频脉冲来获取导航回声数据.
- 利用正负梯度进行独立的导航回声数据捕获.
- 使用低级约束算法与重新获取的导航器回声数据来纠正相位错误.
主要成果:
- 拟议的方法有效地抑制了MSDWI中相位错误引起的图像工件.
- 模拟研究和体内脑部成像验证了该技术的有效性.
- 在没有额外的耗时的预扫描的情况下实现了文物抑制.
结论:
- 修改后的DWI序列为MSDWI的相位错误纠正提供了一个有效的解决方案.
- 这种方法通过减少文物而提高图像质量,而不会增加扫描时间.
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