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Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
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相关实验视频

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Co-analysis of Brain Structure and Function using fMRI and Diffusion-weighted Imaging
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在球体解卷中估计局部响应功能,用于使用扩散MRI进行全面组织表示.

Siebe Leysen1,2, Ahmed Radwan2,3, Frederik Maes1,2

  • 1Department of Electrical Engineering, ESAT/PSI, KU Leuven, Leuven, Belgium.

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概括
此摘要是机器生成的。

在球体解卷 (LoRE-SD) 中进行局部响应功能的估计可以改善扩散MRI分析,特别是在病理学方面. 这种新的方法增强了纤维定向重建和大脑中的通道图.

关键词:
扩散磁力共振成像 (MRI) 扩散质瘤 质瘤 是一种球形解卷是指球形解卷.路径学 路径学 路径学 路径学 路径学

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相关实验视频

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科学领域:

  • 神经成像是一种神经成像.
  • 生物医学工程 生物医学工程
  • 医学物理 医学物理

背景情况:

  • 扩散MRI (dMRI) 对于理解组织微观结构和纤维方向至关重要.
  • 目前的dMRI分析方法依赖于简化的模型,限制了它们在病理条件下的准确性.
  • 需要先进的dMRI分析技术,尽量减少关于组织微观结构的假设.

研究的目的:

  • 引入一种新的方法,LoRE-SD (球体解卷中的局部响应函数估计),以改进dMRI数据重建.
  • 为了提高纤维方向估计和健康和病态大脑组织的通道图的准确性.
  • 为了能够生成新的图像对比度,以便进行更灵活的dMRI分析.

主要方法:

  • 开发了LoRE-SD,这种方法通过使用一般信号表示来最小化关于组织微观结构的假设.
  • 采用球形解卷方法,从dMRI数据中估计局部光纤方向.
  • 使用模拟和体内dMRI数据从健康志愿者和质瘤患者验证了方法.

主要成果:

  • LoRE-SD准确地重建了整个大脑的纤维方向.
  • 与最先进的方法相比,显著改善了结质瘤和纤维捆的重建.
  • 促进了各种图像对比度的生成,增强了绘图灵活性.

结论:

  • LoRE-SD提供了一个以数据为导向的,以最小的先前假设为基础的组织微观结构的局部表示.
  • 这个框架提供了一种使用dMRI表示大脑结构和病理的新方法.
  • LoRE-SD为定义新型图像对比而开辟了新的途径,有利于绘图学.