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相关概念视频

Magnetic Resonance Imaging01:24

Magnetic Resonance Imaging

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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Introduction:Magnetic Resonance Imaging, or MRI, can include a specialized imaging technique of the urinary system known as Magnetic Resonance Urography (MRU). This radiation-free technique uses strong magnetic fields and radio waves to produce detailed images with the help of a computer. MRU is particularly effective for visualizing fluid-filled structures like the kidneys, ureters, and bladder.Applications of MRI in the Genitourinary SystemKidneys and Ureters: MRI detects tumors, cysts,...

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相关实验视频

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Registered Bioimaging of Nanomaterials for Diagnostic and Therapeutic Monitoring
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两参数预扫描校准梯度诱导的采样错误,用于罗塞特MRI.

Peter Latta1, Radovan Jiřík2, Jiří Vitouš2

  • 1Central European Institute of Technology, Masaryk University, Brno, Czech Republic.

Magnetic resonance in medicine
|October 22, 2024
PubMed
概括

罗塞特MRI k空间采样的新校准方法纠正了错位,显著提高了图像质量并减少了工件. 这种强大的两参数方法提高了在磁共振成像中常规实验使用的精度.

关键词:
梯度的不完美 梯度的不完美k-空间不对齐的错误调整罗塞特轨迹的轨迹是不同的.运行轨迹的估计.

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科学领域:

  • 医疗成像医学成像
  • 磁共振成像 (MRI) 是一种磁共振成像技术.

背景情况:

  • 罗塞特MRI k空间采样可能会出现错位.
  • 图像工件是未经纠正的罗塞特MRI数据中的一个常见问题.

研究的目的:

  • 开发一个简单,强大,易于使用的对罗塞特MRI的校准程序.
  • 为了纠正k空间采样错位并最大限度地减少图像工件.

主要方法:

  • 实现了快速自动校准扫描,以捕捉罗塞特收购轨迹的时间进程.
  • 设计了一个两参数模型,以使用测量的梯度延迟来近似实际的 rozette 采样轨迹.
  • 评估了校准方法对幽灵和人类实验对象的性能.

主要成果:

  • 与未经纠正的数据相比,幻影和体内图像保真度的显著改善.
  • 证明了双参数校准方法的增强精度和可靠性.
  • 定量放松计分析证实了这些改善.

结论:

  • 数据采样纠正对于罗塞特核磁共振是必不可少的.
  • 拟议的双参数罗塞特轨迹校准是强大的,易于实施,适合常规使用.
  • 这种方法有效地减少了文物,并改善了罗塞特MRI中的图像质量.