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相关概念视频

Magnetic Resonance Imaging01:24

Magnetic Resonance Imaging

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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

Updated: May 1, 2026

Quantitative Magnetic Resonance Imaging of Skeletal Muscle Disease
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Quantitative Magnetic Resonance Imaging of Skeletal Muscle Disease

Published on: December 18, 2016

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量化肌肉水T2映射使用射频相调节的3D梯度回声成像.

Eléonore Vermeulen1, Pierre-Yves Baudin1, Marc Lapert2

  • 1NMR Laboratory, Neuromuscular Investigation Center, Institute of Myology, Paris, France.

Magnetic resonance in medicine
|May 6, 2025
PubMed
概括
此摘要是机器生成的。

一个新的3DMRI序列准确地估计了骨肌肉中的水T2,即使有运动. 这种方法改善了肌肉组织的表征,适合临床研究.

关键词:
这就是为什么MRI是MRI.肌肉成像技术 肌肉成像技术无线电频率破坏破坏水 T2 水 T2 在水中

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科学领域:

  • 磁共振成像技术 磁共振成像技术
  • 生物医学工程 生物医学工程
  • 肌肉骨成像系统的成像

背景情况:

  • 水T2放松时间是骨肌肉组织特征的关键生物标志物.
  • 精确的T2估计在骨肌肉中具有挑战性,因为运动和B1场的不均性.
  • 现有的方法往往缺乏 in vivo 应用所需的速度和稳定性.

研究的目的:

  • 开发和验证一个运动稳固的3D磁共振成像 (MRI) 序列,以准确地估计骨肌肉中的水T2.
  • 评估该序列在幻体和体内表现,包括其能够考虑B1变异和脂肪含量等混因素的能力.

主要方法:

  • 采用了部分破坏的梯度回声 (pSPGR) 序列,获得了10个图像体积,具有不同的射频相位循环和翻转角度.
  • 使用双组分的水/脂肪模型来适应复杂的信号演变,提取T2值,同时对B1和脂肪分数进行校正.
  • 该序列在笛卡尔和辐射轨迹中实施,通过数值模拟,幻象研究和在腿部和舌头肌肉上的体内实验进行验证.

主要成果:

  • 幻影研究显示,拟议方法与参考光谱/多旋回声技术之间存在很高的相关性 (R2>0.8).
  • 在体内,T2值与健康肌肉 (R2 = 0.69) 和病态肌肉 (R2 = 0.87) 的参考方法相对应得很好,证明了对B1异质性的强度 (R2 = 0.06).
  • 与卡特西安方法相比,辐射实现显著降低了舌头肌肉T2值的标准偏差28%.

结论:

  • 拟议的3D序列可以在骨肌肉中高效准确地估计水T2,包括像舌头这样的小型移动结构.
  • 这种技术扩大了特征异质肌肉损伤的潜力.
  • 该方法与临床研究持续时间的兼容性使其成为评估肌肉组织的宝贵工具.