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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: Jun 2, 2025

Magnetic Resonance Imaging Quantification of Pulmonary Perfusion using Calibrated Arterial Spin Labeling
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静止状态 BOLD - perfusion 合模式使用多带多回声伪连续动脉旋转标签成像.

Alexander D Cohen1, Stefano Moia2,3, G Bruce Pike4

  • 1Department of Radiology, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI, 53226, USA. acohen@mcw.edu.

Scientific reports
|January 15, 2025
PubMed
概括
此摘要是机器生成的。

这项研究使用先进的MRI在健康成年人中探索了大脑血液流动和氧化合. 研究结果揭示了主要大脑网络中明显的合模式,这表明神经血管研究的潜力.

关键词:
动脉旋转标签的标签大胆的 大胆的BOLD-CBF合器的合方式多重回声 多重回声多频带多频带

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科学领域:

  • 神经成像是一种神经成像.
  • 神经血管生理学 神经血管生理学
  • 大脑功能 大脑功能

背景情况:

  • 神经血管合 (NVC) 改变与衰老和神经退行有关.
  • 同时测量脑血流 (CBF) 和依赖于血液氧化的 (BOLD) 信号,可以了解神经血管动力学.
  • 休息状态 (RS) 功能磁共振成像 (fMRI) 度量可以从BOLD数据中导出.

研究的目的:

  • 通过同时使用ASL和BOLD数据来评估BOLD-CBF合的模式.
  • 为了将BOLD-CBF合与静止状态fMRI指标相关联.
  • 评估这些合指标的可变性,可重复性和可靠性.

主要方法:

  • 采用多带多回声 (MBME) 伪连续动脉旋转标记 (pCASL) 序列,同时获取 BOLD 和 ASL 数据.
  • 在健康对照对象中分析了BOLD-CBF合模式.
  • 在多会话子组中的合指标的计算可变性,可重复性和可靠性.

主要成果:

  • 在视觉,运动,头皮和额叶皮层观察到更高的BOLD-CBF合,与主要的大脑网络保持一致.
  • 在合和BOLD RS测量之间发现了显著的相关性.在合较高的区域.
  • 与BOLD RS指标相比,合指标的变化性更高,可靠性更低.

结论:

  • BOLD-CBF合指标显示出研究神经血管生理学的前景.
  • 这些发现突显了同时使用BOLD-ASL成像来了解大脑功能和功能障碍的潜力.
  • 需要进一步的研究来完善这些合指标的可靠性和应用.