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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: Jul 20, 2025

Metabolic Support of Excised, Living Brain Tissues During Magnetic Resonance Microscopy Acquisition
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一个温度控制的冷却系统,用于准确的定量 post-mortem MRI.

Sebastian W Rieger1, Aaron Hess2, Yang Ji2

  • 1Wellcome Centre for Integrative Neuroimaging, Oxford Centre for Human Brain Activity, Department of Psychiatry, University of Oxford, Oxford, UK.

Magnetic resonance in medicine
|August 2, 2023
PubMed
概括
此摘要是机器生成的。

一个新的冷却系统在死后的MRI扫描中保持稳定的组织温度,提高了未固定组织样本定量成像的准确性. 这个系统对于可靠的扩散MRI数据分析至关重要.

关键词:
这就是为什么MRI是MRI.这是死后的尸体.定量成像技术 定量成像技术温度的温度的温度的温度的温度.没有固定,没有固定.

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科学领域:

  • 医疗成像医学成像
  • 生物物理学的生物物理.
  • 材料科学 材料科学 材料科学

背景情况:

  • 死后MRI受到组织加热的挑战,导致不准确的定量测量.
  • 不固定组织需要精确的温度控制,以获得可靠的成像,因为它对热变化的敏感性.
  • 现有的MRI设置缺乏足够的温度管理,以进行延长的死后扫描.

研究的目的:

  • 设计一个温度控制的冷却系统,用于定量死后MRI.
  • 为了能够准确地扫描未被固定的生物组织.
  • 为了尽量减少磁共振成像 (MRI) 扫描期间的温度偏移.

主要方法:

  • 开发并集成了一个水冷系统与一个7特斯拉 (7T) MRI扫描仪.
  • 优化了系统的操作方便和快速部署不固定样本.
  • 在猪组织上使用7小时的扩散MRI协议评估性能,插入定量T1,T2和ADC映射来评估温度依赖性.

主要成果:

  • 在整个扩散MRI扫描过程中,冷却系统保持了稳定的组织T1,T2和ADC值.
  • 没有温度控制的常规扫描导致组织参数的大幅变化.
  • 通过冷却系统实现了准确的生物物理模型参数估计,与显示偏差结果的传统设置不同.

结论:

  • 开发的温度控制冷却系统有效地解决了死后成像中的加热问题.
  • 该系统提高了定量死后MRI的准确性和可靠性.
  • 它可以长时间扫描未被固定的组织,扩大死后研究的可能性.