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相关概念视频

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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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Cardiovascular magnetic resonance imaging, or CMRI, is a non-invasive diagnostic test that employs a magnetic field and radiofrequency waves to create precise images of the heart and arteries. It provides comprehensive information about cardiac anatomy, function, perfusion, and tissue characterization without ionizing radiation.IndicationsCMRI diagnoses various heart conditions, including tissue damage from heart attacks, ischemic heart disease, myocarditis, aortic issues (tears, aneurysms,...
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相关实验视频

Updated: Jun 5, 2025

Measuring the Influence of Magnetic Vestibular Stimulation on Nystagmus, Self-Motion Perception, and Cognitive Performance in a 7T MRT
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在MRI扫描仪内使用电磁线圈跟踪头部运动,使用电磁线圈.

E H Bhuiyan1,2, M E H Chowdhury1,3, P M Glover1

  • 1Sir Peter Mansfield Imaging Centre, School of Physics and Astronomy, University of Nottingham, Nottingham, NG7 2RD, UK.

Heliyon
|December 13, 2024
PubMed
概括
此摘要是机器生成的。

这项研究引入了一种用于MRI的前运动校正的新方法,通过测量头部装配线圈中的诱导电压变化. 这种技术准确地跟踪头部运动,提高脑部成像质量.

关键词:
线圈阵列数组是一个线圈阵列.电磁场追踪器可以追踪电磁场.头部运动的运动.未来的汽车行业前景实时运动跟踪实时运动跟踪

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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.
  • 电磁主义 电磁主义

背景情况:

  • 在脑MRI中预期的运动校正对于准确的成像至关重要.
  • 无意识的头部运动在MRI采集中构成了重大挑战.
  • 对于先进的MRI技术来说,对头部运动的实时监测是必不可少的.

研究的目的:

  • 开发一种创新的方法,用于MRI的前性运动校正.
  • 为了研究在线圈中诱导电压变化的使用,以跟踪头部运动.
  • 在MRI扫描仪中创建一个用于准确实时测量头部位置和方向的系统.

主要方法:

  • 在循环线圈中模拟诱导的电压变化,由于时间变化的磁场梯度.
  • 对于不同的线圈位置和方向 (POSE) 的计算电压.
  • 开发了一个线性方程系统和一个校准矩阵,使用五线圈系统的电压数据来估计POSE.

主要成果:

  • 确定电压变化可以准确计算线圈系统的POSE变化.
  • 开发了能够稳定测量头部运动六度自由度的软件,精度高达0.3毫米.
  • 证明系统即使增加了噪声电压 (高达20μV),也保持了准确性.

结论:

  • 拟议的基于电磁场的实时跟踪方法具有高度准确性和非侵入性.
  • 这种技术可以在MRI扫描仪中准确识别线圈和头部.
  • 该方法与标准的MRI硬件兼容,为预期的运动校正提供了实用解决方案.