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相关概念视频

Magnetic Resonance Imaging01:24

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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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When magnetic nuclei in a sample achieve resonance and undergo relaxation, the signal detected in NMR is an approximately exponential free induction decay. Fourier transform of an exponential decay yields a Lorentzian peak in the frequency domain. Lorentzian peaks in an NMR spectrum are defined by their amplitude, full width at half maximum, and position, where the peak width is governed by the spin-spin relaxation time alone. In real experiments, however, the applied magnetic field is rendered...
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A thermometer measures body temperature. The common sites for measuring body temperature are the oral cavity, axillary region, temporal artery, and skin surface, such as the forehead, abdomen, and axilla. True core body temperature is assessed in the rectum, tympanic membrane, pulmonary artery, esophagus, and urinary bladder.
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Quantitative Magnetic Resonance Imaging of Skeletal Muscle Disease
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运动强大的MR温度计技术进步.

Kisoo Kim1, Kazim Narsinh1, Eugene Ozhinsky1

  • 1Department of Radiology & Biomedical Imaging, University of California, San Francisco, California, USA.

Magnetic resonance in medicine
|March 19, 2024
PubMed
概括
此摘要是机器生成的。

运动显著阻碍了质子共振频率转移 (PRFS) 的MR温度计. 本综述考察了运动强大的MRI技术,指导在热处理中精确监测温度的选择.

关键词:
磁共振测温仪的使用方法运动校正,运动校正.运动 坚固 坚固 强大质子共振频率转移的变化实时核磁共振成像 (MRI) 的时间.

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科学领域:

  • 磁共振成像是一种磁共振成像技术.
  • 医学物理 医学物理
  • 生物医学工程 生物医学工程

背景情况:

  • 质子共振变频 (PRFS) MR温度计对于临床热疗法至关重要,因为它的速度和温度灵敏度.
  • 运动工件,包括图像错误注册和易感性变化,引入相位错误,损害移动器官的PRFS准确性.
  • 现有的MR温度计运动校正技术涉及体积覆盖,处理速度和温度精度的权衡.

研究的目的:

  • 综合审查当前先进的MRI技术,以进行运动稳固的MRI温度计.
  • 建议针对不同的热处理应用量身定制的特定的运动强度MR温度计策略.
  • 引导选择合适的技术,并激发临床MR温度计的未来发展.

主要方法:

  • 对于运动稳固的MRI温度计的尖端MRI技术的审查.
  • 对各种方法的体积覆盖,加工时间和温度精度之间的权衡分析.
  • 根据应用要求对技术进行分类 (例如,高温与消融).

主要成果:

  • 确定了MR温度计当前运动校正技术的固有局限性和权衡.
  • 突出了在高温和废除程序中对时间分辨率与温度准确性的差异性需求.
  • 根据临床应用建立了一个选择运动稳固MR温度计的框架.

结论:

  • 选择运动稳固的MR温度计策略必须与热处理应用的特定需求保持一致.
  • 精确的温度测量在高温症中至关重要,而在切除过程中快速升温的监测需要高时间分辨率.
  • 这一审查有助于明智地选择MR温度计技术,并促进临床实践中运动强度体积MR温度计的进步.