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相关概念视频

Assessment of Ventilation II: Respiratory Depth and Rhythm01:29

Assessment of Ventilation II: Respiratory Depth and Rhythm

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Respiratory Depth
Respiratory depth measures the volume of air inhaled or exhaled during a breath. It can vary from shallow to deep and typically remains consistent when a person is at rest or asleep. Occasionally, individuals will automatically inhale deeply, known as sighing, which inflates the lungs with more air than normal breathing.
To assess respiratory depth, observe the degree of chest excursion or movement:
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相关实验视频

Updated: Jan 16, 2026

Quantitative Mapping of Specific Ventilation in the Human Lung using Proton Magnetic Resonance Imaging and Oxygen as a Contrast Agent
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使用表面追踪辅助的时间解析多循环4D肺部MRI捕捉呼吸变化.

Xiao Liang1, Li Pan2, Erez Nevo3

  • 1University of Maryland School of Medicine, Baltimore, MD, United States of America.

Physics in medicine and biology
|October 2, 2025
PubMed
概括
此摘要是机器生成的。

时间解析多循环MRI (TRMC-MRI) 在4D肺成像中捕捉呼吸变化. 这种新方法追踪胸腔腹部运动,为MR导向肺放射治疗提供了关键数据.

关键词:
4D磁力共振成像 4D磁力共振成像呼吸变化 呼吸变化肺 肺 肺 肺 肺 肺 肺 肺 肺多个周期的多循环.时间解决的时间解决.

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科学领域:

  • 医疗成像医学成像
  • 放射疗法是一种放射治疗.
  • 肺部病理学 肺部病理学

背景情况:

  • 准确的4D肺部成像对于MR指导放射治疗至关重要.
  • 呼吸引起的解剖变异对肺部成像具有挑战.
  • 现有的方法可能无法完全捕捉循环到循环的呼吸变化.

研究的目的:

  • 开发用于4D肺成像的时间解析多循环MRI (TRMC-MRI).
  • 为了捕捉呼吸诱导的循环到循环变化在内部肺部解剖学.
  • 通过改进的运动洞察力,协助MR导向的肺放射治疗.

主要方法:

  • 金角3D星堆梯度回声数据获取时间2分钟.
  • 使用MRI兼容的传感器同时跟踪胸腔腹部运动.
  • 使用主要组件分数和并行成像与电视规范化的动态肺体积的重建.

主要成果:

  • 经过循环对循环的显著呼吸变化 (周期:8%-23%,振幅:7%-36%).
  • 在23.2个平均呼吸周期中以60.6毫秒的间隔生成动态肺体积.
  • 在时间解析的多循环运动中捕获了相当大的呼吸变化.

结论:

  • 表面追踪辅助的TRMC-MRI在4D肺成像中有效捕捉呼吸变化.
  • 该框架为肺放射治疗规划和实时治疗提供了关键信息.
  • TRMC-MRI增强了运动建模,预测和训练的肺放射治疗.