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Assessment of Diffusion and Perfusion01:17

Assessment of Diffusion and Perfusion

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Understanding and evaluating diffusion and perfusion is critical in assessing a patient's respiratory and circulatory health. These processes play key roles in maintaining the body's internal environment, ensuring that tissues receive adequate oxygen while waste products are efficiently removed.
The Role of Diffusion in Respiration
Diffusion is the process by which molecules move from an area of higher concentration to an area of lower concentration. In the respiratory system, this...
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相关实验视频

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Diffusion Tensor Magnetic Resonance Imaging in the Analysis of Neurodegenerative Diseases
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从婴儿期到成年早期的白质路径的体积变化,使用基于扩散张量的形态测量来测量.

Amritha Nayak1, Rakibul Hafiz1, M Okan Irfanoglu1

  • 1Laboratory on Quantitative Medical Imaging, National Institute of Biomedical Imaging and Bioengineering, Bethesda, MD, United States.

Frontiers in neurology
|September 29, 2025
PubMed
概括
此摘要是机器生成的。

基于扩散张数的形态测量揭示了儿童和青少年大脑通路中明显的白质体积发育. 白质体积增长轨迹因地区而异,一些轨迹显示长期发展到年轻成人.

关键词:
大脑发育大脑的发育大脑的发展扩散张力成像技术 (DTI)增长轨迹的发展轨迹形态测量法 形态测量法 形态测量法儿科 儿科 儿科在这个过程中,体积体积体积体积量.

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相关实验视频

Last Updated: Jan 16, 2026

Diffusion Tensor Magnetic Resonance Imaging in the Analysis of Neurodegenerative Diseases
09:33

Diffusion Tensor Magnetic Resonance Imaging in the Analysis of Neurodegenerative Diseases

Published on: July 28, 2013

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Probing the Brain in Autism Using fMRI and Diffusion Tensor Imaging
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科学领域:

  • 神经成像是一种神经成像.
  • 发育神经科学的发展神经科学.
  • 生物医学工程 生物医学工程

背景情况:

  • 扩散张力成像 (DTI) 对于研究白质 (WM) 发育至关重要.
  • 基于扩散张量的形态学 (DTBM) 量化了WM通路中的局部体积变化.
  • 之前的研究强调了DTBM在神经疾病中的实用性.

研究的目的:

  • 评估在典型发育的儿童出生后大脑发育期间的DTBM体积变化.
  • 在特定的WM路径中评估体积变化和DTI指标之间的关系.

主要方法:

  • 利用来自NIH儿科MRI数据 (NIHPD) 的182名健康儿童 (0-21岁) 的DTI数据.
  • 使用TORTOISE处理数据,并使用DRTAMAS创建特定年龄的模板.
  • 在年轻成人模板上定义了ROI,并分析了两个年龄段的发育轨迹.

主要成果:

  • 在不同地区观察到WM体积发育轨迹的显著差异.
  • 估计的出生量在成人值的12-53%之间,年增长率在1部分 (0-2.69岁) 为3-30%,在2部分为0-4%.
  • 卷度变化通常比扩散指标的变化更大,更长时间,一些地区在扩散指标停滞后继续增长.

结论:

  • DTBM揭示了路径特定的WM体积发展轨迹,与DTI指标不同.
  • 未来的研究应该利用更大的队列来将DTBM发现与认知和行为变化相关联.
  • 建立规范性的DTBM值对于未来的临床应用至关重要.