Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Magnetic Resonance Imaging01:24

Magnetic Resonance Imaging

6.9K
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...
6.9K
Assessment of Diffusion and Perfusion01:17

Assessment of Diffusion and Perfusion

1.1K
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...
1.1K

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Custom integration of a magnetic-field monitoring system into a 32-channel MRI head coil.

Magnetic resonance in medicine·2024
Same author

SAD: semi-supervised automatic detection of BOLD activations in high temporal resolution fMRI data.

Magma (New York, N.Y.)·2024
Same author

A Temporal Instability Measure for fMRI Quality Assurance.

Journal of magnetic resonance imaging : JMRI·2023
Same author

HiHi fMRI: a data-reordering method for measuring the hemodynamic response of the brain with high temporal resolution and high SNR.

Cerebral cortex (New York, N.Y. : 1991)·2022
Same author

Quantifying myelin in crossing fibers using diffusion-prepared phase imaging: Theory and simulations.

Magnetic resonance in medicine·2021
Same author

An empirical investigation of the benefit of increasing the temporal resolution of task-evoked fMRI data with multi-band imaging.

Magma (New York, N.Y.)·2021

相关实验视频

Updated: Sep 11, 2025

Quantitative Magnetic Resonance Imaging of Skeletal Muscle Disease
09:30

Quantitative Magnetic Resonance Imaging of Skeletal Muscle Disease

Published on: December 18, 2016

19.7K

DIM:用于MRI质量保证的扩散不稳定性测量.

Tim Schmidt1,2, Zoltan Nagy1

  • 1Laboratory for Social and Neural Systems Research (SNS Lab), University of Zurich, Zurich, Switzerland.

Magnetic resonance in medicine
|August 11, 2025
PubMed
概括

一种新的扩散不稳定性测量 (DIM) 量化了高角度分辨率扩散成像 (HARDI) 扫描中的图像质量. 这种敏感的工具不需要硬件或软件修改才能实现.

科学领域:

  • 医疗成像医学成像
  • 扩散式核磁共振成像 (MRI)

背景情况:

  • 高角分辨率扩散成像 (HARDI) 对于神经成像至关重要.
  • 确保HARDI中的图像质量对于准确的结果至关重要.
  • 目前的质量保证方法可能有限.

研究的目的:

  • 为 HARDI 质量保证开发一个扩散不稳定性测量 (DIM).
  • 为评估 HARDI 数据完整性建立一个定量指标.

主要方法:

  • 采集了使用3T扫描仪 (Philips Achieva,Siemens Cima.X) 对幻影的HARDI扩散数据.
  • 在扩散方向之间计算了相关系数矩阵.
  • 定义DIM为1减去相关性矩阵的自比.

主要成果:

  • 在数据集中,DIM值有很大的差异 (5000280,000 ppm).
  • 在Philips Achieva上观察到的b值=4000s/mm2的最高DIM (最差质量).
  • 在没有现场监测的情况下,在西门子Cima.X上观察到的b值=500s/mm2的最低DIM (最佳质量).

结论:

关键词:
这就是为什么MRI是MRI.扩散扩散是一种扩散.这是不稳定的不稳定.磁场监测 磁场监测 磁场监测质量保证 质量保证 质量保证

更多相关视频

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

28.6K
Diffusion Imaging in the Rat Cervical Spinal Cord
10:46

Diffusion Imaging in the Rat Cervical Spinal Cord

Published on: April 7, 2015

11.8K

相关实验视频

Last Updated: Sep 11, 2025

Quantitative Magnetic Resonance Imaging of Skeletal Muscle Disease
09:30

Quantitative Magnetic Resonance Imaging of Skeletal Muscle Disease

Published on: December 18, 2016

19.7K
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

28.6K
Diffusion Imaging in the Rat Cervical Spinal Cord
10:46

Diffusion Imaging in the Rat Cervical Spinal Cord

Published on: April 7, 2015

11.8K
  • DIM是一个敏感的,定量工具来评估HARDI图像质量.
  • 该方法很容易实现,不需要硬件或软件修改.
  • DIM有助于在扩散MRI研究中提供强有力的质量保证.