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

Super-resolution Fluorescence Microscopy01:37

Super-resolution Fluorescence Microscopy

6.9K
Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been...
6.9K
Magnetic Resonance Imaging01:24

Magnetic Resonance Imaging

4.9K
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...
4.9K

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

Estimation of Hand Grip Strength Using a Grip Force Transducer in Healthy Volunteers.

Cureus·2026
Same author

Ligand Geometry Regulated Architecture of Ultra-Microporous Flexible Guanidinium-Based Hydrogen-Bonded Organic Frameworks for Highly Selective Nitrous Oxide/Nitrogen Separation.

Small (Weinheim an der Bergstrasse, Germany)·2026
Same author

Pitfalls of therapies targeting the nitric oxide signaling pathway in heart failure with preserved ejection fraction.

Journal of cardiovascular pharmacology·2026
Same author

Genomic and clinical determinants of outcome in Irish AML: a real-world analysis (2007-2025), single centre experience.

Annals of hematology·2026
Same author

OMAMA-DB: the Oregon-Massachusetts Mammography Database.

Journal of medical imaging (Bellingham, Wash.)·2026
Same author

When double-J stents become a risk: bilateral distal ureteric urothelial carcinoma following ureteric instrumentation: a case report.

BMC urology·2026

相关实验视频

Updated: May 28, 2025

Magnetic Resonance Imaging Quantification of Pulmonary Perfusion using Calibrated Arterial Spin Labeling
12:29

Magnetic Resonance Imaging Quantification of Pulmonary Perfusion using Calibrated Arterial Spin Labeling

Published on: May 30, 2011

13.5K

条件扩散生成的超分辨率用于心肌 perfusion MRI 的条件扩散.

Changyu Sun1,2, Neha Goyal3, Yu Wang1

  • 1Department of Chemical and Biomedical Engineering, University of Missouri, Columbia, MO, United States.

Frontiers in cardiovascular medicine
|February 10, 2025
PubMed
概括
此摘要是机器生成的。

这项研究引入了一种基于扩散的生成模型,以改善心肌 perfusion MRI 质量. 这种新的方法提高了图像分辨率和覆盖范围,为诊断冠状动脉疾病提供了一个有希望的替代方案.

关键词:
条件生成模型的条件生成模型深度学习是一种深度学习.扩散概率模型 (DDPM) 是一种传播概率模型.动态对比增强型MRI (DCE MRI) 是一种动态对比增强型MRI.肌心输液MRI 磁力共振成像超级分辨率的超级分辨率

更多相关视频

A Magnetic Resonance Imaging Protocol for Stroke Onset Time Estimation in Permanent Cerebral Ischemia
09:59

A Magnetic Resonance Imaging Protocol for Stroke Onset Time Estimation in Permanent Cerebral Ischemia

Published on: September 16, 2017

14.0K
Simultaneous PET/MRI Imaging During Mouse Cerebral Hypoxia-ischemia
10:35

Simultaneous PET/MRI Imaging During Mouse Cerebral Hypoxia-ischemia

Published on: September 20, 2015

12.2K

相关实验视频

Last Updated: May 28, 2025

Magnetic Resonance Imaging Quantification of Pulmonary Perfusion using Calibrated Arterial Spin Labeling
12:29

Magnetic Resonance Imaging Quantification of Pulmonary Perfusion using Calibrated Arterial Spin Labeling

Published on: May 30, 2011

13.5K
A Magnetic Resonance Imaging Protocol for Stroke Onset Time Estimation in Permanent Cerebral Ischemia
09:59

A Magnetic Resonance Imaging Protocol for Stroke Onset Time Estimation in Permanent Cerebral Ischemia

Published on: September 16, 2017

14.0K
Simultaneous PET/MRI Imaging During Mouse Cerebral Hypoxia-ischemia
10:35

Simultaneous PET/MRI Imaging During Mouse Cerebral Hypoxia-ischemia

Published on: September 20, 2015

12.2K

科学领域:

  • 心血管成像 - 心血管成像
  • 医疗成像中的人工智能
  • 医学图像分析 医学图像分析

背景情况:

  • 心肌输液MRI对于诊断冠状动脉疾病至关重要.
  • 目前的方法难以平衡空间分辨率,时间分辨率和切片覆盖率.
  • 现有的技术,如并行成像和压缩传感具有限制,包括噪音和文物.

研究的目的:

  • 开发一种基于条件扩散的生成模型,用于心肌输液MRI超分辨率.
  • 为了解决时空分辨率,切片覆盖率和图像质量之间的权衡问题.
  • 以提高低分辨率的 perfusion 图像成为高分辨率的输出,而无需时间规范化.

主要方法:

  • 针对超分辨率的适应性去散扩散概率模型 (DDPM).
  • 使用U-Net架构进行渐进式无线化过程,条件是低分辨率输入.
  • 在回顾性动态对比增强 (DCE) perfusion MRI 数据上训练并验证了模型.

主要成果:

  • 实现了显著的图像质量改进:nRMSE减少5.1%,PSNR增加1.1%,与GAN相比SSIM提升2.2% (P<0.05).
  • 在前性研究中,通过5-6个切片实现了8.5倍的加速.
  • 在盲人专家评估中,它在度和整体图像质量方面表现优于基于GAN的方法 (P<0.05).

结论:

  • 基于扩散的生成模型可以有效地从低分辨率输入中生成高分辨率的心肌 perfusion MRI.
  • 这种方法显示了加速MRI采集的潜力,同时提高了切片覆盖率和时间分辨率.
  • 为当前用于增强CAD诊断的方法提供了一个有希望的替代方案.