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相关概念视频

Magnetic Resonance Imaging01:24

Magnetic Resonance Imaging

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...
Imaging Studies for Cardiovascular System IV: CMRI01:21

Imaging Studies for Cardiovascular System IV: CMRI

Cardiovascular magnetic resonance imaging, or CMRI, is a non-invasive diagnostic test that employs a magnetic field and radiofrequency waves to create precise images of the heart and arteries. It provides comprehensive information about cardiac anatomy, function, perfusion, and tissue characterization without ionizing radiation.IndicationsCMRI diagnoses various heart conditions, including tissue damage from heart attacks, ischemic heart disease, myocarditis, aortic issues (tears, aneurysms,...

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相关实验视频

Updated: Jun 30, 2026

A Murine Model of Stent Implantation in the Carotid Artery for the Study of Restenosis
04:30

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Published on: May 14, 2013

通过使用新的金属磁共振成像支架的标准磁共振血管造影来实现无人工物支架内光的可视化.

Arno Buecker1, Elmar Spuentrup, Alexander Ruebben

  • 1Clinic of Diagnostic Radiology, University of Technology Aachen, Germany. buecker@rad.rwth-aachen.de

Circulation
|April 17, 2002
PubMed
概括

新的磁共振成像 (MRI) 支架消除了人造物质,使动脉支架光和流动的清晰可视化使用MRI血管学. 这一突破改善了金属支架患者的成像.

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Ferromagnetic Bare Metal Stent for Endothelial Cell Capture and Retention
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Last Updated: Jun 30, 2026

A Murine Model of Stent Implantation in the Carotid Artery for the Study of Restenosis
04:30

A Murine Model of Stent Implantation in the Carotid Artery for the Study of Restenosis

Published on: May 14, 2013

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Published on: September 18, 2015

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科学领域:

  • 生物医学工程 生物医学工程
  • 医疗成像医学成像
  • 心血管器械 心血管器械

背景情况:

  • 传统上,金属支架会在MRI上产生物体,阻碍支架光线的可视化.
  • 现有的MRI血管造影技术受到金属支架的灵敏度和射频器件的限制.

研究的目的:

  • 评估一种新的,专用脏MRI支架,用于对支架光体的无工件可视化.
  • 在体外和猪模型中评估新的MRI支架的性能.

主要方法:

  • 可气球扩展的阿共振脏MRI支架的原型在体外测试并植入猪脏动脉中.
  • 图像技术包括相对比和对比增强的T1加权梯度回声序列.
  • 两名研究人员在体外和体内图像上评估了人工物可见性.

主要成果:

  • 在体外或体外图像上没有检测到任何工件,无论成像序列或支架方向如何.
  • 新的脏MRI支架允许对支架光线的无工件可视化.
  • 阶段对比血管造影和流量测量成功地在支架脏动脉中进行.

结论:

  • 完全MRI兼容的MRI支架可方便对支架光线进行无工件可视化.
  • 这些新型支架能够实现精确的相位对比和对比增强的T1加权血管学.
  • 该技术支持可靠的相对比流量测量在脏动脉支架的脏动脉.