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相关概念视频

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DefinitionRenal angiography, also known as renal arteriography, is an imaging technique used to obtain a comprehensive view of blood flow and the vascular structure of blood vessels in the kidneys and surrounding areas.PurposeRenal angiography detects blood vessel abnormalities in the kidneys, such as aneurysms, stenosis, thrombosis, vascular tumors, and renal artery stenosis. It evaluates kidney function and guides interventional treatments like angioplasty or stent placement.Pre-Procedure...
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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...
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相关实验视频

Updated: Mar 9, 2026

Author Spotlight: Noninvasive Cerebral Blood Flow Determination in Human Functional Brain Region for Diagnosis of Neurological Disorders
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调制导向EN编码 (MOGEN) 方案用于船舶编码的动脉旋转标签.

Hongwei Li1, Thomas W Okell2, Joseph G Woods2

  • 1Institute of Science and Technology for Brain-Inspired Intelligence, Fudan University, Shanghai, China.

Magnetic resonance in medicine
|March 7, 2026
PubMed
概括

一个新的调制导向EN编码 (MOGEN) 方案显著提高了血管编码动脉旋转标签 (VEASL) 的信号噪声比 (SNR) 效率. 这一进步提高了脑血管疾病的可视化,并使得更快,更强大的成像.

关键词:
在SNR的效率方面,SNR的效率是:编码方案的编码方案.血管区域是血管区域.血管编码的动脉旋转标签 (VEASL)选择性的船只-选择性的船只

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科学领域:

  • 神经成像是一种神经成像.
  • 血管生物学 血管生物学
  • 医学物理 医学物理

背景情况:

  • 血管编码动脉旋转标签 (VEASL) 对于脑血管疾病的非对比成像至关重要.
  • 目前的VEASL方法存在低效的信号噪声比 (SNR),限制了其诊断和监测能力.

研究的目的:

  • 为VEASL开发一种新的,SNR高效的编码方案.
  • 提高VEASL在各种临床场景中的稳定性和适用性.

主要方法:

  • 开发了使用空间调制配置文件的调制指导EN编码 (MOGEN) 方案.
  • 通过模拟,幻影研究以及人类志愿者和患者扫描验证了MOGEN.

主要成果:

  • 与现有方法相比,MOGEN 证明了理论上更高的 SNR 效率.
  • 在体内扫描显示了~15%的SNR改善和更强大的血管解码.
  • 在莫亚莫亚病患者中可靠地可视化了附带途径,缩短了扫描时间 (约. 5分钟为六个动脉).
  • 增强了单动脉选择性,并为超高场VEASL提供了方便的非共振校正.

结论:

  • MOGEN显著提高了SNR的效率,稳定性和VEASL的可用性.
  • 提供灵活的空间调制,考虑容器大小,以及简单的非共振校正.
  • 代表了VEASL在脑血管疾病诊断和监测中的应用的重大改进.