相关实验视频

Updated: Jul 9, 2025

In Vivo Quantitative Assessment of Myocardial Structure, Function, Perfusion and Viability Using Cardiac Micro-computed Tomography

In Vivo Quantitative Assessment of Myocardial Structure, Function, Perfusion and Viability Using Cardiac Micro-computed Tomography

Published on: February 16, 2016

血液池MRI评估心肌小血管微血管反应性的评估

Sadi Loai^1,2, Beiping Qiang³, Michael A Laflamme^3,4,5

¹Institute of Biomedical Engineering, University of Toronto, Toronto, ON, Canada.

Frontiers in cardiovascular medicine

|November 29, 2023

概括

血液池MRI有效地可视化了心脏的微血管变化. 雌性大鼠比雄性大鼠表现出更大的血管扩张到超,这表明肌肉心脏反应的性别相关差异.

科学领域:

心血管成像 - 心血管成像
生理学生理学生理学
生物医学工程生物医学工程

背景情况:

评估心肌微血管功能对于了解心脏健康和疾病至关重要.
使用血液氧化的传统方法对血液体积变化缺乏特异性.
一种新的血液池磁共振成像 (MRI) 方法为精确的血管调节评估提供了潜力.

研究的目的:

适应和应用血液池MRI技术,以对大鼠的心脏血管调节进行成像.
调查这种MRI方法在检测微血管反应方面的特异性.
探索心肌血管调节中的潜在的与性别相关的差异.

主要方法:

健康的雄性和雌性Sprague Dawley大鼠在诺莫克西亚和高头症下接受了MRI扫描.
一种血池对比剂 (Ablavar) 被静脉注射.
获得了前对比T1图和3D CINE序列,并进行了侵入性激光多普勒流量计以验证.

主要成果:

在T1地图中可视化了肌肉心脏微血管扩张在超时和收缩在normoxia时.
雌性大鼠在超 (血管扩张) 期间显着减少了心肌T1的20%.
男性在高头症期间没有显著的T1变化,但在恢复正常时,两性都表现出血管收缩.

结论:

血液池MRI是评估心肌微循环血管调节的敏感和特定工具.
在健康的心肌对高皮刺激的反应中存在与性别相关的显著差异.

关键词:

血液池成像成像血液池成像心灵的心灵心灵的心灵心灵的心灵过度头皮的情况.微血管功能微血管功能血管调节是一种血管调节.

更多相关视频

Oxygenation-sensitive Cardiac MRI with Vasoactive Breathing Maneuvers for the Non-invasive Assessment of Coronary Microvascular Dysfunction

Oxygenation-sensitive Cardiac MRI with Vasoactive Breathing Maneuvers for the Non-invasive Assessment of Coronary Microvascular Dysfunction

Published on: August 17, 2022

Noninvasive Assessment of Cardiac Abnormalities in Experimental Autoimmune Myocarditis by Magnetic Resonance Microscopy Imaging in the Mouse

Noninvasive Assessment of Cardiac Abnormalities in Experimental Autoimmune Myocarditis by Magnetic Resonance Microscopy Imaging in the Mouse

Published on: June 20, 2014

相关概念视频

Magnetic Resonance Imaging

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...