相关实验视频

Updated: Jul 2, 2025

Standardized Data Acquisition for Neuromelanin-Sensitive Magnetic Resonance Imaging of the Substantia Nigra

Standardized Data Acquisition for Neuromelanin-Sensitive Magnetic Resonance Imaging of the Substantia Nigra

Published on: September 8, 2021

基于反向恢复的3D磁化转移和光谱预和神经黑色素成像技术的比较

Midori Kusama¹, Yukio Kimura¹, Masami Yoneyama²

¹Department of Radiology, National Center of Neurology and Psychiatry, Kodaira, Tokyo, Japan.

Magnetic resonance in medical sciences : MRMS : an official journal of Japan Society of Magnetic Resonance in Medicine

|February 21, 2024

概括

与反向恢复 (SPIR) 成像的光谱预和改善了与3D成像中的磁化转移 (MT) 脉冲相比,在黑色物质紧部分 (SNc) 和角质位置 (LC) 中的神经黑色素检测.

科学领域:

神经成像是一种神经成像.
磁共振成像 (MRI) 是一种磁共振成像技术.
神经解剖学是一个神经解剖学.

背景情况:

神经黑色素可视化对于研究神经退行性疾病至关重要.
具有磁化转移 (MT) 脉冲的三维 (3D) 梯度回声 (GRE) 序列通常用于神经黑色素成像.
作为MT脉冲的替代方案,建议使用逆转恢复 (SPIR) 的光谱预和.

研究的目的:

为了优化神经黑色素成像的SPIR参数.
为了比较SPIR与MT脉冲在 substantia nigra pars compacta (SNc) 和 locus coeruleus (LC) 中可视化神经黑色素的有效性.

主要方法:

在30名健康志愿者中使用MT脉冲和SPIR (翻转角度[FA]=19o,22o,25o) 获取神经黑色素图像.
标准化采集时间为5分钟,并调整了板块厚度和采集区域 (MT的脑干,SPIR的整个大脑).
视觉和定量评估SNc和LC对比度和信号与噪声比.

主要成果:

与其他序列相比,具有19o和22o翻转角度的SPIR显示SNC的视觉得分优于其他序列.
翻转角度为22o的SPIR给出了LC的最佳视觉分数.
定量分析显示,与SPIR序列相比,SNc中的MT对比度明显较低.

结论:

与3D成像中的MT脉冲相比,SPIR成像为SNC和LC中神经黑色素检测提供了一种改进的方法.
SPIR为MT脉冲提供了一个可行的替代方案,用于增强神经黑色素可视化.

关键词:

磁化转移的转移方式神经黑色素成像成像是神经黑色素成像.带有反转恢复的光谱预和.三维成像三维成像技术

更多相关视频

The Use of Magnetic Resonance Spectroscopy as a Tool for the Measurement of Bi-hemispheric Transcranial Electric Stimulation Effects on Primary Motor Cortex Metabolism

The Use of Magnetic Resonance Spectroscopy as a Tool for the Measurement of Bi-hemispheric Transcranial Electric Stimulation Effects on Primary Motor Cortex Metabolism

Published on: November 19, 2014

In vivo Imaging of Optic Nerve Fiber Integrity by Contrast-Enhanced MRI in Mice

In vivo Imaging of Optic Nerve Fiber Integrity by Contrast-Enhanced MRI in Mice

Published on: July 22, 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...

Insensitive Nuclei Enhanced by Polarization Transfer (INEPT)

Insensitive Nuclei Enhanced by Polarization Transfer (INEPT)

Insensitive Nuclei Enhanced by Polarization Transfer (INEPT) is an advanced Nuclear Magnetic Resonance (NMR) technique specifically designed to detect and enhance the signals of low-abundance nuclei, such as carbon-13 and nitrogen-15, in small molecules. The fundamental principle behind INEPT is the transfer of polarization from a more abundant and highly polarizable nucleus, typically hydrogen-1, to the low-abundance nucleus of interest. This process effectively boosts the NMR signal of the...