相关实验视频

Updated: Sep 10, 2025

Diffusion Tensor Magnetic Resonance Imaging in the Analysis of Neurodegenerative Diseases

Diffusion Tensor Magnetic Resonance Imaging in the Analysis of Neurodegenerative Diseases

Published on: July 28, 2013

用扩散MRI对大脑和脊髓中的神经元和 soma组织进行表征

Kurt G Schilling^1,2, Marco Palombo^3,4, Atlee A Witt¹

¹Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, TN, United States.

Imaging neuroscience (Cambridge, Mass.)

|August 22, 2025

概括

这项研究提出了一种新的扩散核磁共振 (MRI) 方法, 这种方法可以进行全面的中枢神经系统 (CNS) 分析和潜在的生物标志物发现.

科学领域:

神经成像
生物物理
放射学

背景情况:

中枢神经系统包括大脑和脊髓,对各种功能至关重要.
目前的扩散MRI (dMRI) 研究通常单独检查大脑或脊髓.
对中枢神经系统的微观结构进行非侵入性表征对于理解神经疾病至关重要.

研究的目的:

开发和评估临床上可行的dMRI协议,用于同时对大脑和脊髓微观结构进行成像.
评估标准模型成像 (SMI) 和索马和神经密度成像 (SANDI) 在脊髓和神经轴上的可行性.
为整个中枢神经系统建立一个协调的成像方法.

主要方法:

实施3TdMRI协议,使得扩散张力成像 (DTI),SMI和SANDI成为可能.
同时获取大脑和脊髓数据.
与DTI相比,SMI和SANDI指标的图像质量,可重现性和对比度的评估.

主要成果:

即使在高扩散权重下,dMRI协议也实现了高图像质量.
SMI和SANDI指标显示可复制性与DTI相比,在脊髓中有一些例外.
在中枢神经系统内和中枢神经系统白质和灰质区域之间观察到生物可信的对比.
脊髓成像存在挑战,包括由于部分体积效应和预处理而降低的可复制性和对比度.

结论:

开发的dMRI协议提供了一种协调的方法,用于同时对大脑和脊髓进行微结构成像.
这种方法可以在整个神经轴上研究中枢神经系统病理和结构完整性的生物标志物.
需要进一步的研究来解决脊髓成像方面的挑战,以改善临床应用.

关键词:

大脑扩散核磁共振在体内微观结构神经质其他脊髓

更多相关视频

Diffusion Tensor Magnetic Resonance Imaging in Chronic Spinal Cord Compression

Diffusion Tensor Magnetic Resonance Imaging in Chronic Spinal Cord Compression

Published on: May 7, 2019

Co-analysis of Brain Structure and Function using fMRI and Diffusion-weighted Imaging

Co-analysis of Brain Structure and Function using fMRI and Diffusion-weighted Imaging

Published on: November 8, 2012

相关概念视频

Neuron Structure

Neuron Structure

Neurons are the main type of cell in the nervous system that generate and transmit electrochemical signals. They primarily communicate with each other using neurotransmitters at specific junctions called synapses. Neurons come in many shapes that often relate to their function, but most share three main structures: an axon and dendrites that extend out from a cell body.
Structure and Function of Neurons
The neuronal cell body—the soma— houses the nucleus and organelles vital to...

Spinal Cord: Cross-sectional Anatomy

Spinal Cord: Cross-sectional Anatomy

The cross-sectional anatomy of the spinal cord offers a detailed view of its complex structure and function within the central nervous system. At the core of the spinal cord lies the gray matter, characterized by its butterfly or "H"-shaped appearance in cross-section. This central region is enveloped by white matter, with the overall structure divided into symmetrical halves by the dorsal median sulcus and the ventral median fissure.
Gray Matter and its Components
Central to the gray matter is...

Neurons: The Cell Body and the Dendrites

Neurons: The Cell Body and the Dendrites

A typical nerve cell comprises three main components: the cell body, dendrites, and the axon. The cell body, also known as the soma or perikaryon, serves as the central biosynthetic hub housing a nucleus surrounded by cytoplasm containing organelles commonly found in most cells. Notably, Nissl bodies, clusters of the rough endoplasmic reticulum and free ribosomes responsible for protein synthesis, are distinctive features of the neuronal cell body. As neurons age, aggregates of a brown pigment...