人类大脑中的快速组织-中枢神经液水交换通过磁化转移间接旋转标签揭示
Yihan Wu1, Kexin Wang1, Licheng Ju2,3
1Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland, USA.
Magnetic resonance in medicine
|February 10, 2026
概括
磁化转移间接旋转标记 (MISL) MRI量化了脑组织-中枢神经液的水交换,揭示了它在周围血管空间和疾病中的作用. 这种技术提供了对淋巴功能和病理学中改变的水动态的见解.
科学领域:
- 神经成像是一种神经成像.
- 生物物理学的生物物理.
- 医学物理 医学物理
背景情况:
- 大脑组织和脑脊液 (CSF) 之间的水交换对于废物清除和平衡至关重要.
- 周血管空间 (PVS) 是这种交换的关键途径,可能与淋巴功能有关.
- 非侵入性地量化组织-CSF水交换仍然是一个挑战.
研究的目的:
- 应用磁化转移间接旋转标记 (MISL) MRI用于量化人类大脑组织-CSF水交换.
- 评估MISL在评估PVS内部组织-CSF交换中的实用性.
- 在病理条件下描述改变的水交换动态.
主要方法:
- 在3T的MISLMRI中使用了非共振磁化转移来标记帕伦基马水.
- 长TE 3D-TSE读数捕获了CSF交换,抑制了对酶体信号.
- 基于Atlas的细分使得在健康受试者和脑瘤患者中实现了CSF区域特定的量化.
主要成果:
- MISL表现出广泛的,异质的组织-CSF交换,在PVS和状附近最强.
- 组织到中枢神经的流量 (TCF) 估计为100-300毫升/100毫升/分钟,在PVS中MISL信号 (~8.4%) 较高.
- 观察到与年龄相关的TCF下降,并且在瘤患者中检测到水交换升高,即使没有明显的FLAIR超强度.
结论:
- MISL使组织-CSF交换具有高灵敏度和空间分辨率的强大,非侵入性映射成为可能.
- MISL为PVS组织-CSF交换提供了一个独特的窗口,可能反映了淋巴功能.
- 这种技术可以在疾病状态下表征改变的水交换.
关键词:
大脑脊髓液 (CSF) 是一种edemema edemema 胀 胀 在 胀 胀 在淋巴系统 淋巴系统磁化转移 (MT) 是一个磁化转移间接旋转标签 (MISL) 是一种方法.周周血管空间 (PVS)组织-CSF水交换瘤是一个瘤.更多相关视频
11:44Spin Saturation Transfer Difference NMR SSTD NMR: A New Tool to Obtain Kinetic Parameters of Chemical Exchange Processes
Published on: November 12, 2016
18.6K
04:54Using a Combination of Indirect Calorimetry, Infrared Thermography, and Blood Glucose Levels to Measure Brown Adipose Tissue Thermogenesis in Humans
Published on: June 2, 2023
2.0K
相关概念视频
Gas Exchange and Transport
77.1K
Gas exchange, the intake of molecular oxygen (O2) from the environment and the outflow of carbon dioxide (CO2) into the environment, is necessary for cellular function. Gas exchange during respiration occurs largely via the movement of gas molecules along pressure gradients. Gas travels from areas of higher partial pressure to areas of lower partial pressure. In mammals, gas exchange occurs in the alveoli of the lungs, which are adjacent to capillaries and share a membrane with them.
77.1K
Social Exchange Theory
40.8K
We have discussed why we form relationships, what attracts us to others, and different types of love. But what determines whether we are satisfied with and stay in a relationship? One theory that provides an explanation is social exchange theory. According to social exchange theory, we act as naïve economists in keeping a tally of the ratio of costs and benefits of forming and maintaining a relationship with others (Rusbult & Van Lange, 2003).
40.8K
Role of Water in Human Biology
14.2K
Water is the one of the most significant components of the human body; it plays a crucial role in several physiological activities because of its unique physicochemical properties. Importantly, it helps to regulate body temperature and is the chief component of several body fluids.
Water's Solvent Properties
Since water is a polar molecule with slightly positive and slightly negative charges, ions and polar molecules can readily dissolve in it. Therefore, it is referred to as a solvent, a...
Water's Solvent Properties
Since water is a polar molecule with slightly positive and slightly negative charges, ions and polar molecules can readily dissolve in it. Therefore, it is referred to as a solvent, a...
14.2K
Colors and Magnetism
14.2K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
14.2K
NMR Spectroscopy: Spin–Spin Coupling
3.3K
The spin state of an NMR-active nucleus can have a slight effect on its immediate electronic environment. This effect propagates through the intervening bonds and affects the electronic environments of NMR-active nuclei up to three bonds away; occasionally, even farther. This phenomenon is called spin–spin coupling or J-coupling. Coupling interactions are mutual and result in small changes in the absorption frequencies of both nuclei involved. While nuclei of the same element are involved...
3.3K
Spin–Spin Coupling: One-Bond Coupling
1.5K
Coupling interactions are strongest between NMR-active nuclei bonded to each other, where spin information can be transmitted directly through the pair of bonding electrons. While nuclei polarize their electrons to the opposite spins, the bonding electron pair has opposite spins. Configurations with antiparallel nuclear spins are expected to be lower in energy. When coupling makes antiparallel states more favorable, J is considered to have a positive value. The one-bond coupling constant, 1J,...
1.5K
