Sodium Mri
Sodium Mri - Related Videos
03:16
Using 23Na Magnetic Resonance Imaging to Measure Sodium in Muscle Tissues
0 Views •
2025
Source:Lale Ertuglu1, Michael Pridmore2, Rachelle Crescenzi2,3, Annet Kirabo41Division of Nephrology and Hypertension, Vanderbilt University Medical Center.2Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center.3Department of Biomedical Engineering, Vanderbilt University.4Division of Clinical Pharmacology, Department of Medicine, Vanderbilt University Medical Center.This video demonstrates the quantification of sodium content in human tissues using sodium...
06:58
Synthesis of an In vivo MRI-detectable Apoptosis Probe
0 Views •
Cited by 3 •
2012
Early detection of apoptosis may identify at-risk cell populations in a variety of diseases. Here we demonstrate a method to link an early apoptosis-detection protein (Annexin V) to a MRI-detectable iron oxide nanoparticle (SPIO). This method may be extended to other proteins of interest to generate MRI-detectable molecular imaging probes.
06:06
Optogenetic Functional MRI
0 Views •
Cited by 15 •
2016
This protocol describes the steps and data analysis required to successfully perform optogenetic functional magnetic resonance imaging (ofMRI). ofMRI is a novel technique that combines high-field fMRI readout with optogenetic stimulation, allowing for cell type-specific mapping of functional neural circuits and their dynamics across the whole living brain.
08:20
MRI-guided dmPFC-rTMS as a Treatment for Treatment-resistant Major Depressive Disorder
0 Views •
Cited by 31 •
2015
Here we outline the procedure for MRI-guided repetitive transcranial magnetic stimulation to the dorsomedial prefrontal cortex as an experimental treatment for major depressive disorder.
01:26
Regulation of Sodium and Potassium
0 Views •
2024
The regulation of sodium and potassium ion concentrations in the human body is a complex process governed primarily by hormones such as aldosterone, antidiuretic hormone (ADH), and atrial natriuretic peptide (ANP). Sodium Regulation Sodium ions make up approximately 90% of extracellular cations, with a normal blood plasma concentration of 136–148 mEq/L. A decrease in blood volume and pressure triggers the release of renin from granular cells in the juxtaglomerular complex (JGC), primarily in...
FAQs
Sodium MRI signal depends on both the amount of sodium present and how its nuclei relax after radiofrequency excitation. These properties differ from those of water protons, so signal intensity cannot be interpreted as a simple anatomical image. Acquisition and reconstruction must be tailored to sodium behavior, allowing maps to reflect physiological variation rather than only tissue structure.
Dedicated coils are needed because the sodium signal has different characteristics from the water-proton signal targeted by conventional MRI. The acquisition must capture the sodium signal, while reconstruction converts the measurements into interpretable sodium maps. These components determine whether spatial distribution and physiological differences are represented reliably, making hardware and processing integral to the measurement rather than optional accessories.
Changes in tissue sodium are best treated as indicators with several possible biological sources. They may reflect altered cellular integrity, expansion of extracellular volume, edema, or inflammatory activity. Because these processes can coexist, a sodium change does not by itself identify which mechanism dominates. Researchers therefore interpret the maps as physiological context for tissue dysfunction, alongside anatomical findings and other study information.
A typical acquisition begins with radiofrequency pulses that excite naturally occurring sodium-23 nuclei in the magnetic field. Specialized coils then detect the resulting signal, and dedicated reconstruction methods transform those measurements into sodium-distribution maps. The sequence links excitation, detection, and computation; each stage contributes to the physiological information available for evaluating tissue changes.
In immunology and infection research, the method can help characterize tissue dysfunction associated with disease-related changes. Investigators can examine whether sodium distribution changes in patterns consistent with altered cellular integrity, extracellular volume, edema, or inflammatory activity. Repeated imaging can also support monitoring over time, so studies can track physiological change rather than relying only on anatomy.
Sodium MRI is particularly informative when anatomical images alone do not provide the full physiological picture of a tissue. Conventional proton MRI supplies anatomical context, while sodium maps can add information related to cellular integrity, extracellular volume, edema, and inflammatory activity. Combining both perspectives helps researchers relate visible structure to tissue dysfunction and evaluate disease-related changes more comprehensively.