Sodium MRI in Pediatric Brain Tumors.

Area of Science:

• Biomedical Imaging
• Nuclear Magnetic Resonance Spectroscopy

Background:

• Direct sodium MRI (²³Na-MRI) utilizes ²³Na nucleus spin for imaging, distinct from conventional ¹H-MRI.
• Despite lower concentrations than ¹H, technological progress enables in vivo human ²³Na-MRI.
• ²³Na-MRI provides physiological insights beyond conventional MRI, showing promise for clinical applications.

Purpose of the Study:

• To review technological advancements in pediatric brain ²³Na-MRI.
• To present imaging approaches for quantifying sodium concentrations in the pediatric brain.
• To highlight the utility of ²³Na-MRI in assessing central nervous system pathologies, particularly pediatric brain tumors.

Main Methods:

• Review of technological advancements in pulse sequences and reconstruction methods for ²³Na-MRI.
• Discussion of strategies to overcome challenges like short tissue T2 values in the pediatric brain.
• Detailed description of imaging approaches for quantifying sodium concentrations.

Main Results:

• Technological improvements facilitate ²³Na-MRI in the pediatric brain, despite inherent challenges.
• ²³Na-MRI can quantify sodium concentrations, revealing elevated levels in tumors due to cellular changes.
• Pathological sodium concentration changes are linked to cell integrity, viability, and homeostasis anomalies.

Conclusions:

• ²³Na-MRI is a valuable noninvasive tool for assessing biochemical and physiological cellular changes.
• Quantification of sodium concentrations in the pediatric brain via ²³Na-MRI aids in diagnosing CNS pathologies.
• ²³Na-MRI shows significant potential for evaluating pediatric brain tumors and other central nervous system conditions.