Iron deposition quantification: Applications in the brain and liver

Area of Science:

• Medical Imaging
• Neuroimaging
• Hepatology

Background:

• Iron accumulation in the brain and liver is linked to various neurological and organ diseases.
• Aging naturally increases iron levels, but certain diseases cause excessive iron buildup.
• Accurate iron quantification is crucial for assessing disease severity and monitoring treatment.

Purpose of the Study:

• To provide an overview of current Magnetic Resonance Imaging (MRI)-based methods for iron quantification.
• To specifically address iron quantification in the brain and liver.
• To compare the efficacy of different MRI techniques for iron measurement in these organs.

Main Methods:

• Review of established MRI techniques for iron quantification.
• Methods discussed include signal intensity ratio, R2, R2*, R2', phase, susceptibility weighted imaging, and quantitative susceptibility mapping (QSM).
• Focus on noninvasive, three-dimensional imaging and quantification of iron within specific volumes.

Main Results:

• R2 and R2* are currently the preferred methods for imaging iron in the liver.
• Quantitative Susceptibility Mapping (QSM) has emerged as the preferred approach for imaging iron in the brain.
• Various MRI methods offer different capabilities for assessing iron-related pathologies.

Conclusions:

• MRI provides a noninvasive means to quantify iron in the brain and liver.
• Specific MRI techniques are better suited for different organs: QSM for the brain and R2/R2* for the liver.
• Accurate iron quantification using MRI aids in diagnosing, monitoring, and managing iron-related diseases.