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This is a Human Clinical Trial study.

September 17, 2025

Phase-Based R2 Mapping for Single Breath-Hold Whole-Liver Iron Quantification : Clinical Validation

Key Points

PB-R2 mapping provides rapid and accurate liver iron quantification, enhancing patient comfort during MRI exams.
PB-R2 mapping demonstrated good agreement with traditional methods across a broad range of iron concentrations.
The technique uses RF phase-modulated 3D GRE imaging tested at both 1.5T and 3.0T MRI for reliable measurements.
The study highlights the potential of PB-R2 mapping to improve the assessment of liver iron overload while addressing fat bias.

Abstract

Motivation: Liver iron overload can cause serious complications; accurate assessment is essential. Current R2 mapping techniques are limited by long scan times and fat-induced bias. Goal(s): To validate a rapid phase-based (PB) R2 mapping method for whole-liver iron quantification by comparing it with conventional methods, and to understand fat bias through simulations. Approach: PB-R2 mapping using RF phase-modulated 3D GRE imaging was tested in patients with iron overload at 1.5T and 3.0T MRI. Results: PB-R2 mapping showed good agreement with reference methods over a wide range of iron concentrations and excellent repeatability. Impact: PB-R2 mapping enables rapid, accurate whole-liver iron quantification within a single breath-hold, enhancing clinical efficiency and patient comfort. It may improve iron overload assessment and inspire further research to address fat bias in R2 mapping.

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Phase-Based R2 Mapping for Single Breath-Hold Whole-Liver Iron Quantification : Clinical Validation

Key Points

Abstract

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