Journal article

A continuum of T-2(*) components: Flexible fast fraction mapping in sodium MRI

Warda Syeda, Yasmin Blunck, Scott Kolbe, Jon O Cleary, Leigh A Johnston

MAGNETIC RESONANCE IN MEDICINE | WILEY | Published : 2019

Abstract

PURPOSE: Parameter mapping in sodium MRI data is challenging due to inherently low SNR and spatial resolution, prompting the need to employ robust models and estimation techniques. This work aims to develop a continuum model of sodium T 2 * -decay to overcome the limitations of the commonly employed bi-exponential models. Estimates of mean T 2 * -decay and fast component fraction in tissue are emergent from the inferred continuum model. METHODS: A closed-form continuum model was derived assuming a gamma distribution of T 2 * components. Sodium MRI was performed on four healthy human subjects and a phantom consisting of closely packed vials filled with an aqueous solution of varying sodium..

View full abstract