A decay-modeled compressed sensing reconstruction approach for non-Cartesian hyperpolarized ¹²⁹Xe MRI.

ABSTRACT:

Purpose

Hyperpolarized ¹²⁹Xe MRI benefits from non-Cartesian acquisitions that sample k-space efficiently and rapidly. However, their reconstructions are complex and burdened by decay processes unique to hyperpolarized gas. Currently used gridded reconstructions are prone to artifacts caused by magnetization decay and are ill-suited for undersampling. We present a compressed sensing (CS) reconstruction approach that incorporates magnetization decay in the forward model, thereby producing images with increased sharpness and contrast, even in undersampled data.

Methods

Radio-frequency, T₁, and T2*$$ {\mathrm{T}}_2^{\ast } $$ decay processes were incorporated into the forward model and solved using iterative methods including CS. The decay-modeled reconstr

SUBMITTER: Plummer JW 

PROVIDER: S-EPMC11262966 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature