Free-breathing high isotropic resolution quantitative susceptibility mapping (QSM) of liver using 3D multi-echo UTE cones acquisition and respiratory motion-resolved image reconstruction.

ABSTRACT:

Purpose

To enable free-breathing and high isotropic resolution liver quantitative susceptibility mapping (QSM) using 3D multi-echo UTE cones acquisition and respiratory motion-resolved image reconstruction.

Methods

Using 3D multi-echo UTE cones MRI, a respiratory motion was estimated from the k-space center of the imaging data. After sorting the k-space data with estimated motion, respiratory motion state-resolved reconstruction was performed for multi-echo data followed by nonlinear least-squares fitting for proton density fat fraction (PDFF), R2*$$ {\mathrm{R}}_2^{\ast } $$ , and fat-corrected B₀ field maps. PDFF and B₀ field maps were subsequently used for QSM reconstruction. The proposed method was compared with motion-averaged (gridding) reconstruc

SUBMITTER: Kang M 

PROVIDER: S-EPMC10529485 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature