Compressed sensing acceleration of radial 3-D alternating Look-Locker T 1 mapping.

ABSTRACT:

Purpose

To determine how various compressed sensing (CS) models can accelerate alternating Look-Locker T1$$ {T}_1 $$ mapping.

Methods

An alternating Look-Locker acquisition was retrospectively accelerated by factors of 1-12. The data was reconstructed into 12 images with multiple CS models, which utilized combinations of spatial total variation, locally low-rank regularization, and subspace constraints. Complex non-linear least squares signal fitting was performed to obtain the T1$$ {T}_1 $$ maps. The accelerated T1$$ {T}_1 $$ maps were compared against the T1$$ {T}_1 $$ map of a full data reference reconstruction.

Results

A subspace-constrained reconstruction model with spatial total variation and locally low-rank regularization outperformed all other models as measu

SUBMITTER: Aarnio A 

PROVIDER: S-EPMC12393196 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature