Correlated spectroscopic imaging of calf muscle in three spatial dimensions using group sparse reconstruction of undersampled single and multichannel data.

ABSTRACT:

Purpose

To implement a 5D (three spatial + two spectral) correlated spectroscopic imaging sequence for application to human calf.

Theory and methods

Nonuniform sampling was applied across the two phase encoded dimensions and the indirect spectral dimension of an echo planar-correlated spectroscopic imaging sequence. Reconstruction was applied that minimized the group sparse mixed ℓ2,1-norm of the data. Multichannel data were compressed using a sensitivity map-based approach with a spatially dependent transform matrix and utilized the self-sparsity of the individual coil images to simplify the reconstruction.

Results

Single channel data with 8× and 16× undersampling are shown in the calf of a diabetic patient. A 15-channel scan with 12× undersampling of a healthy volun

SUBMITTER: Wilson NE 

PROVIDER: S-EPMC4619112 | biostudies-literature | 2015 Nov

REPOSITORIES: biostudies-literature