Hybrid radial-cones trajectory for accelerated MRI.

ABSTRACT:

Purpose

To design and develop a series of ultrashort echo time k-space sampling schemes, termed radial-cones, which enables high sampling efficiency while maintaining compatibility with parallel imaging and compressed sensing reconstructions.

Theory and methods

Radial-cones is a trajectory that samples three-dimensional (3D) k-space using a single base cone distributed along radial dimensions through a cost function-based optimization. Trajectories were generated for highly undersampled, short readout sampling and compared with 3D radial sampling in point spread function (PSF) analysis, digital and physical phantoms, and initial human volunteers. Parallel imaging reconstructions were evaluated with and without the use of compressed sensing-based regularization.

Results

SUBMITTER: Johnson KM 

PROVIDER: S-EPMC5040626 | biostudies-literature | 2017 Mar

REPOSITORIES: biostudies-literature