Accelerated high-bandwidth MR spectroscopic imaging using compressed sensing.

ABSTRACT:

Purpose

To develop a compressed sensing (CS) acceleration method with a high spectral bandwidth exploiting the spatial-spectral sparsity of MR spectroscopic imaging (MRSI).

Methods

Accelerations were achieved using blip gradients during the readout to perform nonoverlapped and stochastically delayed random walks in kx -ky -t space, combined with block-Hankel matrix completion for efficient reconstruction. Both retrospective and prospective CS accelerations were applied to (13) C MRSI experiments, including in vivo rodent brain and liver studies with administrations of hyperpolarized [1-(13) C] pyruvate at 7.0 Tesla (T) and [2-(13) C] dihydroxyacetone at 3.0 T, respectively.

Results

In retrospective undersampling experiments using in vivo 7.0 T data, the proposed metho

SUBMITTER: Cao P 

PROVIDER: S-EPMC4945498 | biostudies-literature | 2016 Aug

REPOSITORIES: biostudies-literature