Combining multiband slice selection with consistent k-t-space EPSI for accelerated spectral imaging.

ABSTRACT:

Purpose

To design and implement a multislice MRSI method for fast spectroscopic imaging, using a modified version of echo planar spectroscopic imaging (EPSI) that offers higher spectral width and/or shorter scan time.

Methods

Echo planar spectroscopic imaging suffers from inconsistencies between readout lines acquired with gradients of opposite signs, which has typically been addressed by reconstructing the "positive" and "negative" data sets separately and averaging the two. Nevertheless, consistency between the readout lines of each phase encode can be achieved by interposing the EPSI readouts with alternating "blipped" phase-encode gradients. This method exchanges inconsistencies along the temporal dimension with inconsistencies along the phase-encode dimension, which are

SUBMITTER: Schmidt R 

PROVIDER: S-EPMC6559850 | biostudies-literature | 2019 Sep

REPOSITORIES: biostudies-literature