T₂ shuffling: Sharp, multicontrast, volumetric fast spin-echo imaging.

ABSTRACT:

Purpose

A new acquisition and reconstruction method called T₂ Shuffling is presented for volumetric fast spin-echo (three-dimensional [3D] FSE) imaging. T₂ Shuffling reduces blurring and recovers many images at multiple T₂ contrasts from a single acquisition at clinically feasible scan times (6-7 min).

Theory and methods

The parallel imaging forward model is modified to account for temporal signal relaxation during the echo train. Scan efficiency is improved by acquiring data during the transient signal decay and by increasing echo train lengths without loss in signal-to-noise ratio (SNR). By (1) randomly shuffling the phase encode view ordering, (2) constraining the temporal signal evolution to a low-dimensional subspace, and (3) promoting s

SUBMITTER: Tamir JI 

PROVIDER: S-EPMC4990508 | biostudies-literature | 2017 Jan

REPOSITORIES: biostudies-literature