Tilted-CAIPI for highly accelerated distortion-free EPI with point spread function (PSF) encoding.

ABSTRACT:

Purpose

To develop a method for fast distortion- and blurring-free imaging.

Theory

EPI with point-spread-function (PSF) mapping can achieve distortion- and blurring-free imaging at a cost of long acquisition time. In this study, an acquisition/reconstruction technique, termed "tilted-CAIPI," is proposed to achieve >20× acceleration for PSF-EPI. The proposed method systematically optimized the k-space sampling trajectory with B₀ -inhomogeneity-informed reconstruction, to exploit the inherent signal correlation in PSF-EPI and take full advantage of coil sensitivity. Susceptibility-induced phase accumulation is regarded as an additional encoding that is estimated by calibration data and integrated into reconstruction. Self-navigated phase correction was developed to

SUBMITTER: Dong Z 

PROVIDER: S-EPMC6258292 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature