Wave-CAIPI for highly accelerated MP-RAGE imaging.

ABSTRACT:

Purpose

To introduce a highly accelerated T1-weighted magnetization-prepared rapid gradient echo (MP-RAGE) acquisition that uses wave-controlled aliasing in parallel imaging (wave-CAIPI) encoding to retain high image quality.

Methods

Significant acceleration of the MP-RAGE sequence is demonstrated using the wave-CAIPI technique. Here, sinusoidal waveforms are used to spread aliasing in all three directions to improve the g-factor. Combined with a rapid (2 s) coil sensitivity acquisition and data-driven trajectory calibration, we propose an online integrated acquisition-reconstruction pipeline for highly efficient MP-RAGE imaging.

Results

The 9-fold accelerated MP-RAGE acquisition can be performed in 71 s, with a maximum and average g-factor of g_max  = 1.27

SUBMITTER: Polak D 

PROVIDER: S-EPMC5563495 | biostudies-literature | 2018 Jan

REPOSITORIES: biostudies-literature