3D MR fingerprinting with accelerated stack-of-spirals and hybrid sliding-window and GRAPPA reconstruction.

ABSTRACT:

Purpose

Whole-brain high-resolution quantitative imaging is extremely encoding intensive, and its rapid and robust acquisition remains a challenge. Here we present a 3D MR fingerprinting (MRF) acquisition with a hybrid sliding-window (SW) and GRAPPA reconstruction strategy to obtain high-resolution T₁, T₂ and proton density (PD) maps with whole brain coverage in a clinically feasible timeframe.

Methods

3D MRF data were acquired using a highly under-sampled stack-of-spirals trajectory with a steady-state precession (FISP) sequence. For data reconstruction, k_x-k_y under-sampling was mitigated using SW combination along the temporal axis. Non-uniform fast Fourier transform (NUFFT) was then applied to create Cartesian k-space data that

SUBMITTER: Liao C 

PROVIDER: S-EPMC6031129 | biostudies-literature | 2017 Nov

REPOSITORIES: biostudies-literature