Active MR k-space Sampling with Reinforcement Learning

Code

• github.com/facebookresearch/active-mri-acquisition
  OfficialIn paperpytorch★ 46
• github.com/facebookresearch/fastMRI
  pytorch★ 1,513

Abstract

Deep learning approaches have recently shown great promise in accelerating magnetic resonance image (MRI) acquisition. The majority of existing work have focused on designing better reconstruction models given a pre-determined acquisition trajectory, ignoring the question of trajectory optimization. In this paper, we focus on learning acquisition trajectories given a fixed image reconstruction model. We formulate the problem as a sequential decision process and propose the use of reinforcement learning to solve it. Experiments on a large scale public MRI dataset of knees show that our proposed models significantly outperform the state-of-the-art in active MRI acquisition, over a large range of acceleration factors.

Tasks

Reproductions