We propose a new plug-and-play priors (PnP) based MR image reconstruction method that systematically enforces data consistency while also exploiting deep-learning priors. Our prior is specified through a convolutional neural network (CNN) trained without any artifact-free ground truth to remove undersampling artifacts from MR images. The results on reconstructing free-breathing MRI data into ten respiratory phases show that the method can form high-quality 4D images from severely undersampled measurements corresponding to acquisitions of about 1 and 2 minutes in length. The results also highlight the competitive performance of the method compared to several popular alternatives, including the TGV regularization and traditional UNet3D.
@article{arxiv.2204.04771,
title = {Image Reconstruction for MRI using Deep CNN Priors Trained without Groundtruth},
author = {Weijie Gan and Cihat Eldeniz and Jiaming Liu and Sihao Chen and Hongyu An and Ulugbek S. Kamilov},
journal= {arXiv preprint arXiv:2204.04771},
year = {2022}
}