Deep learning-based MRI reconstruction models have achieved superior performance these days. Most recently, diffusion models have shown remarkable performance in image generation, in-painting, super-resolution, image editing and more. As a generalized diffusion model, cold diffusion further broadens the scope and considers models built around arbitrary image transformations such as blurring, down-sampling, etc. In this paper, we propose a k-space cold diffusion model that performs image degradation and restoration in k-space without the need for Gaussian noise. We provide comparisons with multiple deep learning-based MRI reconstruction models and perform tests on a well-known large open-source MRI dataset. Our results show that this novel way of performing degradation can generate high-quality reconstruction images for accelerated MRI.
@article{arxiv.2311.10162,
title = {Learning to Reconstruct Accelerated MRI Through K-space Cold Diffusion without Noise},
author = {Guoyao Shen and Mengyu Li and Chad W. Farris and Stephan Anderson and Xin Zhang},
journal= {arXiv preprint arXiv:2311.10162},
year = {2024}
}