Translator Disclaimer
9 September 2019 Inverse GANs for accelerated MRI reconstruction
Author Affiliations +
Abstract
State-of-the-art algorithms for accelerated magnetic resonance image (MRI) reconstruction are nowadays dominated by deep learning-based techniques. However, the majority of these methods require the respective sampling patterns in training, which limits their application to a specific problem class. We propose an iterative reconstruction approach that incorporates the implicit prior provided by a generative adversarial network (GAN), which learns the probability distribution of uncorrupted MRI data in an off-line step. Since the unsupervised training of the GAN is completely independent of the measurement process, our method is in principle able to address multiple sampling modalities using a single pre-trained model. However, it turns out that the desired target images potentially lie outside the range space of the learned GAN, leading to reconstructions that resemble the target images only at a coarse level of detail. To overcome this issue, we propose a refinement scheme termed GAN prior adaption, that allows for additional adaption of the generating network with respect to the measured data. The proposed method is evaluated on multi-coil knee MRI data for different acceleration factors and compared to a classical as well as a deep learning-based approach showing promising quantitative and qualitative results.
© (2019) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Dominik Narnhofer, Kerstin Hammernik, Florian Knoll, and Thomas Pock "Inverse GANs for accelerated MRI reconstruction", Proc. SPIE 11138, Wavelets and Sparsity XVIII, 111381A (9 September 2019); https://doi.org/10.1117/12.2527753
PROCEEDINGS
12 PAGES


SHARE
Advertisement
Advertisement
Back to Top