This is a reference implementation for the following work:
[MICCAI'19] k-t NEXT: Dynamic MR Image Reconstruction Exploiting Spatio-Temporal Correlations.
Paper link: https://arxiv.org/abs/1907.09425
[MRM'21] Complementary Time-Frequency Domain Network for Dynamic Parallel MR Image Reconstruction.
Paper link: https://arxiv.org/abs/2012.11974
Dynamic magnetic resonance imaging (MRI) exhibits high correlations in k-space and time. In order to accelerate the dynamic MR imaging and to exploit k-t correlations from highly undersampled data, here we develop novel deep learning based approaches for dynamic MR image reconstruction in both single-coil and multi-coil acquisition settings. The developed approaches are termed k-t NEXT (k-t NEtwork with X-f Transform) for sinlge-coil setting and CTFNet (Complementary Time-Frequency domain Network) for multi-coil setting. The networks are able to effectively capture useful information and jointly exploit spatio-temporal correlations from both complementary domains (x-f and image domains).
This repository contains the implementation of k-t NEXT and CTFNet including the CRNN-MRI module using PyTorch, along with a simple demo. PyTorch version needs to be higher than Torch 0.4.
To train k-t NEXT on single-coil data:
python main_kt_NEXT.py --acceleration_factor 4
To train CTFNet on multi-coil data:
python main_CTFNet.py --acceleration_factor 8
If you use the code for your work, or if you found the code useful, please cite the following work.
Qin C, et al. (2019) k-t NEXT: Dynamic MR Image Reconstruction Exploiting Spatio-Temporal Correlations. In: Shen D. et al. (eds) Medical Image Computing and Computer Assisted Intervention – MICCAI 2019. MICCAI 2019. Lecture Notes in Computer Science, vol 11765. Springer, Cham. https://doi.org/10.1007/978-3-030-32245-8_56
Qin C, et al. (2021) "Complementary Time-Frequency Domain Networks for Dynamic Parallel MR Image Reconstruction." Magnetic Resonance in Medicine.
If you use the CRNN-MRI module, please also cite:
C. Qin, J. Schlemper, J. Caballero, A. N. Price, J. V. Hajnal and D. Rueckert, "Convolutional Recurrent Neural Networks for Dynamic MR Image Reconstruction," in IEEE Transactions on Medical Imaging, vol. 38, no. 1, pp. 280-290, Jan. 2019, doi: 10.1109/TMI.2018.2863670.