1 code implementation • 13 Mar 2024 • Asad Aali, Giannis Daras, Brett Levac, Sidharth Kumar, Alexandros G. Dimakis, Jonathan I. Tamir
We open-source our code and the trained Ambient Diffusion MRI models: https://github. com/utcsilab/ambient-diffusion-mri .
1 code implementation • 5 Jun 2023 • Sriram Ravula, Brett Levac, Ajil Jalal, Jonathan I. Tamir, Alexandros G. Dimakis
Diffusion-based generative models have been used as powerful priors for magnetic resonance imaging (MRI) reconstruction.
no code implementations • 2 May 2023 • Asad Aali, Marius Arvinte, Sidharth Kumar, Jonathan I. Tamir
We present SURE-Score: an approach for learning score-based generative models using training samples corrupted by additive Gaussian noise.
no code implementations • 26 Mar 2023 • Brett Levac, Ajil Jalal, Kannan Ramchandran, Jonathan I. Tamir
This leads to an improvement in image reconstruction fidelity over generative models that rely only on a marginal prior over the image contrast of interest.
no code implementations • 21 Dec 2022 • Ke Wang, Mariya Doneva, Jakob Meineke, Thomas Amthor, Ekin Karasan, Fei Tan, Jonathan I. Tamir, Stella X. Yu, Michael Lustig
Here we propose a supervised learning-based method that directly synthesizes contrast-weighted images from the MRF data without going through the quantitative mapping and spin-dynamics simulation.
Generative Adversarial Network Magnetic Resonance Fingerprinting +1
1 code implementation • 1 Nov 2022 • Brett Levac, Sidharth Kumar, Ajil Jalal, Jonathan I. Tamir
In this work we propose a framework for jointly reconstructing highly sub-sampled MRI data while estimating patient motion using diffusion based generative models.
no code implementations • 1 Jul 2022 • Brett Levac, Sidharth Kumar, Sofia Kardonik, Jonathan I. Tamir
Magnetic Resonance Imaging (MRI) is a widely used medical imaging modality boasting great soft tissue contrast without ionizing radiation, but unfortunately suffers from long acquisition times.
1 code implementation • 21 Jun 2022 • Ali Lotfi Rezaabad, Sidharth Kumar, Sriram Vishwanath, Jonathan I. Tamir
Pretraining on a large source data set and fine-tuning on the target samples is prone to overfitting in the few-shot regime, where only a small number of target samples are available.
no code implementations • 3 May 2022 • Kalina P. Slavkova, Julie C. DiCarlo, Viraj Wadhwa, Chengyue Wu, John Virostko, Sidharth Kumar, Thomas E. Yankeelov, Jonathan I. Tamir
We conclude that the use of an untrained neural network together with a physics-based regularization loss shows promise as a measure for determining the optimal stopping point in training without relying on fully-sampled ground truth data.
1 code implementation • 18 Oct 2021 • Marius Arvinte, Jonathan I. Tamir
Deep learning has been recently applied to physical layer processing in digital communication systems in order to improve end-to-end performance.
2 code implementations • 16 Sep 2021 • Efrat Shimron, Jonathan I. Tamir, Ke Wang, Michael Lustig
We demonstrate this phenomenon for inverse problem solvers and show how their biased performance stems from hidden data preprocessing pipelines.
2 code implementations • NeurIPS 2021 • Ajil Jalal, Marius Arvinte, Giannis Daras, Eric Price, Alexandros G. Dimakis, Jonathan I. Tamir
The CSGM framework (Bora-Jalal-Price-Dimakis'17) has shown that deep generative priors can be powerful tools for solving inverse problems.
no code implementations • 6 Mar 2021 • Ke Wang, Michael Kellman, Christopher M. Sandino, Kevin Zhang, Shreyas S. Vasanawala, Jonathan I. Tamir, Stella X. Yu, Michael Lustig
Deep learning (DL) based unrolled reconstructions have shown state-of-the-art performance for under-sampled magnetic resonance imaging (MRI).
1 code implementation • 2 Mar 2021 • Marius Arvinte, Sriram Vishwanath, Ahmed H. Tewfik, Jonathan I. Tamir
Accelerated multi-coil magnetic resonance imaging reconstruction has seen a substantial recent improvement combining compressed sensing with deep learning.
no code implementations • 11 Sep 2018 • Michael J. Anderson, Jonathan I. Tamir, Javier S. Turek, Marcus T. Alley, Theodore L. Willke, Shreyas S. Vasanawala, Michael Lustig
Our improvements to the pipeline on a single machine provide a 3x overall reconstruction speedup, which allowed us to add algorithmic changes improving image quality.