Search Results for author: Muzaffer Özbey

Found 11 papers, 6 papers with code

Assessing the capacity of a denoising diffusion probabilistic model to reproduce spatial context

no code implementations19 Sep 2023 Rucha Deshpande, Muzaffer Özbey, Hua Li, Mark A. Anastasio, Frank J. Brooks

However, there remains an important need to understand the extent to which DDPMs can reliably learn medical imaging domain-relevant information, which is referred to as `spatial context' in this work.

Data Augmentation Denoising +1

Learning Deep MRI Reconstruction Models from Scratch in Low-Data Regimes

1 code implementation6 Jan 2023 Salman UH Dar, Şaban Öztürk, Muzaffer Özbey, Tolga Çukur

To alleviate error propagation, PSFNet combines its SS and SG priors via a novel parallel-stream architecture with learnable fusion parameters.

MRI Reconstruction Rolling Shutter Correction

Unsupervised Medical Image Translation with Adversarial Diffusion Models

1 code implementation17 Jul 2022 Muzaffer Özbey, Onat Dalmaz, Salman UH Dar, Hasan A Bedel, Şaban Özturk, Alper Güngör, Tolga Çukur

Extensive assessments are reported on the utility of SynDiff against competing GAN and diffusion models in multi-contrast MRI and MRI-CT translation.

Image-to-Image Translation Imputation +1

Adaptive Diffusion Priors for Accelerated MRI Reconstruction

1 code implementation12 Jul 2022 Alper Güngör, Salman UH Dar, Şaban Öztürk, Yilmaz Korkmaz, Gokberk Elmas, Muzaffer Özbey, Tolga Çukur

A two-phase reconstruction is executed following training: a rapid-diffusion phase that produces an initial reconstruction with the trained prior, and an adaptation phase that further refines the result by updating the prior to minimize data-consistency loss.

De-aliasing MRI Reconstruction

Unsupervised MRI Reconstruction via Zero-Shot Learned Adversarial Transformers

1 code implementation15 May 2021 Yilmaz Korkmaz, Salman UH Dar, Mahmut Yurt, Muzaffer Özbey, Tolga Çukur

Supervised reconstruction models are characteristically trained on matched pairs of undersampled and fully-sampled data to capture an MRI prior, along with supervision regarding the imaging operator to enforce data consistency.

MRI Reconstruction

Three Dimensional MR Image Synthesis with Progressive Generative Adversarial Networks

no code implementations18 Dec 2020 Muzaffer Özbey, Mahmut Yurt, Salman Ul Hassan Dar, Tolga Çukur

Mainstream deep models for three-dimensional MRI synthesis are either cross-sectional or volumetric depending on the input.

Image Generation

Semi-Supervised Learning of Mutually Accelerated MRI Synthesis without Fully-Sampled Ground Truths

no code implementations29 Nov 2020 Mahmut Yurt, Salman Ul Hassan Dar, Muzaffer Özbey, Berk Tınaz, Kader Karlı Oğuz, Tolga Çukur

Here, we propose a novel semi-supervised deep generative model that instead learns to recover high-quality target images directly from accelerated acquisitions of source and target contrasts.

Progressively Volumetrized Deep Generative Models for Data-Efficient Contextual Learning of MR Image Recovery

no code implementations27 Nov 2020 Mahmut Yurt, Muzaffer Özbey, Salman Ul Hassan Dar, Berk Tınaz, Kader Karlı Oğuz, Tolga Çukur

Comprehensive demonstrations on mainstream MRI reconstruction and synthesis tasks show that ProvoGAN yields superior performance to state-of-the-art volumetric and cross-sectional models.

Anatomy MRI Reconstruction

A Transfer-Learning Approach for Accelerated MRI using Deep Neural Networks

no code implementations7 Oct 2017 Salman Ul Hassan Dar, Muzaffer Özbey, Ahmet Burak Çatlı, Tolga Çukur

Methods: Neural networks were trained on thousands of samples from public datasets of either natural images or brain MR images.

4k MRI Reconstruction +1

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