Usama Mirza
Usama Mirza
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Conference Paper
Low-Frequency Anchored Diffusion Transition Process for MRI Reconstruction
A diffusion transition process for accelerated MRI reconstruction that is anchored on low-frequency k-space data.
Usama Mirza
,
Efe Ozdilek
,
Esin Öztürk-Işık
,
Tolga Çukur
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DOI
Frequency-Based Soft Diffusion Model for Accelerated MRI Reconstruction
A diffusion model for MRI reconstruction whose forward process progressively removes k-space frequencies while adding Gaussian noise, mimicking undersampled acquisitions.
Usama Mirza
,
Mustafa Arda Aydın
,
Tolga Çukur
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DOI
Super Resolution MRI via Upscaling Diffusion Bridges
Super-Resolution Diffusion Bridges (SRDB) learn a direct mapping from low- to high-resolution MR images instead of starting from Gaussian noise, improving structural consistency.
Usama Mirza
,
Fuat Arslan
,
Tolga Çukur
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DOI
Denoising Diffusion Adversarial Models for Unconditional Medical Image Generation
Diff-Med-Synth combines denoising diffusion models with GANs to generate realistic and diverse medical images from noise with fast sampling.
Onat Dalmaz
,
Baturay Saglam
,
Gökberk Elmas
,
Usama Mirza
,
Tolga Çukur
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DOI
Super-Resolution Diffusion Model for Accelerated MRI Reconstruction
ResDiff combines a resolution-decreasing operator with diffusion noise scheduling, achieving competitive MRI reconstructions in far less sampling time.
Usama Mirza
,
Tolga Çukur
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DOI
Personalized, Federated, and Unified MRI Contrast Synthesis
A personalized federated learning approach that trains one unified MRI contrast synthesis model across institutions while adapting to each site and task.
Onat Dalmaz
,
Usama Mirza
,
Gökberk Elmas
,
Muzaffer Özbey
,
Salman UH Dar
,
Emir Ceyani
,
Salman Avestimehr
,
Tolga Çukur
A Specificity-Preserving Generative Model for Federated MRI Translation
A federated MRI contrast translation model that adaptively normalizes generator feature maps with site-specific latent variables to stay reliable under domain shifts.
Onat Dalmaz
,
Usama Mirza
,
Gökberk Elmas
,
Muzaffer Özbey
,
Salman UH Dar
,
Tolga Çukur
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DOI
Skip Connections for Medical Image Synthesis with Generative Adversarial Networks
Adding skip connections to GAN generators counters the performance drop of deeper networks in one-to-one MRI contrast synthesis.
Usama Mirza
,
Onat Dalmaz
,
Tolga Çukur
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