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Abstract #1079

POCS-Transformer for MR Image Reconstruction

Anam Nazir1, Muhammad Nadeem Cheema1, Yiran Li1, Yulin Chang2, John A Detre3, and Ze Wang1
1Department of Diagnostic Radiology and Nuclear Medicine, School of Medicine, University of Maryland,, Baltiomore, MD, United States, 2Siemens Healthineers, Baltimore, MD, United States, 3Department of Neurology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States

Synopsis

Keywords: Image Reconstruction, Brain, Reconstruction

Motivation: Transformers excel in medical image processing but require many parameters and training data. We mitigated this issue with the POCS-Transformer method.

Goal(s): POCS-Transformer goal was to enhances MR image reconstruction along with preserving image quality with various under-sampling masks.

Approach: The POCS-Transformer, built on Swin-T using FastMRI data, employed binary undersampling, POCS augmentation, data consistency penalties, and was compared to VN and POCS-CycleGAN on test data.

Results: POCS-Transformer outperformed POCS-CycleGAN with superior image quality and less blurring. POCS-Transformer achieved higher mean PSNR and SSIM compared to both VN and POCS-CycleGAN in knee and brain image datasets.

Impact: The POCS-Transformer improves MR image reconstruction in terms of reducing blurring even under diverse under-sampling conditions. Its impact extends to healthcare and research. New questions involve its applications in medical imaging, merging traditional and modern methods to inspire further innovations.

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Keywords