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Abstract #1959

Deep image reconstruction for MRI using unregistered measurement pairs without ground truth

Weijie Gan1, Yu Sun1, Cihat Eldeniz2, Jiaming Liu3, Hongyu An2, and Ulugbek S. Kamilov1,3
1Department of Computer Science and Engineering, Washington University in St. Louis, St. Louis, MO, United States, 2Mallinckrodt Institute of Radiology, Washington University in St. Louis, St. Louis, MO, United States, 3Department of Electrical and Systems Engineering, Washington University in St. Louis, St. Louis, MO, United States

One of the key limitations in conventional deep learning-based MR image reconstruction is the need for registered pairs of training images, where fullysampled ground truth images are required as the target. We address this limitation by proposing a novel registration-augmented image reconstruction method that trains a CNN by directly mapping pairs of unregistered and undersampled MR measurements. The proposed method is validated on a single-coil MRI data set by training a model directly on pairs of undersampled measurements from images that have undergone nonrigid deformations.

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