Search Results for author: Samah Khawaled

Found 8 papers, 3 papers with code

NPB-REC: A Non-parametric Bayesian Deep-learning Approach for Undersampled MRI Reconstruction with Uncertainty Estimation

1 code implementation6 Apr 2024 Samah Khawaled, Moti Freiman

We introduce "NPB-REC", a non-parametric fully Bayesian framework, for MRI reconstruction from undersampled data with uncertainty estimation.

MRI Reconstruction SSIM

A self-attention model for robust rigid slice-to-volume registration of functional MRI

no code implementations6 Apr 2024 Samah Khawaled, Simon K. Warfield, Moti Freiman

Furthermore, our approach exhibits significantly faster registration speed compared to conventional iterative methods ($0. 096$ sec.

NPB-REC: Non-parametric Assessment of Uncertainty in Deep-learning-based MRI Reconstruction from Undersampled Data

1 code implementation8 Aug 2022 Samah Khawaled, Moti Freiman

We demonstrated the added-value of our approach on the multi-coil brain MRI dataset, from the fastmri challenge, in comparison to the baseline E2E-VarNet with and without inference-time dropout.

Decision Making MRI Reconstruction +2

NPBDREG: Uncertainty Assessment in Diffeomorphic Brain MRI Registration using a Non-parametric Bayesian Deep-Learning Based Approach

1 code implementation15 Aug 2021 Samah Khawaled, Moti Freiman

The NPBDREG shows a better correlation of the predicted uncertainty with out-of-distribution data ($r>0. 95$ vs. $r<0. 5$) as well as a 7. 3%improvement in the registration accuracy (Dice score, $0. 74$ vs. $0. 69$, $p \ll 0. 01$), and 18% improvement in registration smoothness (percentage of folds in the deformation field, 0. 014 vs. 0. 017, $p \ll 0. 01$).

Decision Making Image Registration

Unsupervised Deep-Learning Based Deformable Image Registration: A Bayesian Framework

no code implementations10 Aug 2020 Samah Khawaled, Moti Freiman

We demonstrated the added-value of our Basyesian unsupervised DL-based registration framework on the MNIST and brain MRI (MGH10) datasets in comparison to the VoxelMorph unsupervised DL-based image registration framework.

Image Registration

On the Self-Similarity of Natural Stochastic Textures

no code implementations16 Jun 2019 Samah Khawaled, Yehoshua Y. Zeevi

We firstly decompose a textured image into two layers corresponding to its texture and structure, and show that the layer representing the stochastic texture is characterized by random phase of uniform distribution, unlike the phase of the structured information which is coherent.

Two-sample testing

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