Search Results for author: Mohamed S. Elmahdy

Found 7 papers, 1 papers with code

Joint Registration and Segmentation via Multi-Task Learning for Adaptive Radiotherapy of Prostate Cancer

no code implementations5 May 2021 Mohamed S. Elmahdy, Laurens Beljaards, Sahar Yousefi, Hessam Sokooti, Fons Verbeek, U. A. van der Heide, Marius Staring

In this paper, we formulate registration and segmentation as a joint problem via a Multi-Task Learning (MTL) setting, allowing these tasks to leverage their strengths and mitigate their weaknesses through the sharing of beneficial information.

Image Registration Medical Image Registration +1

Esophageal Tumor Segmentation in CT Images using Dilated Dense Attention Unet (DDAUnet)

3 code implementations6 Dec 2020 Sahar Yousefi, Hessam Sokooti, Mohamed S. Elmahdy, Irene M. Lips, Mohammad T. Manzuri Shalmani, Roel T. Zinkstok, Frank J. W. M. Dankers, Marius Staring

The proposed network achieved a $\mathrm{DSC}$ value of $0. 79 \pm 0. 20$, a mean surface distance of $5. 4 \pm 20. 2mm$ and $95\%$ Hausdorff distance of $14. 7 \pm 25. 0mm$ for 287 test scans, demonstrating promising results with a simplified clinical workflow based on CT alone.

Tumor Segmentation

A Cross-Stitch Architecture for Joint Registration and Segmentation in Adaptive Radiotherapy

no code implementations MIDL 2019 Laurens Beljaards, Mohamed S. Elmahdy, Fons Verbeek, Marius Staring

The obtained performance as well as the inference speed make this a promising candidate for daily re-contouring in adaptive radiotherapy, potentially reducing treatment-related side effects and improving quality-of-life after treatment.

Segmentation

Patient-Specific Finetuning of Deep Learning Models for Adaptive Radiotherapy in Prostate CT

no code implementations17 Feb 2020 Mohamed S. Elmahdy, Tanuj Ahuja, U. A. van der Heide, Marius Staring

We investigate a transfer learning approach, fine-tuning the baseline CNN model to a specific patient, based on imaging acquired in earlier treatment fractions.

Transfer Learning

Fast Dynamic Perfusion and Angiography Reconstruction using an end-to-end 3D Convolutional Neural Network

no code implementations24 Aug 2019 Sahar Yousefi, Lydiane Hirschler, Merlijn van der Plas, Mohamed S. Elmahdy, Hessam Sokooti, Matthias Van Osch, Marius Staring

Hadamard time-encoded pseudo-continuous arterial spin labeling (te-pCASL) is a signal-to-noise ratio (SNR)-efficient MRI technique for acquiring dynamic pCASL signals that encodes the temporal information into the labeling according to a Hadamard matrix.

SSIM

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