Search Results for author: Orcun Goksel

Found 43 papers, 5 papers with code

FGGP: Fixed-Rate Gradient-First Gradual Pruning

no code implementations8 Nov 2024 Lingkai Zhu, Can Deniz Bezek, Orcun Goksel

In recent years, the increasing size of deep learning models and their growing demand for computational resources have drawn significant attention to the practice of pruning neural networks, while aiming to preserve their accuracy.

Joint semi-supervised and contrastive learning enables zero-shot domain-adaptation and multi-domain segmentation

no code implementations8 May 2024 Alvaro Gomariz, Yusuke Kikuchi, Yun Yvonna Li, Thomas Albrecht, Andreas Maunz, Daniela Ferrara, Huanxiang Lu, Orcun Goksel

We introduce SegCLR, a versatile framework designed to segment volumetric images across different domains, employing supervised and contrastive learning simultaneously to effectively learn from both labeled and unlabeled data.

Contrastive Learning Segmentation +1

Learning the Imaging Model of Speed-of-Sound Reconstruction via a Convolutional Formulation

no code implementations1 Sep 2023 Can Deniz Bezek, Maxim Haas, Richard Rau, Orcun Goksel

This operates based on a forward model that relates the sought local values of SoS to observed speckle shifts, for which the associated image reconstruction inverse problem is solved.

Image Reconstruction

Unpaired Translation from Semantic Label Maps to Images by Leveraging Domain-Specific Simulations

no code implementations21 Feb 2023 Lin Zhang, Tiziano Portenier, Orcun Goksel

We introduce a contrastive learning framework for generating photorealistic images from simulated label maps, by learning from unpaired sets of both.

Contrastive Learning Image Generation +1

Multi-scale Feature Alignment for Continual Learning of Unlabeled Domains

no code implementations2 Feb 2023 Kevin Thandiackal, Luigi Piccinelli, Pushpak Pati, Orcun Goksel

Methods for unsupervised domain adaptation (UDA) help to improve the performance of deep neural networks on unseen domains without any labeled data.

Continual Learning Unsupervised Domain Adaptation

Generative appearance replay for continual unsupervised domain adaptation

no code implementations3 Jan 2023 Boqi Chen, Kevin Thandiackal, Pushpak Pati, Orcun Goksel

In contrast to single-step unsupervised domain adaptation (UDA), continual adaptation to a sequence of domains enables leveraging and consolidation of information from multiple domains.

Continual Learning Unsupervised Domain Adaptation

Differentiable Zooming for Multiple Instance Learning on Whole-Slide Images

no code implementations26 Apr 2022 Kevin Thandiackal, Boqi Chen, Pushpak Pati, Guillaume Jaume, Drew F. K. Williamson, Maria Gabrani, Orcun Goksel

Multiple Instance Learning (MIL) methods have become increasingly popular for classifying giga-pixel sized Whole-Slide Images (WSIs) in digital pathology.

Multiple Instance Learning whole slide images

Unsupervised Domain Adaptation with Contrastive Learning for OCT Segmentation

no code implementations7 Mar 2022 Alvaro Gomariz, Huanxiang Lu, Yun Yvonna Li, Thomas Albrecht, Andreas Maunz, Fethallah Benmansour, Alessandra M. Valcarcel, Jennifer Luu, Daniela Ferrara, Orcun Goksel

We evaluate our methods for domain adaptation from a (labeled) source domain to an (unlabeled) target domain, each containing images acquired with different acquisition devices.

Contrastive Learning Unsupervised Domain Adaptation

Estimating Mean Speed-of-Sound from Sequence-Dependent Geometric Disparities

no code implementations24 Sep 2021 Xenia Augustin, Lin Zhang, Orcun Goksel

We demonstrate the effectiveness of our proposed method for tomographic SoS reconstruction.

Generative Feature-driven Image Replay for Continual Learning

no code implementations9 Jun 2021 Kevin Thandiackal, Tiziano Portenier, Andrea Giovannini, Maria Gabrani, Orcun Goksel

In this work, we propose Genifer (GENeratIve FEature-driven image Replay), where a generative model is trained to replay images that must induce the same hidden features as real samples when they are passed through the classifier.

Class Incremental Learning Incremental Learning

Motion Estimation for Optical Coherence Elastography Using Signal Phase and Intensity

no code implementations19 Mar 2021 Hossein Khodadadi, Orcun Goksel, Sabine Kling

Displacement estimation in optical coherence tomography (OCT) imaging is relevant for several potential applications, e. g. for optical coherence elastography (OCE) for corneal biomechanical characterization.

Motion Estimation

Probabilistic Spatial Analysis in Quantitative Microscopy with Uncertainty-Aware Cell Detection using Deep Bayesian Regression of Density Maps

no code implementations23 Feb 2021 Alvaro Gomariz, Tiziano Portenier, César Nombela-Arrieta, Orcun Goksel

We herein propose a deep learning-based cell detection framework that can operate on large microscopy images and outputs desired probabilistic predictions by (i) integrating Bayesian techniques for the regression of uncertainty-aware density maps, where peak detection can be applied to generate cell proposals, and (ii) learning a mapping from the numerous proposals to a probabilistic space that is calibrated, i. e. accurately represents the chances of a successful prediction.

Cell Detection Image Classification +1

Hierarchical Graph Representations in Digital Pathology

4 code implementations22 Feb 2021 Pushpak Pati, Guillaume Jaume, Antonio Foncubierta, Florinda Feroce, Anna Maria Anniciello, Giosuè Scognamiglio, Nadia Brancati, Maryse Fiche, Estelle Dubruc, Daniel Riccio, Maurizio Di Bonito, Giuseppe De Pietro, Gerardo Botti, Jean-Philippe Thiran, Maria Frucci, Orcun Goksel, Maria Gabrani

We propose a novel multi-level hierarchical entity-graph representation of tissue specimens to model hierarchical compositions that encode histological entities as well as their intra- and inter-entity level interactions.

Graph Neural Network

Utilizing Uncertainty Estimation in Deep Learning Segmentation of Fluorescence Microscopy Images with Missing Markers

no code implementations27 Jan 2021 Alvaro Gomariz, Raphael Egli, Tiziano Portenier, César Nombela-Arrieta, Orcun Goksel

However, for combinations that do not exist in a labeled training dataset, one cannot have any estimation of potential segmentation quality if that combination is encountered during inference.

Image Segmentation Segmentation +1

Learning Ultrasound Rendering from Cross-Sectional Model Slices for Simulated Training

no code implementations20 Jan 2021 Lin Zhang, Tiziano Portenier, Orcun Goksel

Given the high level of expertise required for navigation and interpretation of ultrasound images, computational simulations can facilitate the training of such skills in virtual reality.

Translation

Computational Analysis of Subscapularis Tears and Pectoralis Major Transfers on Muscular Activity

no code implementations28 Dec 2020 Fabien Péan, Philippe Favre, Orcun Goksel

Furthermore, although the PMA acts asynchronously to the subscapularis before the transfer, its patterns of activation change significantly after the transfer.

Medical Physics Computational Engineering, Finance, and Science Quantitative Methods

Influence of Rotator Cuff Integrity on Loading and Kinematics Before and After Reverse Shoulder Arthroplasty

no code implementations17 Dec 2020 Fabien Péan, Philippe Favre, Orcun Goksel

The model was validated with respect to in-vivo glenohumeral joint reaction force (JRF) measurements, and also compared to existing clinical and biomechanical data.

Medical Physics Quantitative Methods

Quantifying Explainers of Graph Neural Networks in Computational Pathology

3 code implementations CVPR 2021 Guillaume Jaume, Pushpak Pati, Behzad Bozorgtabar, Antonio Foncubierta-Rodríguez, Florinda Feroce, Anna Maria Anniciello, Tilman Rau, Jean-Philippe Thiran, Maria Gabrani, Orcun Goksel

However, popular deep learning methods and explainability techniques (explainers) based on pixel-wise processing disregard biological entities' notion, thus complicating comprehension by pathologists.

Reinforcement Learning of Musculoskeletal Control from Functional Simulations

1 code implementation13 Jul 2020 Emanuel Joos, Fabien Péan, Orcun Goksel

With muscle activations for movements often being highly redundant, nonlinear, and time dependent, machine learning can provide a solution for their modeling and control for anatomy-specific musculoskeletal simulations.

Anatomy Deep Reinforcement Learning +2

Towards Explainable Graph Representations in Digital Pathology

no code implementations1 Jul 2020 Guillaume Jaume, Pushpak Pati, Antonio Foncubierta-Rodriguez, Florinda Feroce, Giosue Scognamiglio, Anna Maria Anniciello, Jean-Philippe Thiran, Orcun Goksel, Maria Gabrani

Explainability of machine learning (ML) techniques in digital pathology (DP) is of great significance to facilitate their wide adoption in clinics.

GramGAN: Deep 3D Texture Synthesis From 2D Exemplars

no code implementations NeurIPS 2020 Tiziano Portenier, Siavash Bigdeli, Orcun Goksel

Inspired by recent advances in natural texture synthesis, we train deep neural models to generate textures by non-linearly combining learned noise frequencies.

Style Transfer Texture Synthesis

Training Variational Networks with Multi-Domain Simulations: Speed-of-Sound Image Reconstruction

no code implementations25 Jun 2020 Melanie Bernhardt, Valery Vishnevskiy, Richard Rau, Orcun Goksel

In this work, we present for the first time a VN solution for a pulse-echo SoS image reconstruction problem using diverging waves with conventional transducers and single-sided tissue access.

Domain Adaptation Image Reconstruction +1

Deep Image Translation for Enhancing Simulated Ultrasound Images

no code implementations18 Jun 2020 Lin Zhang, Tiziano Portenier, Christoph Paulus, Orcun Goksel

To incorporate anatomical information potentially lost in low quality images, we additionally provide segmentation maps to image translation.

Image-to-Image Translation Translation

Mitosis Detection Under Limited Annotation: A Joint Learning Approach

no code implementations17 Jun 2020 Pushpak Pati, Antonio Foncubierta-Rodriguez, Orcun Goksel, Maria Gabrani

Our framework significantly improves the detection with small training data and achieves on par or superior performance compared to state-of-the-art methods for using the entire training data.

Metric Learning Mitosis Detection

Delineating Bone Surfaces in B-Mode Images Constrained by Physics of Ultrasound Propagation

no code implementations7 Jan 2020 Firat Ozdemir, Christine Tanner, Orcun Goksel

Bone surface delineation in ultrasound is of interest due to its potential in diagnosis, surgical planning, and post-operative follow-up in orthopedics, as well as the potential of using bones as anatomical landmarks in surgical navigation.

Active Learning for Segmentation Based on Bayesian Sample Queries

no code implementations22 Dec 2019 Firat Ozdemir, Zixuan Peng, Philipp Fuernstahl, Christine Tanner, Orcun Goksel

In an active learning framework of selecting informed samples for manual labeling, expert clinician time for manual annotation can be optimally utilized, enabling the establishment of large labeled datasets for machine learning.

Active Learning Segmentation

Deep Variational Networks with Exponential Weighting for Learning Computed Tomography

no code implementations13 Jun 2019 Valery Vishnevskiy, Richard Rau, Orcun Goksel

Tomographic image reconstruction is relevant for many medical imaging modalities including X-ray, ultrasound (US) computed tomography (CT) and photoacoustics, for which the access to full angular range tomographic projections might be not available in clinical practice due to physical or time constraints.

Computed Tomography (CT) Image Reconstruction +1

Weighted Mean Curvature

no code implementations17 Mar 2019 Yuanhao Gong, Orcun Goksel

In this paper, we introduce weighted mean curvature (WMC) as a novel image prior and present an efficient computation scheme for its discretization in practical image processing applications.

Bayesian Inference

SCATGAN for Reconstruction of Ultrasound Scatterers Using Generative Adversarial Networks

no code implementations1 Feb 2019 Andrawes Al Bahou, Christine Tanner, Orcun Goksel

We demonstrate robust reconstruction results, invariant to US viewing and imaging settings such as imaging direction and center frequency.

Translation

Siamese Networks with Location Prior for Landmark Tracking in Liver Ultrasound Sequences

no code implementations23 Jan 2019 Alvaro Gomariz, Weiye Li, Ece Ozkan, Christine Tanner, Orcun Goksel

Image-guided radiation therapy can benefit from accurate motion tracking by ultrasound imaging, in order to minimize treatment margins and radiate moving anatomical targets, e. g., due to breathing.

Landmark Tracking

Extending Pretrained Segmentation Networks with Additional Anatomical Structures

1 code implementation12 Nov 2018 Firat Ozdemir, Orcun Goksel

We propose a class-incremental segmentation framework for extending a deep network trained for some anatomical structure to yet another structure using a small incremental annotation set.

class-incremental learning Class Incremental Learning +2

Implicit Modeling with Uncertainty Estimation for Intravoxel Incoherent Motion Imaging

no code implementations22 Oct 2018 Lin Zhang, Valery Vishnevskiy, Andras Jakab, Orcun Goksel

Intravoxel incoherent motion (IVIM) imaging allows contrast-agent free in vivo perfusion quantification with magnetic resonance imaging (MRI).

Generative Adversarial Networks for MR-CT Deformable Image Registration

no code implementations19 Jul 2018 Christine Tanner, Firat Ozdemir, Romy Profanter, Valeriy Vishnevsky, Ender Konukoglu, Orcun Goksel

Performance for the abdominal region was similar to that of CT-MRI NMI registration (77. 4 vs. 78. 8%) when using 3D synthesizing MRIs (12 slices) and medium sized receptive fields for the discriminator.

Image Generation Image Registration

Image Reconstruction via Variational Network for Real-Time Hand-Held Sound-Speed Imaging

no code implementations19 Jul 2018 Valery Vishnevskiy, Sergio J Sanabria, Orcun Goksel

Speed-of-sound is a biomechanical property for quantitative tissue differentiation, with great potential as a new ultrasound-based image modality.

Image Reconstruction Rolling Shutter Correction

Active Learning for Segmentation by Optimizing Content Information for Maximal Entropy

no code implementations18 Jul 2018 Firat Ozdemir, Zixuan Peng, Christine Tanner, Philipp Fuernstahl, Orcun Goksel

Segmentation is essential for medical image analysis tasks such as intervention planning, therapy guidance, diagnosis, treatment decisions.

Active Learning Medical Image Analysis +1

Learn the new, keep the old: Extending pretrained models with new anatomy and images

no code implementations1 Jun 2018 Firat Ozdemir, Philipp Fuernstahl, Orcun Goksel

Deep learning has been widely accepted as a promising solution for medical image segmentation, given a sufficiently large representative dataset of images with corresponding annotations.

Anatomy Image Segmentation +4

Herding Generalizes Diverse M -Best Solutions

no code implementations14 Nov 2016 Ece Ozkan, Gemma Roig, Orcun Goksel, Xavier Boix

We show that the algorithm to extract diverse M -solutions from a Conditional Random Field (called divMbest [1]) takes exactly the form of a Herding procedure [2], i. e. a deterministic dynamical system that produces a sequence of hypotheses that respect a set of observed moment constraints.

Semantic Segmentation

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