Search Results for author: Joachim A. Behar

Found 28 papers, 3 papers with code

Benchmarking Ophthalmology Foundation Models for Clinically Significant Age Macular Degeneration Detection

no code implementations8 May 2025 Benjamin A. Cohen, Jonathan Fhima, Meishar Meisel, Baskin Meital, Luis Filipe Nakayama, Eran Berkowitz, Joachim A. Behar

Self-supervised learning (SSL) has enabled Vision Transformers (ViTs) to learn robust representations from large-scale natural image datasets, enhancing their generalization across domains.

Benchmarking Out-of-Distribution Generalization +1

HYAMD High-Resolution Fundus Image Dataset for age related macular degeneration (AMD) Diagnosis

no code implementations7 May 2025 Meishar Meisel, Benjamin A. Cohen, Meital Baskin, Beatrice Tiosano, Joachim A. Behar, Eran Berkowitz

The Hillel Yaffe Age Related Macular Degeneration (HYAMD) dataset is a longitudinal collection of 1, 560 Digital Fundus Images (DFIs) from 325 patients examined at the Hillel Yaffe Medical Center (Hadera, Israel) between 2021 and 2024.

SHDB-AF: a Japanese Holter ECG database of atrial fibrillation

no code implementations22 Jun 2024 Kenta Tsutsui, Shany Biton Brimer, Noam Ben-Moshe, Jean Marc Sellal, Julien Oster, Hitoshi Mori, Yoshifumi Ikeda, Takahide Arai, Shintaro Nakano, Ritsushi Kato, Joachim A. Behar

Atrial fibrillation (AF) is a common atrial arrhythmia that impairs quality of life and causes embolic stroke, heart failure and other complications.

Diagnostic

SleepPPG-Net2: Deep learning generalization for sleep staging from photoplethysmography

no code implementations10 Apr 2024 Shirel Attia, Revital Shani Hershkovich, Alissa Tabakhov, Angeleene Ang, Sharon Haimov, Riva Tauman, Joachim A. Behar

Methods: This study aimed to develop a generalizable deep learning model for the task of four class (wake, light, deep, and rapid eye movement (REM)) sleep staging from raw PPG physiological time-series.

Deep Learning Management +2

RawECGNet: Deep Learning Generalization for Atrial Fibrillation Detection from the Raw ECG

no code implementations26 Dec 2023 Noam Ben-Moshe, Kenta Tsutsui, Shany Biton, Leif Sörnmo, Joachim A. Behar

Methods: To address this limitation, we have developed a deep learning model, named RawECGNet, to detect episodes of AF and atrial flutter (AFl) using the raw, single-lead ECG.

Atrial Fibrillation Detection Deep Learning +1

Generalization in medical AI: a perspective on developing scalable models

no code implementations9 Nov 2023 Eran Zvuloni, Leo Anthony Celi, Joachim A. Behar

The scientific community is increasingly recognizing the importance of generalization in medical AI for translating research into practical clinical applications.

Diversity Out-of-Distribution Generalization +1

End-to-end Risk Prediction of Atrial Fibrillation from the 12-Lead ECG by Deep Neural Networks

1 code implementation28 Sep 2023 Theogene Habineza, Antônio H. Ribeiro, Daniel Gedon, Joachim A. Behar, Antonio Luiz P. Ribeiro, Thomas B. Schön

Background: Atrial fibrillation (AF) is one of the most common cardiac arrhythmias that affects millions of people each year worldwide and it is closely linked to increased risk of cardiovascular diseases such as stroke and heart failure.

Decision Making Management

LUNet: Deep Learning for the Segmentation of Arterioles and Venules in High Resolution Fundus Images

1 code implementation11 Sep 2023 Jonathan Fhima, Jan Van Eijgen, Hana Kulenovic, Valérie Debeuf, Marie Vangilbergen, Marie-Isaline Billen, Heloïse Brackenier, Moti Freiman, Ingeborg Stalmans, Joachim A. Behar

Using active learning, we created a new DFI dataset containing 240 crowd-sourced manual A/V segmentations performed by fifteen medical students and reviewed by an ophthalmologist, and developed LUNet, a novel deep learning architecture for high resolution A/V segmentation.

Active Learning Artery/Veins Retinal Vessel Segmentation +1

Machine Learning for Ranking f-wave Extraction Methods in Single-Lead ECGs

no code implementations17 Jul 2023 Noam Ben-Moshe, Shany Biton, Kenta Tsutsui, Mahmoud Suleiman, Leif Sörnmo, Joachim A. Behar

The approach is well-suited for processing large Holter data sets annotated with respect to the presence of AF.

Benchmarking

Estimation of f-wave Dominant Frequency Using a Voting Scheme

no code implementations23 Aug 2022 Shany Biton, Mahmoud Suleiman, Noam Ben Moshe, Leif Sörnmo, Joachim A. Behar

Using these three algorithms in a voting scheme, the classifier obtained AUC=0. 60 and the DAFs were mostly spread around 6 Hz, 5. 66 (4. 83-7. 47).

Lirot.ai: A Novel Platform for Crowd-Sourcing Retinal Image Segmentations

no code implementations22 Aug 2022 Jonathan Fhima, Jan Van Eijgen, Moti Freiman, Ingeborg Stalmans, Joachim A. Behar

Discussion and future work: We will use active learning strategies to continue enlarging our retinal fundus dataset by including a more efficient process to select the images to be annotated and distribute them to annotators.

Active Learning Management

ArNet-ECG: Deep Learning for the Detection of Atrial Fibrillation from the Raw Electrocardiogram

no code implementations22 Aug 2022 Noam Ben-Moshe, Shany Biton, Joachim A. Behar

We further hypothesize that the performance reached leveraging the raw ECG will be superior to previously developed methods using the beat-to-beat interval variation time series.

Time Series Time Series Analysis

PVBM: A Python Vasculature Biomarker Toolbox Based On Retinal Blood Vessel Segmentation

1 code implementation31 Jul 2022 Jonathan Fhima, Jan Van Eijgen, Ingeborg Stalmans, Yevgeniy Men, Moti Freiman, Joachim A. Behar

Results: We built a fully automated vasculature biomarker toolbox based on DFI segmentations and provided a proof of usability to characterize the vascular changes in glaucoma.

Image Segmentation Segmentation +1

Generalizable and Robust Deep Learning Algorithm for Atrial Fibrillation Diagnosis Across Ethnicities, Ages and Sexes

no code implementations20 Jul 2022 Shany Biton, Mohsin Aldhafeeri, Erez Marcusohn, Kenta Tsutsui, Tom Szwagier, Adi Elias, Julien Oster, Jean Marc Sellal, Mahmoud Suleiman, Joachim A. Behar

This retrospective study is, to the best of our knowledge, the first to develop and assess the generalization performance of a deep learning (DL) model for AF events detection from long term beat-to-beat intervals across ethnicities, ages and sexes.

On Merging Feature Engineering and Deep Learning for Diagnosis, Risk-Prediction and Age Estimation Based on the 12-Lead ECG

no code implementations13 Jul 2022 Eran Zvuloni, Jesse Read, Antônio H. Ribeiro, Antonio Luiz P. Ribeiro, Joachim A. Behar

Conclusion: We found that for traditional 12-lead ECG based diagnosis tasks DL did not yield a meaningful improvement over FE, while it improved significantly the nontraditional regression task.

Age Estimation BIG-bench Machine Learning +5

Machine Learning to Support Triage of Children at Risk for Epileptic Seizures in the Pediatric Intensive Care Unit

no code implementations11 May 2022 Raphael Azriel, Cecil D. Hahn, Thomas De Cooman, Sabine Van Huffel, Eric T. Payne, Kristin L. McBain, Danny Eytan, Joachim A. Behar

This research aims to develop a computer aided tool to improve seizures risk assessment in critically-ill children, using an ubiquitously recorded signal in the PICU, namely the electrocardiogram (ECG).

SleepPPG-Net: a deep learning algorithm for robust sleep staging from continuous photoplethysmography

no code implementations11 Feb 2022 Kevin Kotzen, Peter H. Charlton, Sharon Salabi, Lea Amar, Amir Landesberg, Joachim A. Behar

We hypothesize that it is possible to perform robust 4-class sleep staging using the raw photoplethysmography (PPG) time series and modern advances in deep learning (DL).

Management Photoplethysmography (PPG) +4

Machine learning for nocturnal diagnosis of chronic obstructive pulmonary disease using digital oximetry biomarkers

no code implementations10 Dec 2020 Jeremy Levy, Daniel Alvarez, Felix del Campo, Joachim A. Behar

Approach: We hypothesize that patients with COPD will exert certain patterns and/or dynamics of their overnight oximetry time series that are unique to this condition.

BIG-bench Machine Learning Time Series +1

Digital biomarkers and artificial intelligence for mass diagnosis of atrial fibrillation in a population sample at risk of sleep disordered breathing

no code implementations29 Jul 2020 Armand Chocron, Roi Efraim, Franck Mandel, Michael Rueschman, Niclas Palmius, Thomas Penzel, Meyer Elbaz, Joachim A. Behar

However, there is incentive in performing screening for specific at risk groups such as individuals suspected of sleep-disordered breathing where an important association between AF and obstructive sleep apnea (OSA) has been demonstrated.

Rhythm Time Series Analysis

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