2024
Authors
Vieira, M; Goncalves, T; Silva, W; Sequeira, F;
Publication
BIOSIG 2024 - Proceedings of the 23rd International Conference of the Biometrics Special Interest Group
Abstract
The proliferation of explicit material online, particularly pornography, has emerged as a paramount concern in our society. While state-of-the-art pornography detection models already show some promising results, their decision-making processes are often opaque, raising ethical issues. This study focuses on uncovering the decision-making process of such models, specifically fine-tuned convolutional neural networks and transformer architectures. We compare various explainability techniques to illuminate the limitations, potential improvements, and ethical implications of using these algorithms. Results show that models trained on diverse and dynamic datasets tend to have more robustness and generalisability when compared to models trained on static datasets. Additionally, transformer models demonstrate superior performance and generalisation compared to convolutional ones. Furthermore, we implemented a privacy-preserving framework during explanation retrieval, which contributes to developing secure and ethically sound biometric applications. © 2024 IEEE.
2024
Authors
Gonçalves, T; Hedström, A; Pahud de Mortanges, A; Li, X; Müller, H; Cardoso, S; Reyes, M;
Publication
Trustworthy Ai in Medical Imaging
Abstract
In the healthcare context, artificial intelligence (AI) has the potential to power decision support systems and help health professionals in their clinical decisions. However, given its complexity, AI is usually seen as a black box that receives data and outputs a prediction. This behavior may jeopardize the adoption of this technology by the healthcare community, which values the existence of explanations to justify a clinical decision. Besides, the developers must have a strategy to assess and audit these systems to ensure their reproducibility and quality in production. The field of interpretable artificial intelligence emerged to study how these algorithms work and clarify their behavior. This chapter reviews several interpretability of AI algorithms for medical imaging, discussing their functioning, limitations, benefits, applications, and evaluation strategies. The chapter concludes with considerations that might contribute to bringing these methods closer to the daily routine of healthcare professionals. © 2025 Elsevier Inc. All rights reserved.
2024
Authors
Caldeira, E; Neto, PC; Gonçalves, T; Damer, N; Sequeira, AF; Cardoso, JS;
Publication
Science Talks
Abstract
2024
Authors
Beirão, MM; Matos, J; Gonçalves, T; Kase, C; Nakayama, LF; Freitas, Dd; Cardoso, JS;
Publication
IEEE International Conference on Bioinformatics and Biomedicine, BIBM 2024, Lisbon, Portugal, December 3-6, 2024
Abstract
Keratitis is an inflammatory corneal condition responsible for 10% of visual impairment in low- and middle-income countries (LMICs), with bacteria, fungi, or amoeba as the most common infection etiologies. While an accurate and timely diagnosis is crucial for the selected treatment and the patients' sight outcomes, due to the high cost and limited availability of laboratory diagnostics in LMICs, diagnosis is often made by clinical observation alone, despite its lower accuracy. In this study, we investigate and compare different deep learning approaches to diagnose the source of infection: 1) three separate binary models for infection type predictions; 2) a multitask model with a shared backbone and three parallel classification layers (Multitask V1); and, 3) a multitask model with a shared backbone and a multi-head classification layer (Multitask V2). We used a private Brazilian cornea dataset to conduct the empirical evaluation. We achieved the best results with Multitask V2, with an area under the receiver operating characteristic curve (AUROC) confidence intervals of 0.7413-0.7740 (bacteria), 0.83950.8725 (fungi), and 0.9448-0.9616 (amoeba). A statistical analysis of the impact of patient features on models' performance revealed that sex significantly affects amoeba infection prediction, and age seems to affect fungi and bacteria predictions. © 2024 IEEE.
2024
Authors
Beirão, MM; Matos, J; Gonçalves, T; Kase, C; Nakayama, LF; Freitas, Dd; Cardoso, JS;
Publication
CoRR
Abstract
2024
Authors
Eduard-Alexandru Bonci; Orit Kaidar-Person; Marília Antunes; Oriana Ciani; Helena Cruz; Rosa Di Micco; Oreste Davide Gentilini; Nicole Rotmensz; Pedro Gouveia; Jörg Heil; Pawel Kabata; Nuno Freitas; Tiago Gonçalves; Miguel Romariz; Helena Montenegro; Hélder P. Oliveira; Jaime S. Cardoso; Henrique Martins; Daniela Lopes; Marta Martinho; Ludovica Borsoi; Elisabetta Listorti; Carlos Mavioso; Martin Mika; André Pfob; Timo Schinköthe; Giovani Silva; Maria-Joao Cardoso;
Publication
Cancer Research
Abstract
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