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Journal Papers

2026 year

Artificial intelligence prediction algorithms for refractive error onset and progression in children and adolescents: A systematic review and meta‐analysis

Athanasia Sandali, Anna Nikolaidou, Theodora Gianni, Andreas Katsimpris, Ioannis D. Apostolopoulos, Lampros Lamprogiannis, Eirini Maliagkani

Acta Ophthalmologica 10.1111/aos.70207

2026 year

Clinician-Centered Evaluation Framework for Explainable AI Heatmaps in OCT-Based Retinal Disease Classification

Eirini Maliagkani, Ilias Georgalas, Ioannis Datseris, Elpiniki Papageorgiou, Ioannis D. Apostolopoulos

Journal of Imaging Vol. 12, No. 5, pp. 211 10.3390/jimaging12050211

2026 year

Explainable Deep Learning Self-Supervised Vision Transformer for Fundus-Based Myopia Classification

Eirini Maliagkani, Christos Tsoutsas, Nikolaos Papageorgiou, Ioannis D. Apostolopoulos, Nikolaos Papandrianos, Ilias Georgalas, Elpiniki Papageorgiou

Acta Ophthalmologica 10.1111/aos.70205

2026 year

Explainable Machine Learning Prognosis of Coronary Artery Disease Using Lifestyle and Medical History Data

Agorastos-Dimitrios Samaras, Ioannis D. Apostolopoulos, Elpiniki Papageorgiou, Nikolaos Papandrianos

Applied Sciences Vol. 16, No. 11, pp. 5444 10.3390/app16115444

2026 year

Explainable YOLOv8 model for solitary pulmonary nodules classification using positron emission tomography and computed tomography scans

Agorastos-Dimitrios Samaras, Serafeim Moustakidis, Ioannis D. Apostolopoulos, Elpiniki Papageorgiou, Nikolaos D. Papathanasiou, Dimitris J. Apostolopoulos, Nikolaos Papandrianos

Journal of Intelligent Systems Vol. 35, No. 1 10.1515/jisys-2025-0064

2026 year

MedScanGAN: Synthetic PET & CT Scan Generation Using Conditional Generative Adversarial Networks for Medical AI Data Augmentation

Agorastos-Dimitrios Samaras, Ioannis D. Apostolopoulos, Nikolaos Papandrianos

Bioengineering Vol. 13, No. 3, pp. 281 10.3390/bioengineering13030281

2025 year

A machine learning approach for determining solitary pulmonary nodule malignancy in patients undergoing PET/CT examination

Ioannis D. Apostolopoulos, Nikolaos D. Papathanasiou, Dimitris J. Apostolopoulos, Elpiniki I. Papageorgiou, Nikolaos Papandrianos

Multimedia Tools and Applications Vol. 84, No. 32, pp. 39905-39924 10.1007/s11042-025-20737-x

2025 year

A Review on SPECT Myocardial Perfusion Imaging Attenuation Correction Using Deep Learning

Ioannis D. Apostolopoulos, Nikolaοs Ι. Papandrianos, Elpiniki I. Papageorgiou, Dimitris J. Apostolopoulos

Applied Sciences Vol. 15, No. 20, pp. 11287 10.3390/app152011287

2025 year

Artificial Intelligence Algorithms for Epiretinal Membrane Detection, Segmentation and Postoperative BCVA Prediction: A Systematic Review and Meta-Analysis

Eirini Maliagkani, Petroula Mitri, Dimitra Mitsopoulou, Andreas Katsimpris, Ioannis D. Apostolopoulos, Athanasia Sandali, Konstantinos Tyrlis, Nikolaos Papandrianos, Ilias Georgalas

Applied Sciences Vol. 15, No. 22, pp. 12280 10.3390/app152212280

2025 year

Artificial Intelligence Approaches for Geographic Atrophy Segmentation: A Systematic Review and Meta-Analysis

Aikaterini Chatzara, Eirini Maliagkani, Dimitra Mitsopoulou, Andreas Katsimpris, Ioannis D. Apostolopoulos, Elpiniki Papageorgiou, Ilias Georgalas

Bioengineering Vol. 12, No. 5, pp. 475 10.3390/bioengineering12050475

2025 year

Monitoring of Indoor Air Quality in a Classroom Combining a Low-Cost Sensor System and Machine Learning

Ioannis D. Apostolopoulos, Eleni Dovrou, Silas Androulakis, Katerina Seitanidi, Maria P. Georgopoulou, Angeliki Matrali, Georgia Argyropoulou, Christos Kaltsonoudis, George Fouskas, Spyros N. Pandis

Chemosensors Vol. 13, No. 4, pp. 148 10.3390/chemosensors13040148

2025 year

Neural-FCM: a deep learning approach for weight matrix optimization in Fuzzy Cognitive Map classifiers

Theodoros Tziolas, Konstantinos Papageorgiou, Ioannis Apostolopoulos, Elpiniki Papageorgiou

Applied Intelligence Vol. 55, No. 13 10.1007/s10489-025-06795-6

2025 year
2025 year

Utility of disease probability scores to guide decision-making during screening for phaeochromocytoma and paraganglioma: a machine learning modelling cross sectional study

Christina Pamporaki, Georg Pommer, Ioannis D. Apostolopoulos, Angelos Filippatos, Mirko Peitzsch, Hanna Remde, Georgiana Constantinescu, Annika M.A. Berends, Matthew A. Nazari, Felix Beuschlein, Martin Fassnacht, Aleksander Prejbisz, Karel Pacak, Graeme Eisenhofer

eClinicalMedicine Vol. 82, pp. 103181 10.1016/j.eclinm.2025.103181

2024 year

A Multi-Modal Machine Learning Methodology for Predicting Solitary Pulmonary Nodule Malignancy in Patients Undergoing PET/CT Examination

Ioannis D. Apostolopoulos, Nikolaos D. Papathanasiou, Dimitris J. Apostolopoulos, Nikolaos Papandrianos, Elpiniki I. Papageorgiou

Big Data and Cognitive Computing Vol. 8, No. 8, pp. 85 10.3390/bdcc8080085

2024 year

Between Two Worlds: Investigating the Intersection of Human Expertise and Machine Learning in the Case of Coronary Artery Disease Diagnosis

Ioannis D. Apostolopoulos, Nikolaos I. Papandrianos, Dimitrios J. Apostolopoulos and Elpiniki Papageorgiou

Bioengineering 11(10), 957 10.3390/bioengineering11100957/s1

2024 year

Calibration and Inter-Unit Consistency Assessment of an Electrochemical Sensor System Using Machine Learning

Ioannis D. Apostolopoulos, Silas Androulakis, Panayiotis Kalkavouras, George Fouskas, Spyros N. Pandis

Sensors Vol. 24, No. 13, pp. 4110 10.3390/s24134110

2024 year

Evaluation of Air Quality in a Primary School Classroom During Wintertime

Eleni Dovrou, Christos Kaltsonoudis, Silas Androulakis, Ioannis Apostolopoulos, Andrea Simonati, Spyros N. Pandis

Indoor Air Vol. 2024, No. 1 10.1155/ina/7888273

2024 year

Fuzzy Cognitive Map Applications in Medicine over the Last Two Decades: A Review Study

Ioannis D. Apostolopoulos, Nikolaos I. Papandrianos, Nikolaos D. Papathanasiou, Elpiniki I. Papageorgiou

Bioengineering Vol. 11, No. 2, pp. 139 10.3390/bioengineering11020139

2024 year

Integrating Machine Learning in Clinical Practice for Characterizing the Malignancy of Solitary Pulmonary Nodules in PET/CT Screening

Ioannis D. Apostolopoulos, Nikolaos D. Papathanasiou, Dimitris J. Apostolopoulos, Nikolaos Papandrianos, Elpiniki I. Papageorgiou

Diseases Vol. 12, No. 6, pp. 115 10.3390/diseases12060115

2023 year

A General Machine Learning Model for Assessing Fruit Quality Using Deep Image Features

Ioannis D. Apostolopoulos, Mpesi Tzani, Sokratis I. Aznaouridis

AI Vol. 4, No. 4, pp. 812-830 10.3390/ai4040041

2023 year

AI-based classification algorithms in SPECT myocardial perfusion imaging for cardiovascular diagnosis: a review

Nikolaos I. Papandrianos, Ioannis D. Apostolopoulos, Anna Feleki, Serafeim Moustakidis, Konstantinos Kokkinos, Elpiniki I. Papageorgiou

Nuclear Medicine Communications Vol. 44, No. 1, pp. 1-11 10.1097/mnm.0000000000001634

2023 year
2023 year

Classification models for assessing coronary artery disease instances using clinical and biometric data: an explainable man-in-the-loop approach

Agorastos-Dimitrios Samaras, Serafeim Moustakidis, Ioannis D. Apostolopoulos, Nikolaos Papandrianos, Elpiniki Papageorgiou

Scientific Reports Vol. 13, No. 1 10.1038/s41598-023-33500-9

2023 year

Deep learning-enhanced nuclear medicine SPECT imaging applied to cardiac studies

Ioannis D. Apostolopoulos, Nikolaos I. Papandrianos, Anna Feleki, Serafeim Moustakidis, Elpiniki I. Papageorgiou

EJNMMI Physics Vol. 10, No. 1 10.1186/s40658-022-00522-7

2023 year

Explainable Artificial Intelligence Method (ParaNet+) Localises Abnormal Parathyroid Glands in Scintigraphic Scans of Patients with Primary Hyperparathyroidism

Dimitris J. Apostolopoulos, Ioannis D. Apostolopoulos, Nikolaos D. Papathanasiou, Trifon Spyridonidis, George S. Panayiotakis

Algorithms Vol. 16, No. 9, pp. 435 10.3390/a16090435

2023 year

Explainable Deep Fuzzy Cognitive Map Diagnosis of Coronary Artery Disease: Integrating Myocardial Perfusion Imaging, Clinical Data, and Natural Language Insights

Anna Feleki, Ioannis D. Apostolopoulos, Serafeim Moustakidis, Elpiniki I. Papageorgiou, Nikolaos Papathanasiou, Dimitrios Apostolopoulos, Nikolaos Papandrianos

Applied Sciences Vol. 13, No. 21, pp. 11953 10.3390/app132111953

2023 year
2023 year

Fuzzy Cognitive Maps: Their Role in Explainable Artificial Intelligence

Ioannis D. Apostolopoulos, Peter P. Groumpos

Applied Sciences Vol. 13, No. 6, pp. 3412 10.3390/app13063412

2023 year

Industrial object and defect recognition utilizing multilevel feature extraction from industrial scenes with Deep Learning approach

Ioannis D. Apostolopoulos, Mpesiana A. Tzani

Journal of Ambient Intelligence and Humanized Computing Vol. 14, No. 8, pp. 10263-10276 10.1007/s12652-021-03688-7

2023 year

Innovative Attention-Based Explainable Feature-Fusion VGG19 Network for Characterising Myocardial Perfusion Imaging SPECT Polar Maps in Patients with Suspected Coronary Artery Disease

Ioannis D. Apostolopoulos, Nikolaοs D. Papathanasiou, Nikolaos Papandrianos, Elpiniki Papageorgiou, Dimitris J. Apostolopoulos

Applied Sciences Vol. 13, No. 15, pp. 8839 10.3390/app13158839

2023 year

Prediction of the Concentration and Source Contributions of PM2.5 and Gas-Phase Pollutants in an Urban Area with the SmartAQ Forecasting System

Evangelia Siouti, Ksakousti Skyllakou, Ioannis Kioutsioukis, David Patoulias, Ioannis D. Apostolopoulos, George Fouskas, Spyros N. Pandis

Atmosphere Vol. 15, No. 1, pp. 8 10.3390/atmos15010008

2023 year

Uncovering the Black Box of Coronary Artery Disease Diagnosis: The Significance of Explainability in Predictive Models

Agorastos-Dimitrios Samaras, Serafeim Moustakidis, Ioannis D. Apostolopoulos, Elpiniki Papageorgiou, Nikolaos Papandrianos

Applied Sciences Vol. 13, No. 14, pp. 8120 10.3390/app13148120

2022 year

A Deep Learning Methodology for the Detection of Abnormal Parathyroid Glands via Scintigraphy with 99mTc-Sestamibi

Ioannis D. Apostolopoulos, Nikolaos D. Papathanasiou, Dimitris J. Apostolopoulos

Diseases Vol. 10, No. 3, pp. 56 10.3390/diseases10030056

2022 year

An Explainable Classification Method of SPECT Myocardial Perfusion Images in Nuclear Cardiology Using Deep Learning and Grad-CAM

Nikolaos I. Papandrianos, Anna Feleki, Serafeim Moustakidis, Elpiniki I. Papageorgiou, Ioannis D. Apostolopoulos, Dimitris J. Apostolopoulos

Applied Sciences Vol. 12, No. 15, pp. 7592 10.3390/app12157592

2022 year

An Explainable Deep Learning Framework for Detecting and Localising Smoke and Fire Incidents: Evaluation of Grad-CAM++ and LIME

Ioannis D. Apostolopoulos, Ifigeneia Athanasoula, Mpesi Tzani, Peter P. Groumpos

Machine Learning and Knowledge Extraction Vol. 4, No. 4, pp. 1124-1135 10.3390/make4040057

2022 year

Applications of Generative Adversarial Networks (GANs) in Positron Emission Tomography (PET) imaging: A review

Ioannis D. Apostolopoulos, Nikolaos D. Papathanasiou, Dimitris J. Apostolopoulos, George S. Panayiotakis

European Journal of Nuclear Medicine and Molecular Imaging Vol. 49, No. 11, pp. 3717-3739 10.1007/s00259-022-05805-w

2022 year

Artificial Intelligence Methods for Identifying and Localizing Abnormal Parathyroid Glands: A Review Study

Ioannis D. Apostolopoulos, Nikolaos I. Papandrianos, Elpiniki I. Papageorgiou, Dimitris J. Apostolopoulos

Machine Learning and Knowledge Extraction Vol. 4, No. 4, pp. 814-826 10.3390/make4040040

2022 year

Deep learning exploration for SPECT MPI polar map images classification in coronary artery disease

Nikolaos I. Papandrianos, Ioannis D. Apostolopoulos, Anna Feleki, Dimitris J. Apostolopoulos, Elpiniki I. Papageorgiou

Annals of Nuclear Medicine Vol. 36, No. 9, pp. 823-833 10.1007/s12149-022-01762-4

2022 year
2022 year

Detection and Localisation of Abnormal Parathyroid Glands: An Explainable Deep Learning Approach

Dimitris J. Apostolopoulos, Ioannis D. Apostolopoulos, Nikolaos D. Papathanasiou, Trifon Spyridonidis, George S. Panayiotakis

Algorithms Vol. 15, No. 12, pp. 455 10.3390/a15120455

2021 year

Advanced fuzzy cognitive maps: state-space and rule-based methodology for coronary artery disease detection

Ioannis D Apostolopoulos, Peter P Groumpos, Dimitris J Apostolopoulos

Biomedical Physics & Engineering Express Vol. 7, No. 4, pp. 045007 10.1088/2057-1976/abfd83

2021 year

Automatic classification of solitary pulmonary nodules in PET/CT imaging employing transfer learning techniques

Ioannis D. Apostolopoulos, Emmanuel G. Pintelas, Ioannis E. Livieris, Dimitris J. Apostolopoulos, Nikolaos D. Papathanasiou, Panagiotis E. Pintelas, George S. Panayiotakis

Medical & Biological Engineering & Computing Vol. 59, No. 6, pp. 1299-1310 10.1007/s11517-021-02378-y

2021 year

Classification of lung nodule malignancy in computed tomography imaging utilising generative adversarial networks and semi-supervised transfer learning

Ioannis D. Apostolopoulos, Nikolaos D. Papathanasiou, George S. Panayiotakis

Biocybernetics and Biomedical Engineering Vol. 41, No. 4, pp. 1243-1257 10.1016/j.bbe.2021.08.006

2021 year
2021 year

Multi-Input Deep Learning Approach for Cardiovascular Disease Diagnosis using Myocardial Perfusion Imaging and Clinical Data

Ioannis D. Apostolopoulos, Dimitris I. Apostolopoulos, Trifon I. Spyridonidis, Nikolaos D. Papathanasiou, George S. Panayiotakis

Physica Medica 10.1016/j.ejmp.2021.04.011

2020 year

Automatic characterization of myocardial perfusion imaging polar maps employing deep learning and data augmentation

Ioannis D. Apostolopoulos, Nikolaos D Papathanasiou, Trifon Spyridonidis, Dimitris J Apostolopoulos

Hellenic Journal of Nuclear Medicine 10.1967/s002449912101

2020 year

Covid-19: automatic detection from X-ray images utilizing transfer learning with convolutional neural networks

Ioannis D. Apostolopoulos, Tzani A. Mpesiana

Physical and Engineering Sciences in Medicine Vol. 43, No. 2, pp. 635-640 10.1007/s13246-020-00865-4

2020 year

Extracting Possibly Representative COVID-19 Biomarkers from X-ray Images with Deep Learning Approach and Image Data Related to Pulmonary Diseases

Ioannis D. Apostolopoulos, Sokratis I. Aznaouridis, Mpesiana A. Tzani

Journal of Medical and Biological Engineering Vol. 40, No. 3, pp. 462-469 10.1007/s40846-020-00529-4

2020 year

Non – invasive modelling methodology for the diagnosis of coronary artery disease using fuzzy cognitive maps

Ioannis D. Apostolopoulos, Peter P. Groumpos

Computer Methods in Biomechanics and Biomedical Engineering Vol. 23, No. 12, pp. 879-887 10.1080/10255842.2020.1768534

2013 year

Diagnostics

Ioannis D. Apostolopoulos, Nikolaos D. Papathanasiou, Nikolaos I. Papandrianos, Elpiniki I. Papageorgiou and George S. Panayiotakis

Diagnostics 10.3390/diagnostics

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