archimedes-Artificial Intelligence, Data Science, Algorithms-greece

 
Artificial Intelligence
 
Data Science
 
Algorithms

[Archimedes Talks] A deep learning-powered right ventricle counterpart of the Simpson’s method of discs and uncertainty quantification

Dates
2025-01-10 13:30 - 14:30
Venue
Artemidos 1 - Amphitheater

Title: A deep learning-powered right ventricle counterpart of the Simpson’s method of discs and uncertainty quantification


Speaker: Archontis Giannakidis, Assistant Professor, School of Science and Technology at Nottingham Trent University (NTU), UK


Abstract: Quantitative evaluation of right ventricular (RV) volumes is of paramount importance in many cardiovascular conditions and is best performed by cardiovascular magnetic resonance imaging (CMR). However, CMR scanners are scarce, costly, and lack portability. Two-dimensional transthoracic echocardiography (2DE) allows for the widely available, low cost and bedside evaluation of RV size and function. 2DE-based quantitative RV analysis is nevertheless restricted by the lack of accurate models of the complex RV shape. In this talk, a feature tokeniser transformer-based model will be presented to calculate the RV end-diastolic (ED) and end-systolic (ES) volumes by relying on tabular data. The proposed method mirrors the Simpson’s method of discs applied to the left ventricular volume calculation task in the sense that it uses area data from various standardised 2DE views (along with age, cardiac phase and gender information) as inputs to the regression model. The pipeline is trained and tested on a small-scale dataset, showing feasibility and promising accuracy.

In the second part of the talk, an instance-based method will be presented for complementing ensemble method-based RV volume predictions with uncertainty scores. The technique will rely on the learned tree structure to identify the nearest training samples to a target instance and then use a number of distribution types to more flexibly model the output. The appropriateness of the proposed framework will be showcased by providing exemplar cases. The estimated uncertainty embodies both aleatoric and epistemic types. This work aligns with trustworthy artificial intelligence since it can be used to enhance the decision-making process and reduce risks. Lastly, the feature importance scores of our framework can be exploited to reduce the number of required 2DE views which could enhance the proposed pipeline’s clinical application.

Bio: Archontis Giannakidis is currently an Assistant Professor in Data Science with the School of Science and Technology at Nottingham Trent University (NTU), UK. Before NTU, Archontis was a Postdoctoral Researcher with the National Heart and Lung Institute at Imperial College London, London, UK (4 years) and the Life Sciences Division at Lawrence Berkeley National Laboratory, Berkeley, CA, USA (3 years). He received his PhD in Electronic Engineering (Inverse Problems) from University of Surrey, UK, where he was advised by Prof. Maria Petrou. He works on the mathematical underpinnings of machine learning and data science, with a special focus on Responsible AI. His research interests lie in the intelligent processing of large amounts of various types of data towards: (i) learning efficient data representations, (ii) revealing hidden patterns in the data, (iii) automating intellectual tasks normally performed by humans, (iv) optimising decision-making, and (v) improving computational modelling of complex systems. Archontis is a member of the special interests group on “Machine Learning and Dynamical Systems” at the Alan Touring Institute. He has gained funding from Innovate UK/EPSRC and the Government Equalities Office, and he holds an international patent for co-inventing a deep learning-based quantitative technique for analysing the right ventricle by relying only on two-dimensional echocardiography.





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Vision

To position Greece as a leading player in AI and Data Science

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Mission

To build an AI Excellence Hub in Greece where the international research community can connect, groundbreaking ideas can thrive, and the next generation of scientists emerges, shaping a brighter future for Greece and the world

 

Welcome to ARCHIMEDES, a vibrant research hub connecting the global AI and Data Science research community fostering groundbreaking research in Greece and beyond. Its dedicated core team, comprising lead researchers, affiliated researchers, Post-Docs, PhDs and interns, is committed to advancing basic and applied research in Artificial Intelligence and its supporting disciplines, including Algorithms, Statistics, Learning Theory, and Game Theory organized around 6 core research areas. By collaborating with Greek and Foreign Universities and Research Institutes, ARCHIMEDES disseminates its research findings fostering knowledge exchange and providing enriching opportunities for students. Leveraging AI to address real-world challenges, ARCHIMEDES promotes innovation within the Greek ecosystem and extends its societal impact. Established in January 2022, as a research unit of the Athena Research Center with support from the Committee Greece 2021, ARCHIMEDES is funded for its first four years by the EU Recovery and Resilience Facility (RRF).

 
 

NEWS

 
John von Neumann Theory Prize to Christos Papadimitriou and Mihalis Yannakakis

John von Neumann Theory Prize to Christos Papadimitriou and Mihalis Yannakakis

Computer Science Professor and Principal Scientist of ARCHIMEDES Unit of the Athena Research Center Christos Papadimitriou and Computer Science Professor and Member of the Scientific Board of ARCHIMEDES Mihalis Yannakakis received the John von Neumann Theory Prize for their research in computational complexity theory that explores the boundaries of efficiently solving decision and optimization problems crucial to operations research and management sciences.  You may read more information here.

Memorandum of Understanding with The Smile of the Child

Memorandum of Understanding with The Smile of the Child

On December 4, 2024, Professor Ioannis Emiris, Chairman of the Board and General Director of Athena Research Center, and Mr. Kostas Giannopoulos, Chairman of the Board of the Organization "The Smile of the Child," signed a Memorandum of Understanding. The Memorandum outlines the establishment of a long-term partnership between the Athena Research Center and "The Smile of the Child," aiming to improve children's quality of life, raise awareness, and educate them about their rights.

Archimedes in AI in Action!

Archimedes in AI in Action!

Archimedes was recently featured in the article “The importance of Artificial Intelligence” in the national Sunday newspaper, To Vima, as part of their "AI in Action" magazine, which explored cutting-edge AI applications in Greece.

Archimedes at Athena Forum 2024

Archimedes at Athena Forum 2024

Archimedes was recognized as a prime example of a successful research hub advancing AI research in Greece in the highly successful Athena Forum 2024.  Archimedes Director Timos Sellis led the panel discussion "Big Data and Life Sciences" which explored the transformative impact of data science on scientific research, drug development, and clinical practices. The discussion also underscored the pivotal role of data scientists in shaping the future of biosciences and healthcare.

Successful Conclusion of the 1st Workshop on Responsible Artificial Intelligence (ReAI) at SETN 2024

Successful Conclusion of the 1st Workshop on Responsible Artificial Intelligence (ReAI) at SETN 2024

The Archimedes, AI and Data Science Research Hub at the Athena Research Center proudly supported the 1st Workshop on Responsible Artificial Intelligence (ReAI), which took place on September 12, 2024, at the University of Piraeus during SETN 2024, the 13th Conference on Artificial Intelligence, organised by the Hellenic Artificial Intelligence Society (EETN). The event brought together AI researchers, industry experts, and policymakers for a comprehensive discussion on the ethical, legal, and societal responsibilities involved in the development and deployment of AI systems.

 
 

The project “ARCHIMEDES Unit: Research in Artificial Intelligence, Data Science and Algorithms” with code OPS 5154714 is implemented by the National Recovery and Resilience Plan “Greece 2.0” and is funded by the European Union – NextGenerationEU.

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