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Mavridis C, Economopoulos TL, Benetos G, Matsopoulos GK. Aorta Segmentation in 3D CT Images by Combining Image Processing and Machine Learning Techniques. Cardiovasc Eng Technol 2024:10.1007/s13239-024-00720-7. [PMID: 38388764 DOI: 10.1007/s13239-024-00720-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2023] [Accepted: 01/30/2024] [Indexed: 02/24/2024]
Abstract
PURPOSE Aorta segmentation is extremely useful in clinical practice, allowing the diagnosis of numerous pathologies, such as dissections, aneurysms and occlusive disease. In such cases, image segmentation is prerequisite for applying diagnostic algorithms, which in turn allow the prediction of possible complications and enable risk assessment, which is crucial in saving lives. The aim of this paper is to present a novel fully automatic 3D segmentation method, which combines basic image processing techniques and more advanced machine learning algorithms, for detecting and modelling the aorta in 3D CT imaging data. METHODS An initial intensity threshold-based segmentation procedure is followed by a classification-based segmentation approach, based on a Markov Random Field network. The result of the proposed two-stage segmentation process is modelled and visualized. RESULTS The proposed methodology was applied to 16 3D CT data sets and the extracted aortic segments were reconstructed as 3D models. The performance of segmentation was evaluated both qualitatively and quantitatively against other commonly used segmentation techniques, in terms of the accuracy achieved, compared to the actual aorta, which was defined manually by experts. CONCLUSION The proposed methodology achieved superior segmentation performance, compared to all compared segmentation techniques, in terms of the accuracy of the extracted 3D aortic model. Therefore, the proposed segmentation scheme could be used in clinical practice, such as in treatment planning and assessment, as it can speed up the evaluation of the medical imaging data, which is commonly a lengthy and tedious process.
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Affiliation(s)
- Christos Mavridis
- Department of Electrical and Computer Engineering, National Technical University of Athens, 15780, Athens, Greece.
| | - Theodore L Economopoulos
- Department of Electrical and Computer Engineering, National Technical University of Athens, 15780, Athens, Greece
| | - Georgios Benetos
- Department of CT and MRI, Lefkos Stavros Clinic, 11528, Athens, Greece
| | - George K Matsopoulos
- Department of Electrical and Computer Engineering, National Technical University of Athens, 15780, Athens, Greece
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Moussa Y, Shuster J, Matte G, Sullivan A, Mavridis C, Ben-Shoshan M, Pfeiffer U, Baldini G, Bondy R, Carli F, Tsoukas C. COMPARATIVE STUDY OF βS-LACTAM DE-LABELING ON THE FREQUENCY OF PERI-OPERATIVE VANCOMYCIN USE. Ann Allergy Asthma Immunol 2018. [DOI: 10.1016/j.anai.2018.09.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Georgiadis G, Mavridis C, Belantis C, Zisis IE, Skamagkas I, Fragkiadoulaki I, Heretis I, Tzortzis V, Psathakis K, Tsatsakis A, Mamoulakis C. Nephrotoxicity issues of organophosphates. Toxicology 2018; 406-407:129-136. [PMID: 30063941 DOI: 10.1016/j.tox.2018.07.019] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2018] [Revised: 07/15/2018] [Accepted: 07/25/2018] [Indexed: 12/12/2022]
Abstract
Organophosphates are a large class of chemicals, initially invented in 1850 and since then they have been applied in numerous aspects of science to serve our purposes. Their mechanism of action in living organisms involves the irreversible inhibition of acetylcholinesterase, therefore they interfere with neuromuscular signal transmission. Due to the systematic and exaggerated use of these chemicals, there is massive exposure to them, hence there is great concern regarding the ramifications to all mammalian organisms. It has been widely accepted that over-exposure to organophosphates, has a deleterious impact on the renal tissue and subsequently on the renal function. Despite the significance of this global issue, limited knowledge exists, regarding the effect of these substances on our health. Therefore, new and extensive research is required to expand our knowledge and ensure proper guidance regarding the use of organophosphates as well the protection against their detrimental consequences. The aim of this review is to negotiate the effect of organophosphate exposure on renal tissue and kidney function.
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Affiliation(s)
- G Georgiadis
- Department of Urology, University General Hospital of Heraklion, University of Crete, Medical School, Heraklion, Crete, Greece
| | - C Mavridis
- Department of Urology, University General Hospital of Heraklion, University of Crete, Medical School, Heraklion, Crete, Greece
| | - C Belantis
- Department of Urology, University General Hospital of Heraklion, University of Crete, Medical School, Heraklion, Crete, Greece
| | - I E Zisis
- Department of Urology, University General Hospital of Heraklion, University of Crete, Medical School, Heraklion, Crete, Greece
| | - I Skamagkas
- Department of Urology, University General Hospital of Heraklion, University of Crete, Medical School, Heraklion, Crete, Greece
| | - I Fragkiadoulaki
- Department of Urology, University General Hospital of Heraklion, University of Crete, Medical School, Heraklion, Crete, Greece; Department of Forensic Sciences and Toxicology, University of Crete, Medical School, Heraklion, Crete, Greece
| | - I Heretis
- Department of Urology, University General Hospital of Heraklion, University of Crete, Medical School, Heraklion, Crete, Greece
| | - V Tzortzis
- Department of Urology, University of Thessaly, Larissa, Greece
| | - K Psathakis
- Department of Forensic Sciences and Toxicology, University of Crete, Medical School, Heraklion, Crete, Greece
| | - A Tsatsakis
- Department of Forensic Sciences and Toxicology, University of Crete, Medical School, Heraklion, Crete, Greece.
| | - C Mamoulakis
- Department of Urology, University General Hospital of Heraklion, University of Crete, Medical School, Heraklion, Crete, Greece
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Georgiadis G, Zisis I, Mpelantis C, Mavridis C, Skamagkas C, Heretis I, Mamoulakis C. Our experience in retrograde intra renal surgery with a single-use digital flexible ureteroscope in a tertiary academic endourological center. ACTA ACUST UNITED AC 2018. [DOI: 10.1016/s1569-9056(18)32520-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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Pompei G, Raspa V, Mavridis C, Davolio Marani S, Bellelli V, Aldrovandi S. [Dorsal defect of the patella]. Radiol Med 1991; 82:159-61. [PMID: 1896571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- G Pompei
- Servizio di Radiologia, Ospedale di Vignola, Vignola, Modena
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