Research Topics
| George K MatsopoulosSummaryAffiliation: National Technical University of Athens Country: Greece Publications
| Collaborators
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Detail Information
Publications
A computer-aided diagnostic system to characterize CT focal liver lesions: design and optimization of a neural network classifierMiltiades Gletsos
Laboratory of Biomedical Simulation and Imaging, Faculty of Electrical and Computer Engineering, National Technical University of Athens, 15773 Athens, Greece
IEEE Trans Inf Technol Biomed 7:153-62. 2003..The comparative study of the above dimensionality reduction methods shows that genetic algorithms result in lower dimension feature vectors and improved classification performance...- Thoracic non-rigid registration combining self-organizing maps and radial basis functionsGeorge K Matsopoulos
Institute of Communications and Computer Systems, National Technical University of Athens, 9, Iroon Polytechniou Street, Zografos, Athens 157 80, Greece
Med Image Anal 9:237-54. 2005..Thus, the practical implementation of this scheme could provide estimations of lung tumor volumes during radiotherapy treatment planning... 
Medical imaging correction: a comparative study of five contrast and brightness matching methodsG K Matsopoulos
Department of Electrical and Computer Engineering, National Technical University of Athens, 9 Iroon Polytechniou Street, 157 80 Zografou, Athens, Greece
Comput Methods Programs Biomed 106:308-27. 2012..Following qualitative and quantitative analysis, it was deduced that the Histogram Registration method systematically outperformed the other four methods in comparison in most cases on average...- Volumetric difference evaluation of registered three-dimensional pre-operative and post-operative CT dental dataT L Economopoulos
National Technical University of Athens, Greece
Dentomaxillofac Radiol 41:328-39. 2012.... - Detection of glaucomatous change based on vessel shape analysisGeorge K Matsopoulos
Department of Electrical and Computer Engineering, National Technical University of Athens, 9, Iroon Polytechniou Street, Zografos, 15780 Athens, Greece
Comput Med Imaging Graph 32:183-92. 2008..5%, underscoring the value of the proposed system to assist in the detection of early glaucomatous change... - Image registration based on lifting process: an application to digital subtraction radiographyGeorge K Matsopoulos
Institute of Communication and Computer Systems, National Technical University of Athens, Greece
IEEE Trans Inf Technol Biomed 10:763-74. 2006..Finally, the proposed registration method has been further improved in terms of execution time by the implementation of a surface decimation process... - Registration of electronic portal images for patient set-up verificationGeorge K Matsopoulos
Institute of Communication and Computer Systems, National Technical University of Athens, 9, Iroon Polytechniou Str, Zografos, 15780 Athens, Greece
Phys Med Biol 49:3279-89. 2004.... - MITIS: a WWW-based medical system for managing and processing gynecological-obstetrical-radiological dataGeorge K Matsopoulos
Institute of Communication and Computer Systems, National Technical University of Athens, 9, Iroon Polytechneiou Str, Zografos, Athens 157 80, Greece
Comput Methods Programs Biomed 76:53-71. 2004..MITIS is composed as a set of independent WWW modules (ISAPI server extension dlls) and a Win32 application (COM+ server) for mammography image processing and evaluation... - CT-MRI automatic surface-based registration schemes combining global and local optimization techniquesGeorge K Matsopoulos
Institute of Communication and Computer Systems, Department of Electrical and Computer Engineering, National Technical University of Athens, Greece
Technol Health Care 11:219-32. 2003.... - Effect of frequency deviance direction on performance and mismatch negativityIrene S Karanasiou
Institute of Communications and Computer Systems, School of Electrical and Computer Engineering, National Technical University of Athens, 1st Department of Psychiatry, Eginition Hospital, Greece
J Integr Neurosci 10:525-36. 2011.... - Artificial immune network for automatic point correspondence in medical imagesKonstantinos K Delibasis
Institute of Communication and Computer Systems, Greece
Conf Proc IEEE Eng Med Biol Soc 2007:840-3. 2007..Qualitative and quantitative results presented from in vitro radiographic dental images with synthetic deformations, show that the proposed algorithm outperforms the template matching for automatic point correspondence... 
Behavioral and brain pattern differences between acting and observing in an auditory taskIrene S Karanasiou
Institute of Communications and Computer Systems, National Technical University of Athens, 9, Iroon Polytechneiou Str, 157 73 Zografou Campus, Athens, Greece
Behav Brain Funct 5:5. 2009..abstract:..- Fractal dimension estimation of carotid atherosclerotic plaques from B-mode ultrasound: a pilot studyPantelis Asvestas
Biomedical Simulations and Medical Imaging Group, Department of Electrical and Computer Engineering, National Technical University of Athens, Zografos, Greece
Ultrasound Med Biol 28:1129-36. 2002..The presented pilot study suggests that the fractal dimension, estimated by the proposed method, could be used as a single determinant for the discrimination of symptomatic and asymptomatic subjects... - Application of Kohonen network for automatic point correspondence in 2D medical imagesVasiliki E Markaki
School of Electrical and Computer Engineering, National Technical University of Athens, Athens, Greece
Comput Biol Med 39:630-45. 2009.... - Computer-aided diagnosis of thyroid malignancy using an artificial immune system classification algorithmKonstantinos K Delibasis
National Technical University of Athens, Athens 15780, Greece
IEEE Trans Inf Technol Biomed 13:680-6. 2009..5% accuracy. Furthermore, 24% of the cases that are characterized as "suspicious" by FNA and are histologically proven nonmalignancies have been classified correctly... - An iterative point correspondence algorithm for automatic image registration: an application to dental subtraction radiographyVasiliki E Markaki
School of Electrical and Computer Engineering, National Technical University of Athens, 9 Iroon Polytechniou Street, 157 80 Zografou, Athens, Greece
Comput Methods Programs Biomed 93:61-72. 2009..The proposed AIPC algorithm was applied on 113 in vitro and in vivo dental image pairs providing improved registration accuracy against three widely used registration methods... - Mismatch task conditions and error related ERPsIrene S Karanasiou
Institute of Communications and Computer Systems, National Technical University of Athens, 9, Iroon Polytechneiou Str, 15773 Zografou Campus, Athens, Greece
Behav Brain Funct 6:14. 2010..The aim of the present work was to study the effect of mismatch conditions on the subjects' responses in an auditory identification task and their relation to the N200 of stimulus-locked ERPs... - A decision support system for assisting fine needle aspiration diagnosis of thyroid malignancyEmmanouil A Zoulias
Department of Electrical and Computer Engineering, National Technical University of Athens, Athens, Greece
Anal Quant Cytol Histol 33:215-22. 2011..To assist diagnosis of thyroid malignancy, implementing a decision support system (DSS) using fine needle aspiration biopsy (FNAB) data... 
ESTERR-PRO: a setup verification software system using electronic portal imagingPantelis A Asvestas
Institute of Communication and Computer Systems, National Technical University of Athens, 9 Iroon Polytechniou Street, Zografos, Athens 15780, Greece
Int J Biomed Imaging 2007:61523. 2007..Furthermore, statistical analysis by means of the Wilcoxon nonparametric signed test showed that the results that were obtained by the two methods did not differ significantly (P value >0.05)...- 3D identification of trabecular bone fracture zone using an automatic image registration scheme: A validation studySimone Tassani
Institute of Communication and Computer System, National Technical University of Athens, 9 Iroon Polytechniou Street, 157 80 Zografou, Athens, Greece
J Biomech 45:2035-40. 2012..Furthermore, "full 3D" fracture zone identification, based on the presented scheme, was proposed. The proposed scheme proved to be more accurate and significantly faster than the currently used visual process... - Classification of event-related potentials associated with response errors in actors and observers based on autoregressive modelingChristos E Vasios
Institute of Communications and Computer Systems, National Technical University of Athens, Athens, Greece
Open Med Inform J 3:32-43. 2009..The proposed ERP-signal classification method provides a promising tool to study error detection and observational-learning mechanisms in performance monitoring and joint-action research, in both healthy and patient populations... - Do atypical antipsychotics fail to exert cognitive sparing effects?Charalabos Papageorgiou
Department of Psychiatry, Egnition Hospital, University of Athens, Athens, Greece
Neuroreport 14:505-9. 2003..The present study also casts doubts regarding the cognitive sparing effect of atypical antipsychotics, despite the fact that they mediate symptom improvement... - Use of image processing techniques to assess effect of disodium pamidronate in conjunction with radiotherapy in patients with bone metastasesVassilios E Kouloulias
Department of Radiology, Areteion University Hospital, Athens, Greece
Acta Oncol 41:169-74. 2002..These findings indicate an important increase in bone mass and bone formation, which the radiologists found difficult to identify visually... - Multimodal registration of retinal images using self organizing mapsGeorge K Matsopoulos
IEEE Trans Med Imaging 23:1557-63. 2004..The proposed registration algorithm was tested on 24 multimodal retinal pairs and the obtained results show an advantageous performance in terms of accuracy with respect to the manual registration... - A comparative study of surface- and volume-based techniques for the automatic registration between CT and SPECT brain imagesGeorge C Kagadis
Department of Medical Physics, School of Medicine, University of Patras, Rion, Greece
Med Phys 29:201-13. 2002..05, Neuman Keuls test) and the surface-based technique (p<0.05, Neuman-Keuls test). Surface-based registration and ICP do not differ significantly in performance...