George K Matsopoulos

Summary

Affiliation: National Technical University of Athens
Country: Greece

Publications

  1. ncbi request reprint A computer-aided diagnostic system to characterize CT focal liver lesions: design and optimization of a neural network classifier
    Miltiades 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
  2. ncbi request reprint Thoracic non-rigid registration combining self-organizing maps and radial basis functions
    George 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
  3. pmc Feasibility and radiation induced toxicity regarding the first application of transperineal implementation of biocompatible balloon for high dose radiotherapy in patients with prostate carcinoma
    Vassilis Kouloulias
    2nd Department of Radiology, Radiotherapy Unit, Attikon University Hospital, Xaidari, Greece
    Radiat Oncol 8:82. 2013
  4. doi request reprint Medical imaging correction: a comparative study of five contrast and brightness matching methods
    G 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
  5. pmc Volumetric difference evaluation of registered three-dimensional pre-operative and post-operative CT dental data
    T L Economopoulos
    National Technical University of Athens, Greece
    Dentomaxillofac Radiol 41:328-39. 2012
  6. doi request reprint Detection of glaucomatous change based on vessel shape analysis
    George 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
  7. ncbi request reprint Image registration based on lifting process: an application to digital subtraction radiography
    George K Matsopoulos
    Institute of Communication and Computer Systems, National Technical University of Athens, Greece
    IEEE Trans Inf Technol Biomed 10:763-74. 2006
  8. ncbi request reprint Registration of electronic portal images for patient set-up verification
    George 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
  9. ncbi request reprint MITIS: a WWW-based medical system for managing and processing gynecological-obstetrical-radiological data
    George 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
  10. ncbi request reprint CT-MRI automatic surface-based registration schemes combining global and local optimization techniques
    George 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

Collaborators

Detail Information

Publications31

  1. ncbi request reprint A computer-aided diagnostic system to characterize CT focal liver lesions: design and optimization of a neural network classifier
    Miltiades 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...
  2. ncbi request reprint Thoracic non-rigid registration combining self-organizing maps and radial basis functions
    George 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...
  3. pmc Feasibility and radiation induced toxicity regarding the first application of transperineal implementation of biocompatible balloon for high dose radiotherapy in patients with prostate carcinoma
    Vassilis Kouloulias
    2nd Department of Radiology, Radiotherapy Unit, Attikon University Hospital, Xaidari, Greece
    Radiat Oncol 8:82. 2013
    ..To evaluate the feasibility of the transperineal implementation of biocompatible balloon (Prospace) and the acute toxicity of high dose 3DCRT in patients with localized low risk prostate cancer...
  4. doi request reprint Medical imaging correction: a comparative study of five contrast and brightness matching methods
    G 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...
  5. pmc Volumetric difference evaluation of registered three-dimensional pre-operative and post-operative CT dental data
    T L Economopoulos
    National Technical University of Athens, Greece
    Dentomaxillofac Radiol 41:328-39. 2012
    ....
  6. doi request reprint Detection of glaucomatous change based on vessel shape analysis
    George 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...
  7. ncbi request reprint Image registration based on lifting process: an application to digital subtraction radiography
    George 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...
  8. ncbi request reprint Registration of electronic portal images for patient set-up verification
    George 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
    ....
  9. ncbi request reprint MITIS: a WWW-based medical system for managing and processing gynecological-obstetrical-radiological data
    George 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...
  10. ncbi request reprint CT-MRI automatic surface-based registration schemes combining global and local optimization techniques
    George 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
    ....
  11. ncbi request reprint Effect of frequency deviance direction on performance and mismatch negativity
    Irene 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
    ....
  12. ncbi request reprint Artificial immune network for automatic point correspondence in medical images
    Konstantinos 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...
  13. doi request reprint Classification of hysteroscopical images using texture and vessel descriptors
    Alexandra A Vlachokosta
    School of Electrical and Computer Engineering, National Technical University of Athens, 9 Iroon Polytechniou Str, Zografou Campus, 15780 Athens, Greece
    Med Biol Eng Comput 51:859-67. 2013
    ..The images were classified into three categories using artificial neural networks and the reported classification accuracy was 91.2 %, while the specificity and sensitivity were 83.8 and 93.6 % respectively. ..
  14. pmc Behavioral and brain pattern differences between acting and observing in an auditory task
    Irene 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:..
  15. ncbi request reprint Fractal dimension estimation of carotid atherosclerotic plaques from B-mode ultrasound: a pilot study
    Pantelis 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...
  16. doi request reprint An iterative point correspondence algorithm for automatic image registration: an application to dental subtraction radiography
    Vasiliki 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...
  17. doi request reprint Computer-aided diagnosis of thyroid malignancy using an artificial immune system classification algorithm
    Konstantinos 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...
  18. doi request reprint Application of Kohonen network for automatic point correspondence in 2D medical images
    Vasiliki E Markaki
    School of Electrical and Computer Engineering, National Technical University of Athens, Athens, Greece
    Comput Biol Med 39:630-45. 2009
    ....
  19. pmc Mismatch task conditions and error related ERPs
    Irene 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...
  20. ncbi request reprint A decision support system for assisting fine needle aspiration diagnosis of thyroid malignancy
    Emmanouil 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...
  21. pmc ESTERR-PRO: a setup verification software system using electronic portal imaging
    Pantelis 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)...
  22. doi request reprint A classification system based on a new wrapper feature selection algorithm for the diagnosis of primary and secondary polycythemia
    Vasileios Ch Korfiatis
    School of Electrical and Computer Engineering, National Technical University of Athens, Greece
    Comput Biol Med 43:2118-26. 2013
    ..9% overall accuracy at the first classification level and up to 96.6% at the second classification level. Moreover, it provides excellent robustness regardless of the size of the input feature subset used. ..
  23. ncbi request reprint Classification of histological images of the endometrium using texture features
    Alexandra A Vlachokosta
    School of Electrical and Computer Engineering, National Technical University of Athens, Greece
    Anal Quant Cytol Histol 35:105-13. 2013
    ..To present a texture analysis method in order to achieve texture classification for 240 histological images of the endometrium...
  24. doi request reprint 3D identification of trabecular bone fracture zone using an automatic image registration scheme: A validation study
    Simone 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...
  25. pmc Classification of event-related potentials associated with response errors in actors and observers based on autoregressive modeling
    Christos 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...
  26. doi request reprint A new method for gridding DNA microarrays
    Christoforos C Charalambous
    School of Electrical and Computer Engineering, National Technical University of Athens, Greece
    Comput Biol Med 43:1303-12. 2013
    ..According to the obtained results, the proposed gridding scheme outperforms both methods, qualitatively and quantitatively...
  27. doi request reprint The micro-structure of bone trabecular fracture: an inter-site study
    Simone Tassani
    Institute of Communication and Computer System, National Technical University of Athens, 9 Iroon Polytechniou Street, 157 80 Zografou, Athens, Greece Electronic address
    Bone 60:78-86. 2014
    ....
  28. ncbi request reprint 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...
  29. ncbi request reprint Use of image processing techniques to assess effect of disodium pamidronate in conjunction with radiotherapy in patients with bone metastases
    Vassilios 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...
  30. ncbi request reprint Multimodal registration of retinal images using self organizing maps
    George 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...
  31. ncbi request reprint A comparative study of surface- and volume-based techniques for the automatic registration between CT and SPECT brain images
    George 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...