Πλοήγηση ανά Συγγραφέα "Theodorou, K."
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Differentiation of glioblastoma multiforme from metastatic brain tumor using proton magnetic resonance spectroscopy, diffusion and perfusion metrics at 3 T
Tsougos, I.; Svolos, P.; Kousi, E.; Fountas, K.; Theodorou, K.; Fezoulidis, I.; Kapsalaki, E. (2012)Purpose: To assess the contribution of H-1-magnetic resonance spectroscopy (H-1-MRS), diffusion-weighted imaging (DWI), diffusion tensor imaging (DTI) and dynamic susceptibility contrast-enhanced (DSCE) imaging metrics in ... -
Distinct peak at 3.8 ppm observed by 3T MR spectroscopy in meningiomas, while nearly absent in high-grade gliomas and cerebral metastases
Kousi, E.; Tsougos, I.; Fountas, K.; Theodorou, K.; Tsolaki, E.; Fezoulidis, I.; Kapsalaki, E. (2012)The purpose of the present study was to evaluate distinct metabolic features of meningiomas to distinguish them from other brain lesions using proton magnetic resonance spectroscopy. The study was performed on 17 meningiomas, ... -
Dose calculation optimization in intracranial stereotactic radiotherapy using implicit surface modeling
Kilindris, T.; Theodorou, K. (2009)Intracranial Stereotactic radiotherapy / radiosurgery utilize fractioned dose delivery through multiple noncoplanar arcs to avoid harm of normal tissue. Proper positioning of the arcs in respect to avoid Organs at Risk ... -
Dosimetric and radiobiological evaluation of dose distribution perturbation due to head heterogeneities for Linac and Gamma Knife stereotactic radiotherapy
Theodorou, K.; Stathakis, S.; Lind, B.; Kappas, C. (2008)Introduction. In SRT/SRS, dedicated treatment planning systems are used for the calculation of the dose distribution. The majority of these systems utilize the standard TMR/OAR formalism for dose calculation as well as ... -
Efficacy of rifampicin in the treatment of experimental acute canine monocytic ehrlichiosis
Theodorou, K.; Mylonakis, M. E.; Siarkou, V. I.; Leontides, L.; Koutinas, A. F.; Koutinas, C. K.; Kritsepi-Konstantinou, M.; Batzias, G.; Flouraki, E.; Eyal, O.; Kontos, V.; Harrus, S. (2013)To assess the efficacy of rifampicin in achieving clinical and haematological recovery and clearing infection in dogs with experimentally induced acute monocytic ehrlichiosis. Five Ehrlichia canis-infected Beagle dogs were ... -
Evaluation of dose-response models and parameters predicting radiation induced pneumonitis using clinical data from breast cancer radiotherapy
Tsougos, I.; Mavroidis, P.; Rajala, J.; Theodorou, K.; Jarvenpaa, R.; Pitkanen, M. A.; Holli, K.; Ojala, A. T.; Lind, B. K.; Hyodynmaa, S.; Kappas, C. (2005)The purpose of this work is to evaluate the predictive strength of the relative seriality, parallel and LKB normal tissue complication probability (NTCP) models regarding the incidence of radiation pneumonitis, in a large ... -
Fast spectroscopic multiple analysis (FASMA) for brain tumor classification: a clinical decision support system utilizing multi-parametric 3T MR data
Tsolaki, E.; Svolos, P.; Kousi, E.; Kapsalaki, E.; Fezoulidis, I.; Fountas, K.; Theodorou, K.; Kappas, C.; Tsougos, I. (2015)A clinical decision support system (CDSS) for brain tumor classification can be used to assist in the diagnosis and grading of brain tumors. A Fast Spectroscopic Multiple Analysis (FASMA) system that uses combinations of ... -
A free software for the evaluation and comparison of dose response models in clinical radiotherapy (DORES)
Tsougos, I.; Grout, I.; Theodorou, K.; Kappas, C. (2009)Purpose: The aim of this work was to develop a user-friendly and simple tool for fast and accurate estimation of Normal Tissue Complication Probabilities (NTCP) for several radiobiological models, which can be used as a ... -
Geometrical pre-planning for conformal radiotherapy
Tsougos, I.; Schreibmann, E.; Lahanas, M.; Theodorou, K.; Kappas, C.; Baltas, D. (2007)The optimum selection of beams and arcs in conformal techniques is of the outmost importance in modern radiotherapy. In this work we give a description of an analytic method to aid optimum selection, which is based on ... -
A geometry based optimization algorithm for conformal external beam radiotherapy
Schreibmann, E.; Lahanas, M.; Uricchio, R.; Theodorou, K.; Kappas, C.; Baltas, D. (2003)A geometric solution of the problem of optimal orientation of beams in conformal external radiotherapy is presented. The method uses geometric derived quantities which consider the intersection volume between organs at ... -
Hidradenocarcinoma of the temporal area successfully treated with concomitant electrochemotherapy and radiotherapy
Kyrgias, G.; Kostopoulou, E.; Zafiriou, E.; Skarlatos, J.; Theodorou, K. (2013)Hidradenocarcinoma, the malignant counterpart of hidradenoma, is an extremely rare malignant tumour which may exhibit an aggressive clinical course. The standard primary treatment is wide local excision with or without ... -
Impact of beam quality on megavoltage radiotherapy treatment techniques utilizing gold nanoparticles for dose enhancement
Tsiamas, P.; Liu, B.; Cifter, F.; Ngwa, W. F.; Berbeco, R. I.; Kappas, C.; Theodorou, K.; Marcus, K.; Makrigiorgos, M. G.; Sajo, E.; Zygmanski, P. (2013)This study determines the optimal clinical scenarios for gold nanoparticle dose enhancement as a function of irradiation conditions and potential biological targets using megavoltage x-ray beams. Four hundred and eighty ... -
An inhomogeneity correction algorithm for irregular fields of high-energy photon beams based on Clarkson integration and the 3D beam subtraction method
Stathakis, S.; Kappas, C.; Theodorou, K.; Papanikolaou, N.; Rosenwald, J. C. (2006)A number of treatment-planning systems still use conventional correction methods for body inhomogeneities. Most of these methods (power law method, tissue-air ratio (TAR), etc.) consider only on-axis points, rectangular ... -
An innovative e-health network for collaboration on emergency cases
Ilioudis, C.; Fevgas, A.; Theodorou, K.; Malizos, K.; Dailiana, Z. (2010)This paper discusses a collaborative and innovative e-health system called EMOSNet, for the support of medical decision making in the case of amputated or mangled extremities. The goal of the proposed system is to provide ... -
Internal radionuclide dosimetry using quantitative 3-D nuclear medical imaging
Tsougos, I.; Loudos, G.; Georgoulias, P.; Nikita, K. S.; Theodorou, K. (2009)Quantitative three-dimensional nuclear medical imaging plays a continuously increasing role in radionuclide dosimetry, allowing the development of patient - specific treatment planning systems. The established method for ... -
Investigating brain tumor differentiation with diffusion and perfusion metrics at 3T MRI using pattern recognition techniques
Svolos, P.; Tsolaki, E.; Kapsalaki, E.; Theodorou, K.; Fountas, K.; Fezoulidis, I.; Tsougos, I. (2013)The aim of this study was to evaluate the contribution of diffusion and perfusion MR metrics in the discrimination of intracranial brain lesions at 3T MRI, and to investigate the potential diagnostic and predictive value ... -
The involvement of HER2 and p53 status in the regulation of telomerase in irradiated breast cancer cells
Papanikolaou, V.; Iliopoulos, D.; Dimou, I.; Dubos, S.; Tsougos, I.; Theodorou, K.; Kitsiou-Tzeli, S.; Tsezou, A. (2009)Cancer cell characteristics may play a pivotal role in the response to therapy by activating or deactivating different molecular pathways. In the present study, we investigated the implication of breast cancer cell features, ... -
Is NTCP modelling really useful for the prediction of radiation induced pneumonitis? Dose-response parameters from breast radiotherapy
Tsougos, I.; Mavroidis, P.; Rajala, J.; Jarvenpaa, R.; Theodorou, K.; Hyodynmaa, S.; Pitkanen, M. A.; Holli, K.; Lind, B. K.; Kappas, C. (2004) -
Long-term tele-monitoring of patients with type 2 diabetes mellitus: results of the Greek pilot of the renewing health multicentre randomised control trial
Dafoulas, G. E.; Mavrodi, A.; Gkiata, P.; Giannakakos, H.; Stafylas, P.; Delizona, M.; Aletras, V.; Pechlivangolou, P.; Theodorou, K.; Koukoulis, G.; Bargiota, A. (2014) -
LONG-TERM TELEMONITORING OF PATIENTS WITH DMT2: PRELIMINARY RESULTS OF THE GREEK PILOT OF THE RENEWING HEALTH MULTICENTER RANDOMIZED TRIAL
Dafoulas, G. E.; Giata, V.; Giannakakos, H.; Stafylas, P.; Aletras, V.; Theodorou, K.; Pechlivanoglou, P.; Koukoulis, G.; Bargiota, A. (2014)