Auflistung nach Autor "Kappas, C."
Anzeige der Dokumente 21-34 von 34
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Monte Carlo dosimetric evaluation of high energy vs low energy photon beams in low density tissues
Tsiakalos, M. F.; Stathakis, S.; Plataniotis, G. A.; Kappas, C.; Theodorou, K. (2006)Background and purpose: Low megavoltage photon beams are often the treatment choice in radiotherapy when low density heterogeneities are involved, because higher energies show some undesirable dosimetric effects. This work ... -
NTCP modelling and pulmonary function tests evaluation for the prediction of radiation induced pneumonitis in non-small-cell lung cancer radiotherapy
Tsougos, I.; Nilsson, P.; Theodorou, K.; Kjellen, E.; Ewers, S. B.; Jarlman, O.; Lind, B. K.; Kappas, C.; Mavroidis, P. (2007)This work aims to evaluate the predictive strength of the relative seriality, parallel and Lyman-Kutcher-Burman (LKB) normal tissue complication probability (NTCP) models regarding the incidence of radiation pneumonitis ... -
Occupational Electromagnetic Fields exposure in Magnetic Resonance Imaging systems - Preliminary results for the RF harmonic content
Gourzoulidis, G.; Karabetsos, E.; Skamnakis, N.; Xrtistodoulou, A.; Kappas, C.; Theodorou, K.; Tsougos, I.; Maris, T. G. (2015)Purpose: European legislation concerning the protection of workers from exposure to Electromagnetic Fields (EMF) was recently (26.6.2013) completed by Directive 2013/35/ΕU. This Directive is a specific one of the framework ... -
Patient-specific internal radionuclide dosimetry
Tsougos, I.; Loudos, G.; Georgoulias, P.; Theodorou, K.; Kappas, C. (2010)The development of patient-specific treatment planning systems is of outmost importance in the development of radionuclide dosimetry, taking into account that quantitative three-dimensional nuclear medical imaging can be ... -
Prediction of AVM obliteration after stereotactic radiotherapy using radiobiological modelling
Mavroidis, P.; Theodorou, K.; Lefkopoulos, D.; Nataf, F.; Schlienger, M.; Karlsson, B.; Lax, I.; Kappas, C.; Lind, B. K.; Brahme, A. (2002)This study was carried out in order to derive the radiobiological parameters of the dose-response relation for the obliteration of arteriovenous malformation (AVM) following single fraction stereotactic radiotherapy. ... -
Proton magnetic resonance spectroscopy at 3T - Evaluation of metabolic profile of human brain lesions
Kousi, E.; Tsougos, I.; Kapsalaki, E.; Kappas, C.; Theodorou, K. (2009)Brain MR imaging at 3T has been increasingly used in clinical practice since a great deal of effort has been invested in research into high magnetic fields to overcome the difficulties of successively working with stronger ... -
Radiation dose optimisation and risk estimation to patients and staff during hysterosalpingography
Sulieman, A.; Theodorou, K.; Vlychou, M.; Topaltzikis, T.; Roundas, C.; Fezoulidis, I.; Kappas, C. (2008)Hysterosalpingography (HSG) is an efficient radiological examination for the evaluation of the female reproductive tract. However, it involves unavoidable irradiation to the ovaries of women in childbearing age. Therefore, ... -
A radionuclide dosimetry toolkit based on material-specific Monte Carlo dose kernels
Loudos, G.; Tsougos, I.; Boukis, S.; Karakatsanis, N.; Georgoulias, P.; Theodorou, K.; Nikita, K.; Kappas, C. (2009)Objective We sought to develop a user-friendly dosimetry toolkit that should aid the improvement of the quality of radionuclide therapy, which is critically dependent on patient-specific planning of each treatment. Methods ... -
Residual telomerase activity as a marker of cell survival after exposure to ionizing radiation in vitro
Tsezou, A.; Satra, M.; Tsougos, Y.; Theodorou, K.; Papanikolaou, V.; Mavroidis, P.; Vamvakopoulos, N.; Kappas, C. (2004) -
A review of PET normalization: striving for count rate uniformity
Theodorakis, L.; Loudos, G.; Prassopoulos, V.; Kappas, C.; Tsougos, I.; Georgoulias, P. (2013)The advent of PET instrumentation signaled the beginning of a new perspective in nuclear medicine diagnostic imaging. PET systems rely on several corrections that must be applied in order to establish accurate and reliable ... -
The role of diffusion and perfusion weighted imaging in the differential diagnosis of cerebral tumors: a review and future perspectives
Svolos, P.; Kousi, E.; Kapsalaki, E.; Theodorou, K.; Fezoulidis, I.; Kappas, C.; Tsougos, I. (2014)The role of conventional Magnetic Resonance Imaging (MRI) in the detection of cerebral tumors has been well established. However its excellent soft tissue visualization and variety of imaging sequences are in many cases ... -
Spectroscopic Evaluation of Glioma Grading at 3T: The Combined Role of Short and Long TE
Kousi, E.; Tsougos, I.; Tsolaki, E.; Fountas, K. N.; Theodorou, K.; Fezoulidis, I.; Kapsalaki, E.; Kappas, C. (2012)Purpose. To evaluate the diagnostic value of 3T H-1-MRS in grading cerebral gliomas using short and long echo times. Methods. (HMRS)-H-1 was performed on 71 patients with untreated cerebral gliomas. Metabolite ratios of ... -
Survivin regulation by HER2 through NF-kappa B and c-myc in irradiated breast cancer cells
Papanikolaou, V.; Iliopoulos, D.; Dimou, I.; Dubos, S.; Kappas, C.; Kitsiou-Tzeli, S.; Tsezou, A. (2011)Radiotherapy is an important treatment modality against cancer resulting in apoptosis and inhibition of cell growth. Survivin is an important cancer biomarker conferring to tumour cells increased survival potential by ... -
The use of radiobiological parameters and the evaluation of NTCP models. How do they affect the ability to estimate radiation induced complications?
Svolou, P.; Tsougos, I.; Theodorou, K.; Kappas, C. (2009)Normal Tissue Complication Probability (NTCP) models currently used, provide a simplified representation of the clinical radiobiology since there are number of radiobiological mechanisms which affect the clinical outcome ...