Πλοήγηση ανά Συγγραφέα "Theodorou, K."
Αποτελέσματα 1-20 από 69
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Accelerated Hypofractionated Whole-Breast Irradiation With Concomitant Daily Boost in Early Breast Cancer
(2015)Objectives:The aim of this study is to evaluate the feasibility and the related toxicity of hypofractionated whole-breast irradiation with a concomitant daily boost in early breast cancer women not eligible for accelerated ... -
Application value of 3T H-1-magnetic resonance spectroscopy in diagnosing breast tumors
(2013)Background: Assessment of breast lesions with magnetic resonance imaging (MRI) provides a means for lesion detection and diagnosis. Proton (hydrogen-1) magnetic resonance spectroscopy (H-1-MRS) has been proposed as a useful ... -
Automated differentiation of glioblastomas from intracranial metastases using 3T MR spectroscopic and perfusion data
(2013)Purpose Differentiation of glioblastomas from metastases is clinical important, but may be difficult even for expert observers. To investigate the contribution of machine learning algorithms in the differentiation of ... -
Beam quality and dose perturbation of 6 MV flattening-filter-free linac
(2014)The aim of this study is twofold: (a) determination of the spectral differences for flattening-filter-free (FFF) versus standard (STD) linac under various clinical conditions, (b) based on an extensive list of clinically ... -
Brain lesion classification using 3T MRS spectra and paired SVM kernels
(2011)The increased power and resolution capabilities of 3T Magnetic Resonance (MR) scanners have extended the reach of Magnetic Resonance Spectroscopy as a non-invasive diagnostic tool. Practical sensor calibration issues, ... -
Challenges and Choices in Prostate Cancer Irradiation: From the Three Dimensional Conformal Radiotherapy to the Era of Intensity Modulated, Image-Guided and Adaptive Radiation Treatment
(2014)In the last decades the status of radiotherapy was tremendously increased in terms of conformity to the target as well as image-guided techniques in conjunction with intensity-modulated radiotherapy (IMRT). The technological ... -
Classification methods for the differentiation of atypical meningiomas using diffusion and perfusion techniques at 3-T MRI
(2013)The purpose was to investigate the contribution of machine learning algorithms using diffusion and perfusion techniques in the differentiation of atypical meningiomas from glioblastomas and metastases. Apparent diffusion ... -
Classification of pathological human brain lesions using magnetic resonance spectroscopy at 3T
(2009)Magnetic Resonance Spectroscopy is a powerful non-invasive diagnostic tool that is used in conjunction with MRI techniques to provide identification and quantification of biologically important compounds in soft tissue. ... -
Clinical validation of the LKB model and parameter sets for predicting radiation-induced pneumonitis from breast cancer radiotherapy
(2006)The choice of the appropriate model and parameter set in determining the relation between the incidence of radiation pneumonitis and dose distribution in the lung is of great importance, especially in the case of breast ... -
Combining geometry and image in biomedical systems: The RT TPS case
(2009)Patient anatomy, biochemical response, as well functional evaluation at organ level, are key fields that produce a significant amount of multi modal information during medical diagnosis. Visualization, processing, and ... -
A comparison of Monte Carlo simulation with experimental dosimetric techniques for a 6 MV stereotactic radiotherapy unit
(2004)Purpose: To compare Monte Carlo simulation with conventional dosimetry techniques for stereotactic radiotherapy (SRT), since accurate dosimetry of narrow photon beams is very complicated and has often been questioned, ... -
Comparison of Two Radiotherapeutic Hypofractionated Schedules in the Application of Tumor Bed Boost
(2013)The application of the tumor bed boost by using 2 different hypofractionated planning techniques permit more efficient use of resources in hospitals. The evaluation of the radiation toxicity and the efficacy of the 2 ... -
The contribution of diffusion tensor imaging and magnetic resonance spectroscopy for the differentiation of breast lesions at 3T
(2014)Background: Conventional breast magnetic resonance imaging (MRI), including dynamic contrast-enhanced MR mammography (DCE-MRM), may lead to ambiguous diagnosis and unnecessary biopsies. Purpose: To investigate the contribution ... -
Correlation between radiation-induced telomerase activity and human telomerase reverse transcriptase mRNA expression in HeLa cells
(2006)Purpose: To quantify and correlate human telomerase reverse transcriptase (hTERT) mRNA expression with telomerase activity (TA) after ionizing irradiation of HeLa cells. Materials and methods: TA and hTERT mRNA expression ... -
Cytologic patterns of lymphadenopathy in canine monocytic ehrlichiosis
(2011)Background Recognition of different cytologic patterns in lymph nodes (LNs) from dogs with canine monocytic ehrlichiosis (CME) and noninfectious causes of lymphoid reactivity may have diagnostic utility. Objectives The ... -
Cytolytic T-cell response against Epstein-Barr virus in lung cancer patients and healthy subjects
(2010)Background: This study aimed to examine whether EBV seropositive patients with lung cancer have an altered virus-specific CTL response, as compared to age-matched healthy controls and whether any variation in this response ... -
Development of a Simplified Model for Nitrogen Fertilizer Recommendation for Maize, Wheat, and Sunflower in Northern Greece
(2013)In many cases, fertilizer crop recommendations in northern Greece are made based on personal opinions rather than scientific background. This may lead to overfertilization and waste of resources. For sound fertilizer ... -
Development of an mHealth open source platform for diabetic foot ulcers tele-consultations
(2012)Diabetes is one of the foremost causes of death in many countries and a leading cause of blindness, renal failure, and non-traumatic amputation. Therefore, diabetic foot ulceration and amputation cause extensive burden on ...