Yazar "Guler, Ozan C." için listeleme
-
Adjuvant Small Pelvic Radiotherapy in Patients with Cervical Cancer Having Intermediate Risk Factors Only - Is It Sufficient?
Onal, Huseyin Cem; Sari, Sezin Yuce; Guler, Ozan C.; Gultekin, Melis; Yildiz, Ferah (2017)Background: We sought to determine the outcomes of adjuvant small pelvic external beam radiotherapy (EBRT) and prognostic factors for survival and disease control. Patients and Methods: We retrospectively evaluated 113 ... -
Chemoradiotherapy-İnduced Hemoglobin Nadir Values And Survival in Patients With Stage III Non-Small Cell Lung Cancer
Topkan, Erkan; Selek, Ugur; Ozdemir, Yurday; Yildirim, Berna A.; Guler, Ozan C.; Mertsoylu, Huseyin; Hahn, Stephen M. (2018)Purpose: We investigated the influence of change in hemoglobin (Hgb) levels during concurrent chemoradiotherapy (C-CRT) on outcomes of non-anemic patients with stage IIIA/B non-small cell lung cancer (NSCLC). Methods: ... -
Correlation of Clinical Risk Factors with Diffusion-Weighted Magnetic Resonance Images in Prostate Cancer Patients Treated with Definitive Radiotherapy
Erbay, Gurcan; Onal, Cem; Guler, Ozan C.; Karadeli, Elif; Koc, Zafer (2015)This study is aimed to correlate apparent diffusion coefficient (ADC) values and clinical T-stage, serum PSA, pathology Gleason scores. We also further analyzed whether ADC values could be used to appropriately define the ... -
Dosimetric Comparison of Sequential Versus Simultaneous-integrated Boost in Early-stage Breast Cancer Patients Treated With Breast-conserving Surgery
Onal, Cem; Efe, Esma; Guler, Ozan C.; Yildirim, Berna A. (2019)Background/Aim: To compare simultaneous-integrated boost (SIB) versus sequential-boost (SB) delivered in the context of whole-breast irradiation (WBI) via volumetric-modulated arc therapy (VMAT) and helical-tomotherapy ... -
Effective Resolution of Lung Cancer Related Tracheal and/or Bronchial Obstruction with External Beam Radiotherapy
Topkan, Erkan; Yildirim, Berna Akkus; Ozdemir, Yurday; Guler, Ozan C.; Kose, Fatih (2015) -
Effects of bladder distension on dose distribution of vaginal vault brachytherapy in patients with endometrial cancer
Guler, Ozan C.; Onal, Cem; Acibuci, Ibrahim (2014)Purpose: To investigate dosimetric effects of bladder distention on organs at risk (OARs) during treatment of endometrial cancer using 3D image-based planning of postoperative vaginal vault brachytherapy (BRT). Material ... -
Factors Associated with Brain Metastasis Development in Radically Treated Stage IIIB Non-Small Cell Lung Cancer Patients
Topkan, Erkan; Yildirim, Berna Akkus; Guler, Ozan C.; Ozdemir, Yurday (2015) -
Incidence and Impact of Pretreatment Tumor Cavitation on Survival Outcomes of Stage III Squamous Cell Lung Cancer Patients Treated With Radical Concurrent Chemoradiation Therapy
Topkan, Erkan; Selek, Ugur; Ozdemir, Yurday; Yildirim, Berna A.; Guler, Ozan C.; Ciner, Fuat; Besen, A. A.; Findikcioglu, Alper; Ozyilkan, Ozgur (2018)Purpose: To investigate the incidence and influence of tumor cavitation (TC) on survival outcomes of locally advanced squamous cell lung cancer (LA-SqCLC) patients treated with concurrent chemoradiation therapy (C-CRT). Methods ... -
Predicting Tumor Recurrence in Patients with Cervical Carcinoma Treated with Definitive Chemoradiotherapy: Value Of Quantitative Histogram Analysis On Diffusion-Weighted MR Images
Erbay, Gurcan; Onal, Cem; Karadeli, Elif; Guler, Ozan C.; Arica, Sami; Koc, Zafer (2017)Background: Further research is required for evaluating the use of ADC histogram analysis in more advanced stages of cervical cancer treated with definitive chemoradiotherapy (CRT). Purpose: To investigate the utility ... -
Prognostic Use of Pretreatment Hematologic Parameters in Patients Receiving Definitive Chemoradiotherapy for Cervical Cancer
Onal, Cem; Guler, Ozan C.; Yildirim, Berna A. (2016)Objectives: The aim of this work was to evaluate the prognostic role of pretreatment neutrophil-to-lymphocyte ratio (NLR) and platelet-to-lymphocyte ratio (PLR) in recipients of definitive chemoradiotherapy (ChRT) for ... -
Prognostic Value of 18F-Fluorodeoxyglucose Uptake in Pelvic Lymph Nodes in Patients with Cervical Cancer Treated with Definitive Chemoradiotherapy
Onal, Cem; Guler, Ozan C.; Reyhan, Mehmet; Yapar, Ali Fuat (2015)Purpose. To evaluate the prognostic significance of the maximum standardized uptake (SUVmax) value for pelvic lymph nodes in patients with cervical cancer and its impact on treatment response, disease control, and ... -
Prognostic Value of Metabolic Response Measured by F-18-FDG-PET in Oesophageal Cancer Patients Treated with Definitive Chemoradiotherapy
Onal, Cem; Torun, Nese; Guler, Ozan C.; Yildirim, Berna A. (2016)BackgroundThis study aimed to assess the efficacy of fluorine-18 fluorodeoxyglucose (F-18-FDG)-PET for predicting overall survival (OS) and disease-free survival (DFS) in oesophageal cancer patients after definitive ... -
Prognostic Value of Metabolic Tumor Volume and Total Lesion Glycolysis in Esophageal Carcinoma Patients Treated with Definitive Chemoradiotherapy
Yildirim, Berna A.; Torun, Nese; Guler, Ozan C.; Onal, Cem (2018)PurposeThe aim of this study was to evaluate the prognostic importance metabolic tumor volume (MTV), total lesion glycolysis (TLG), and standardized uptake value (SUV) in patients with esophageal cancer treated with ... -
Prognostic Value of The Glasgow Prognostic Score For Glioblastoma Multiforme Patients Treated With Radiotherapy and Temozolomide
Topkan, Erkan; Selek, Ugur; Ozdemir, Yurday; Yildirim, Berna A.; Guler, Ozan C.; Ciner, Fuat; Mertsoylu, Huseyin; Tufan, Kadir (2018)To evaluate the prognostic value of the Glasgow Prognostic Score (GPS), the combination of C-reactive protein (CRP) and albumin, in glioblastoma multiforme (GBM) patients treated with radiotherapy (RT) and concurrent plus ... -
Retrospective correlation of (68)ga-psma uptake with clinical parameters in prostate cancer patients undergoing definitive radiotherapy
Onal, Cem; Torun, Nese; Oymak, Ezgi; Guler, Ozan C.; Reyhan, Mehmet; Yapar, Ali F. (2020)Objective The aim of the study is to investigate the correlation between the intensity of prostate-specific membrane antigen (PSMA) uptake in primary tumor and clinico-pathological characteristics of non-metastatic prostate ... -
Risk Factors for Fatal Pulmonary Hemorrhage following Concurrent Chemoradiotherapy in Stage 3B/C Squamous-Cell Lung Carcinoma Patients
Topkan, Erkan; Selek, Ugur; Ozdemir, Yurday; Besen, Ali A.; Guler, Ozan C.; Yildirim, Berna A.; Mertsoylu, Huseyin; Findikcioglu, Alper; Ozyikan, Ozgur; Pehlivan, Berrin (2018)We aimed to identify the fatal pulmonary hemorrhage- (FPH-) related risk factors in stage 3B/C squamous-cell lung carcinoma (SqCLC) patients treated with definitive concurrent chemoradiotherapy (C-CRT). Medical records of ... -
The role of delineation education programs for improving interobserver variability in target volume delineation in gastric cancer
Onal, Cem; Cengiz, Mustafa; Guler, Ozan C.; Dolek, Yemliha; Ozkok, Serdar (2017)Objective: To assess whether delineation courses for radiation oncologists improve interobserver variability in target volume delineation for post-operative gastric cancer radiotherapy planning. Methods: 29 radiation ... -
Stereotactic body radiotherapy for oligoprogressive lesions in metastatic castration-resistant prostate cancer patients during abiraterone/enzalutamide treatment
Onal, Cem; Kose, Fatih; Ozyigit, Gokhan; Aksoy, Sercan; Oymak, Ezgi; Muallaoglu, Sadik; Guler, Ozan C.; Tilki, Burak; Hurmuz, Pervin; Akyol, Fadil (2021)Background Metastasis-directed therapy (MDT) utilizing stereotactic body radiotherapy (SBRT) for oligoprogressive lesions could provide a delay in next-line systemic treatment (NEST) change while undergoing androgen ... -
Survival Analysis of 51 Leptomeningeal Metastatic Non Small Cell Lung Cancer Patients Treated with Whole Brain Radiotherapy
Topkan, Erkan; Yildirim, Berna Akkus; Guler, Ozan C.; Ozdemir, Yurday (2015) -
There Is No Doubt About The Winner Of The Lion-Rabbit Fight
Onal, Cem; Oymak, Ezgi; Guler, Ozan C. (2022)