Browsing by Author "Erbay, G."
Now showing 1 - 11 of 11
- Results Per Page
- Sort Options
Item Clinical characteristics of relapsed ovarian cancer patients with striking response to the bevacizumab at first relapse(2019) Kose, Fatih; Alemdaroglu, S.; Mertsoylu, H.; Besen, A.; Guler, O.; Simsek, S.; Erbay, G.; Onal, C.; Celik, H.Item The Effect of ADT on ADC Change in Intermediate-Risk Prostate Cancer Patients Receiving Radiotherapy(2023) Onal, C.; Erbay, G.; Oymak, E.; Guler, O. C.; 0000-0002-1706-8680; AAK-5370-2021Item The Impact of the ADC for the Early Prediction of Treatment Response After Definitive Radiotherapy(2023) Onal, C.; Erbay, G.; Guler, O. C.; Oymak, E.; 0000-0002-1706-8680; AAK-5370-2021Item The Outcomes of Definitive Radiotherapy in Patients with Prostate Cancer Using Simultaneous Integrated Boost Technique(2022) Onal, C.; Guler, O. C.; Erbay, G.; Oymak, E.; Yavas, C.; Yavas, G.; 0000-0002-1706-8680; AAK-5370-2021Item The Role of Preoperative Routine Computed Tomography Scanning in The Estimation of High-Risk Factors in Endometrial Cancers(2018) Coban, G.; Erbay, G.; Kose, F.; Alemdaroglu, S.; Onal, C.; Celik, H.; https://orcid.org/0000-0002-3285-5519; https://orcid.org/0000-0002-1706-8680; https://orcid.org/0000-0002-0156-5973; https://orcid.org/0000-0003-4335-6659; https://orcid.org/0000-0002-2742-9021; AAI-9974-2021; AAK-5370-2021; G-4827-2016; AAI-8400-2021; HOC-5611-2023; AAL-1923-2021Objective: To examine the role of preoperative computed tomography (CT) in estimation of the high-risk factors in endometrial cancer cases. Materials and Methods: The data from 161 cases who were diagnosed with endometrioid adenocarcinoma with endometrial biopsy, and staged surgically were retrospectively analyzed. The diagnostic performance of a whole abdominal CT scan in terms of tumor diameter, myometrial invasion, cervical, adnexal, omental involvement, as well as pelvic para-aortic nodal involvement was examined. In addition, extra-uterine and extra-nodal incidental signs were identified. Results: The accuracy rate of preoperative CT scanning was found to be 42%, 78%, 80%, 95%, 97%, 88%, 89%, and 88% for tumor diameter, myometrial invasion, cervical, adnexal, and omental involvement, as well as pelvic para-aortic nodal involvement, respectively. Extra-uterine and extra-nodal incidental signs were identified in 18% of the cases. Incidental findings entailed a modification of management only in one case (0.62%). Conclusion: Preoperative CT scan findings do not present an alternative to intraoperative frozen section analysis or surgical staging. However, based on the findings from the preoperative CT scan, accuracy of predictions about which patients require more complex procedures (lymphadenectomy) can be improved, and therefore preoperative CT scanning may prove useful in more effective use of operating rooms.Item Simultaneous Integrated Boost to Intraprostatic Lesions Using Different Energy Levels Of IMRT and VMAT(2014) Onal, C.; Guler, O. C.; Sonmez, S.; Erbay, G.; Arslan, G.; 0000-0002-1706-8680; HOC-5611-2023; AAK-5370-2021Item Simultaneous integrated boost to intraprostatic lesions using different energy levels of intensity-modulated radiotherapy and volumetric-arc therapy(2014) Onal, C.; Sonmez, S.; Erbay, G.; Guler, O.C.; Arslan, G.Objective: This study compared the dosimetry of volumetric-arc therapy (VMAT) and intensity-modulated radiotherapy (IMRT) with a dynamic multileaf collimator using the Monte Carlo algorithm in the treatment of prostate cancer with and without simultaneous integrated boost (SIB) at different energy levels. Methods: The data of 15 biopsy-proven prostate cancer patients were evaluated. The prescribed dose was 78 Gy to the planning target volume (PTV78) including the prostate and seminal vesicles and 86 Gy (PTV86) in 39 fractions to the intraprostatic lesion, which was delineated by MRI or MR-spectroscopy. Results: PTV dose homogeneity was better for IMRT than VMAT at all energy levels for both PTV78 and PTV86. Lower rectum doses (V-30-V-50) were significantly higher with SIB compared with PTV78 plans in both IMRT and VMAT plans at all energy levels. The bladder doses at high dose level (V-60-V-80) Were significantly higher in IMRT plans with SIB at all energy levels compared with PTV78 plans, but no significant difference was Observed in VMAT plans. VMAT plans resulted in a significant decrease in the mean monitor units (MUs) for 6,10, and 15 MV energy levels both in plans with and those without SIB. Conclusion: Dose escalation to intraprostatic lesions with 86 Gy is safe without causing Serious increase in organs at risk (OARs) doses. VMAT is advantageous in sparing OARs and requiring less MU than IMRT. Advances in knowledge: VMAT with SIB to intraprostatic lesion is a feasible method in treating prostate cancer. Additionally, no dosimetric advantage of higher energy is observed.Item Treatment Outcomes of Simultaneous Integrated Boost to Intraprostatic Lesions with External Beam Radiotherapy in Localized Prostate Cancer Patients(2023) Onal, H. C.; Erbay, G.; Guler, O. C.; Yavas, C.; Oymak, E.; 37785393Item Treatment response evaluation with ADCmean in cervical cancer patient treated with chemoradiotherapy(2016) Onal, C.; Erbay, G.; Guler, O.C.Item Uterine Perforation During Three-Dimensional Image-Guided Brachytherapy in Cervical Cancer Patients(2014) Guler, O. C.; Onal, C.; Guler, Y.; Erbay, G.; 0000-0002-1706-8680; HOC-5611-2023; AAK-5370-2021Item The Utility of Mean Apparent Diffusion Coefficient Value in Patients with Prostate Cancer Treated with Definitive Radiotherapy(2022) Onal, C.; Erbay, G.; Guler, O. C.; Oymak, E.; Yavas, C.; Yavas, G.; 0000-0002-1706-8680; AAK-5370-2021