Hamit Basaran

Selcuk University · Department of Radiation Oncology

Aim: This study investigated the dose calculation accuracy of different treatment planning algorithms used in radiotherapy patients with hip prostheses. Method: The current research produced a tissue-equivalent cylindrical phantom that imitates a leg using a 3D printer. Co-Cr-Mo alloy and Ti-6AI-4V alloy prostheses were placed in the centre of the...

Background/Aims: Different optimization methods in brachytherapy treatment planning have been used. The aim of this study is to evaluate dosimetric differences between manual optimization (MO) and inverse planning simulated annealing (IPSA) planning techniques commonly used in brachytherapy of cervical cancer. Methods: Fifteen cervical cancer patie...

Background/Aims: Different optimization methods in brachytherapy treatment planning is used. The aim of this study is to evaluate dosimetric differences between manual optimization (MO) and inverse planning simulated annealing (IPSA) planning techniques commonly used in brachytherapy of cervical cancer. Methods: Fifteen cervical cancer patients wer...

Objective: Chemotherapy (CT) is the standard treatment for patients with metastatic esophageal cancer. Primary tumor progression is one of the important reasons for morbidity and mortality. Several studies have shown that aggressive treatment of primary tumors in metastatic patients may contribute to survival. In this study, patients with metastati...

Aims: Early-stage endometrioid-type endometrial cancer (EC) has a favorable prognosis. The recurrence is still the biggest issue. There are differences in the literature in terms of treatment modalities in early-stage. We investigated long-term survival outcomes of early-stage grade 1 and 2 endometrioid-type EC patients. Methods: Out of 327 cases,...

Objective: The aim of this study is to report the survival and treatment results of patients with cervical esophageal cancer treated with definitive chemoradiotherapy, whose incidence is very low in the population and there is not enough information about treatment and toxicity results in the literature. Material and Method: Between 2013 and 2022,...

Frontiers in Intensity-Modulated Radiotherapy Research

Öz Amaç: Bu çalışmada meme kanseri nedeniyle radyoterapi alan gerçek hastayı taklit eden bir fantom üzerinde farklı organlarda absorbe edilen doz araştırılmıştır. Farklı organlardaki ortalama doz için tedavi planlama sistemi (TPS) ve termolüminesans dozimetre (TLD) doz ölçümleri karşılaştırılmıştır. Gereç ve Yöntemler: Alderson kadın rando fantom ü...

The aim of this study was to investigate incidental testicular doses during intensity modulated radiation therapy (IMRT) in patients treated with prostate radiotherapy only (PORT) and whole pelvis radiotherapy (WPRT). A total of 34 prostate cancer patients with intermediate and high risk were included in this prospective study. Each patient in the...

Accurate estimation of the surface dose in radiotherapy of patients with head and neck cancer is very important in terms of treatment. The aim of this study is to evaluate the surface dose for intensity-modulated radiotherapy (IMRT) of head and neck cancer using thermoluminescent dosimeters (TLDs). In addition, it is aimed to examine the surface do...

Amaç: Meme kanserinde radyoterapi (RT) uygulaması hastalığın kontrolünde ve sağkalımında önemli bir yere sahiptir. Genel sağkalım sürelerinin artmasına bağlı olarak meme kanseri tedavisinde görülen yan etkilerin önemi artmıştır. Bu çalışmada RT uygulanan meme kanseri olgularda, brakial pleksus, karotis arter ve tiroid dozlarının değerlendirilmesi a...

Aim:The aim of this study was to compare dosimetric advantages of using intensity-modulated radiation therapy (IMRT) and simultaneous-boost (SIB-IMRT) techniques for glioblastoma multiform (GBM).Materials and Methods:Ten patients with GBM were retrospectively selected between the years of 2020 and 2021. For all patients, two treatment plans were cr...

Objective: The purpose of this study was to evaluate the dosimetric differences between inverse optimized (IO) planning methods with the manual optimized (MO) planning approach for brachytherapy of cervical cancer. Methods Fifteen patients were included in this study. High-risk clinical target volume (CTVHR) and intermediate-risk CTV (CTVIR) were...

Unwanted doses may occur in distant organs, outside of the region where we want to be irradiated in patients treated with radiotherapy. These doses may not be accurately calculated by the treatment planning system (TPS). This study aims to measure out-of-field doses using thermoluminescence dosimetry (TLD) in field in field conformal radiotherapy (...

Background: This dosimetric study aims to evaluate the dosimetric advantage of the irregular surface compensator (ISC) compared with the intensity-modulated radiotherapy (IMRT). Materials and methods: Ten patients with whole breast irradiation were planned with the ISC and IMRT techniques. Six different beam directions were selected for IMRT and IS...

z Radyoterapi alan hastalarda tedavi bölgesi dışında uzak organlarda istenmeyen dozlar meydana gelmektedir. Bu dozlar tedavi planlama sistemi (TPS) tarafından doğru olarak hesaplanmayabilir. Bu çalışma endometrium kanseri nedeniyle radyoterapi alan gerçek bir hastayı taklit eden bir fantom üzerinde alan içi alan konformal radyoterapi (FIF) ve yoğun...

Background: This study aimed to compare preoperative chemoradiotherapy (CRT) with postoperative CRT regarding survival, local control, disease control, sphincter preservation, toxicity and also prognostic factors for the treatment of locally advanced rectal cancer. Methods: Records of 140 patients with locally advanced rectal cancer who received...

Background Cancer is one of the leading causes of death worldwide. According to GLOBOCAN estimates, there were 341,831 deaths from cervical cancer in 185 countries in 2020. The aim of this study was to compare equieffective dose (EQD 2 ) at 2 Gy per fraction by using dose volume histograms (DVHs) derived from external beam radiotherapy (EBRT) and h...

Purpose: The aim of this study is to compare the dosimetric results of Helical Tomotherapy (HT) and Multi-field IMRT treatment plans using a Simultaneous Integrated Boost (SIB) technique in the treatment of High-Risk Prostate Cancer (HRPCa) with pelvic nodal radiation. Methods: Seventeen patients planned with HT and 7,8 and 9 fields IMRT were inves...

The dose received by tissues other than the target tissue is defined as the integral dose. Increase in the integral dose causes an increase in the risk of secondary cancer related to radiotherapy in patients who live long term. In long-term survival after breast radiotherapy, secondary malignancies may develop in the thyroid gland, contralateral br...

Background: Esophageal cancer (EC) is known as the most common cancer around the world. The evidence supports that preoperative chemoradiotherapy (CRT) improves resectability and survival in locally advanced EC patients. Objectives: The current study aimed to evaluate the results of treatment in patients suffering from EC in an endemic region. Meth...

Radiation therapy plays an important role in the treatment of locally advanced lung cancer. The aiım of this study was to investigated dosimetric advantages for lung doses using three dimensional conformal radiotherapy (3 DCRT) and intensity-modulated radiation therapy (IMRT) plans. 10 patients with sequential locally advanced lung cancer LALCa (St...

This study aimed to measure the dose exposed by the fetus during three-dimensional conformal radiotherapy (3D-CRT) and intensity-modulated radiotherapy (IMRT) treatment techniques in pregnant patients who had to undergo radiotherapy due to breast cancer with thermoluminescence dosimetry (TLD) and compare these measurements with treatment planning s...

Background: Laryngeal cancer is a common type of head and neck cancer (HNC). Radiotherapy (RT) is a mainstay for curative treatment. Intensity-modulated RT (IMRT) is a standard technique today, as it provides of higher survival and local control and lower normal tissue toxicity. One of IMRT devices is helical tomotherapy (HT). The HT treatment res...

The aim of this study was to evaluate the dosimetric differences between manual optimized (MO) with the inverse optimized (IO) planning methods for brachytherapy of endometrium cancer. Ten patients who underwent HDR brachytherapy for endometrium cancer were selected in this study. Two plans were calculated for each patient: Manual optimized and inv...

The aim of this study is to investigate the dosimetric difference between inverse optimized (IO) and geometric optimized (GO) three-dimensional brachytherapy treatment planning methods used in brachytherapy of cervical cancer. Fifteen patients were included in this study. High-risk clinical target volume (CTVHR) and intermediate-risk clinical targe...

Absract: The prpose of this study was to evulated dosimetric differences utilizing modulated radiation therapy (IMRT) techniques for prostate cancer. 10 patients with prostate cancer were selected and compared. 3 DCRT and IMRT plans were created using the solution commercialised by Varian with the Eclipse treatment planning system (TPS). 3 DCRT and...

Objective: This study aimed to assess the efficiency of radiotherapy and evaluate its outcomes for elderly (>65 years) patients who have undergone treatment for nasopharyngeal carcinoma (NPC).Methods: Forty-five (male, 35; female, 10) elderly patients with a diagnosis of undifferentiated NPC who were treated at our insti�tution between 1994 and 201...

This study aims to evaluate inter-fractional setup errors in patients treated with distinct immobi-lization equipment (thermoplastic mask, knee-fix and feet-fix, wing board and vac-lok) for four anatomical regions including brain, head and neck (HN), thorax and pelvis. Data of randomly selected 140 patients who were treated for four anatomical regi...

Chondrosarcomas are malignant bone tumors which develop as a cartilaginous differentiation of primary mesenchymal cells and the second most frequently seen malignant tumor of the bone after osteosarcoma. These malignancies are slowly growing non-epithelial tumors with unknown etiology and most frequently seen during the 4 decades of life. They are...

Gastric cancers

Oesophageal squamous cell carcinoma (ESCC) is endemic in the Eastern Anatolian region of Turkey. The present study was performed to identify risk factors for ESCC that specifically reflect the demography and nutritional habits of individuals living in this region. The following parameters were compared in 208 ESCC patients and 200 control individua...

To present information about prognostic factors of gastric cancer patients treated in our Erzurum center including age, gender, tumour location, pathological grade, stage and the effect of treatment on survival. This retrospective study was performed on patients who applied to our clinic and diagnosed as gastric cancer. Age and gender of the patien...

Relatively few studies have focused on T4N2 (stage IIIB) locally advanced non-small cell lung cancer (NSCLC). In this study, we tried to identify prognostic factors for patients with clinical stage T4N2 NSCLC. We retrospectively identified 223 patients, of which 168 met the inclusion criteria. Patients treated with curative intent using concurrent...

Background: Currently poster presentations offer a common visual medium for knowledge transfer by a wide range of health professionals. Our study aimed to determine the scientific importance of poster presentations for Medical and Radiation Oncologists. Methods: A survey form including 40 questions was distributed to a total of 131 oncologists e...

Background: Despite advances in radiotherapy, overall survival of glioblastoma multiforme (GBM) patients is still poor. Moreover dosimetrical analyses with these newer treatment methods are insufficient. The current study is aimed to compare intensity modulated radiation therapy (IMRT) linear accelerator (linac) and helical tomotherapy (HT) treatm...

Esophageal cancer risk factors

The knowledge of tha oncologists about poster presentations

Introduction Ameloblastoma is a benign but locally aggressive tumor of odontogenic epithelial tissue. Reports of radiotherapy treatment modalities are limited in the literature. Case presentation A thirty-five year old male presented with complaints of headache radiating to his face for about six months and impaired vision. The patient’s Positron...

Painful plantar heel spur (PPHS) is a benign disorder with painful heels as a result of plantar calcaneal bone spur. Exact etiological factors are still unclear. Treatment typically consists of osteoarthritis tretment schedules and surgical techniques. External radiotherapy is another treatment option. This study is aimed to determine effectiveness...

Tomoterapi, MVCT görüntüleme