نتایج جستجو برای: treatment planning system out of field dose

تعداد نتایج: 21524488  

Introduction: The present study aimed to measure the scatter and leakage dose received by out-of-field organs while delivering Radiotherapy (RT) treatment of cervical cancer. Moreover, this study estimated the risk of second cancer (SC). The doses to out-of-field organs were measured using a lithium fluoride (TLD 100) dosimeter while delivering External Beam Radiothera...

Alireza Amouheidari Keyvan Jabbari, Shadi Babazadeh

Introduction Intensity Modulated Radiation Therapy (IMRT) has made a significant progress in radiation therapy centers in recent years. In this method, each radiation beam is divided into many subfields that create a field with a modulated intensity. Considering the complexity of this method, the quality control for IMRT is a topic of interest for researchers. This article is about the various ...

Danial Seifi Makrani Tayyeb Pourfallah

Introduction: Concurrent chemoradiotherapy (CRT) is a standard treatment method for patients with carcinoma of cervix. Despite admirable therapeutic results, acute hematologic toxicity (HT) is common with this regimen. Many studies evaluate the relationship between the bone marrow dosimetric parameters and the severity of HT and result shown that the low dose of bone marrow wou...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - دانشکده علوم انسانی 1390

the purpose of the research is to examine if integrating cooperative learning into vocabulary learning helps to increase word recognition of students in an elementary school in iran. it tries to investigate whether cooperative learning approach enables students to improve their language learning. this research used stad (students team achievement division) as a cooperative model in this study. ...

alireza Amouheidari parvaneh shokrani, Somayeh karimi

Introduction: Sensorineural hearing loss (SNHL) is one of the possible complications of radiotherapy treatment of brain tumors. The auditory system of patients with brain tumors often is placed inside of radiation field and receives a significant amount of radiation dose resulting in hearing loss. The purpose of this study was to compare contouring and delivery dose to cochlea...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - دانشکده زیست شناسی 1388

abstract chickpea is weak in competition of weeds that damages to it at between 40 t0 60 percent. kermanshah province is one of the most important region for chickpea fields in iran. for these reosons, weed management is necessary in this crop. in order to evaluate of herbicides and stubble control on broad leave weeds control in chickpea. experiment was conducted in agricultural research stat...

Journal: :iranian journal of medical physics 0
robab anbiaee assistant professor, radiotherapy and oncology dept., imam hossein hospital, shahid beheshti university, tehran, iran seyed mahmoud reza aghamiri associate professor, nuclear engineering-medical radiation dept., faculty of nuclear engineering, shahid beheshti university, tehran, iran zahra falahatpour m.sc in nuclear engineering-medical radiation, faculty of nuclear engineering, shahid beheshti university, tehran, iran

introduction: radiation therapy following breast conserving surgery is one of the most common procedures performed in any radiation oncology department. a tangential parallel-opposed pair is almost always the technique of choice for this purpose. this technique is often performed based on 3d treatment planning. the aim of this study was to compare 3d treatment planning for two different energie...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علامه طباطبایی 1388

assigning premium to the insurance contract in iran mostly has based on some old rules have been authorized by government, in such a situation predicting premium by analyzing database and it’s characteristics will be definitely such a big mistake. therefore the most beneficial information one can gathered from these data is the amount of loss happens during one contract to predicting insurance ...

Journal: :iranian journal of medical physics 0
seyed mohsen hosseini daghigh radiation medicine department, shahid beheshti university, tehran, iran

introduction interaluminal brachytherapy is one of the important methods of esophageal cancer treatment. the effect of applicator attenuation is not considered in dose calculation method released by aapm-tg43. in this study, the effect of high-dose rate (hdr) brachytherapy esophageal applicator on dose distribution was surveyed in hdr brachytherapy. materials and methods a cylindrical pmma phan...

قرائتی, حسین, جابری, رامین, دهقان‌منشادی, حمیدرضا , سمیعی, فرهاد , شرفی, علی اکبر , میثمی, علی پاشا ,

    Background & Aim: Genitalia system cancers are the third most common cancers. In females, surgery and/or radiotherapy±chemotherapy are treatments of choice for cervical, endometrial or vaginal cancers. Brachytherapy is a complementary part of External Beam Radiotherapy(EBRT). MDR(Medium Dose Rate) brachytherapy in female genitalia cancers is founded on two bases: high and appropriate dose d...

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