نتایج جستجو برای: High Dose Rate Brachytherapy

تعداد نتایج: 2968291  

Journal: :iranian journal of radiation research 0
a. mesbahi medical physics department, medical school and radiation oncology department, imam-khomeini hospital, tabriz university of medical sciences, tabriz, iran

background: the monte carlo (mc) method is not only used for dose calculations around brachytherapy sources but also for benchmarking treatment planning systems (tps) calculations. materials and methods: three 60co sources of gzp6 brachytherapy unit were simulated using mcnp4c mc code. the radial dose functions were calculated by mc method and gzp6 tps and were compared. results: there was a go...

2006
DA Wilkinson

The widespread adoption of high dose rate brachytherapy with its inherent dangers necessitates adoption of appropriate quality assurance measures to minimize risks to both patients and medical staff. This paper is aimed at assisting someone who is establishing a new program or revising one already in place into adhere to the recently issued Nuclear Regulatory Commission (USA) regulations and th...

2005
Peter P. Jansen Wilhelmina M. Eijkenboom Dick Sipkema

Purpose: A growing body of data suggests that local control in nasopharyngeal cancer (NPC) is related to the radiation dose administered. We conducted a singleinstitution study of high-dose radiotherapy (RT), which incorporated high-dose-rate (HDR) brachytherapy (BT). These results were analyzed together with data obtained from controls who did not receive BT. Patients and Methods: The BT group...

Journal: :British Journal of Cancer 1995

Journal: :iranian journal of radiation research 0
m.b. tavakoli department of medical physics and medical engineering, school of medicine, isfahan university of medical sciences, isfahan, iran d. shahbazi-gahrouei department of medical physics and medical engineering, school of medicine, isfahan university of medical sciences, isfahan, iran m. hosseinpour department of medical physics and medical engineering, school of medicine, isfahan university of medical sciences, isfahan, iran

background: for an effective treatment planning in brachytherapy, it is necessary to know the accurate source dosimetric information such as air kerma strength, exposure rate constant, dose rate constant and redial dose distribution. the usual method to determine these factors is thermo luminescent dosimeter (tld) dosimetry. nowadays, another more accurate method is known to be the monte carlo ...

Journal: :iranian journal of medical physics 0
hossein salehi yazdi m.sc. student of medical radiation engineering , nuclear engineering and physics dept., amirkabir university of technology, tehran, iran mojtaba shamsaei assistant professor, nuclear engineering and physics dept., amirkabir university of technology, tehran, iran hamid reza shabani m.sc. student of medical physics, medical physics dept., tehran university of medical sciences, tehran, iran ramin jaberi radiotherapy physicist, cancer institute, imam khomeini hospital, tehran, iran saeed setayeshi associate professor, nuclear engineering and physics dept., amirkabir university of technology, tehran, iran

introduction: this study investigates to what extent the computed dose received by lung tissue in a commercially available treatment planning system (tps) for 192ir high-dose-rate breast brachytherapy is accurate in view of tissue inhomogeneities and presence of ribs. materials and methods: a ct scan of the breast was used to construct a patient-equivalent phantom in the clinical treatment plan...

Abdolazim Sedighi Fahimeh Rezaei, Mohammad Hadi Gholami Mohammad Mohammadi, Ramin Jaberi

Introduction: A study was performed to evaluate radiation dose distribution and dose gradient around cylindrical applicators for high-dose-rate (HDR) brachytherapy systems with 192Ir, 60Co brachytherapy source applied for rectal and vaginal cancers treatments.   Materials and Methods: Two additional computed tomography (CT) based plans were generated using a ...

Journal: :Journal of Radiation Research 2012

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