نتایج جستجو برای: Monte Carlo Polymer gel Radiotherapy

تعداد نتایج: 326301  

Journal: :iranian journal of radiation research 0
w. parwaie department of radiology, faculty of para-medicine, hormozgan university of medical sciences, bandar abbas, iran m. yarahmadi department of medical physics, faculty of medicine, kurdistan university of medical sciences, sanandaj, iran h.a. nedaie department of radiotherapy, cancer institute, tehran university of medical sciences, tehran, iran m.h. zahmatkesh shahid beheshti university of medical sciences, tehran, iran a.h. barati department of medical physics, faculty of medicine, kurdistan university of medical sciences, sanandaj, iran m. afkhami department of radiology, faculty of para-medicine, hormozgan university of medical sciences, bandar abbas, iran

background: accurate small radiation field dosimetry is essential in modern radiotherapy techniques such as stereotactic radiosurgery (srs) and intensity modulated radiotherapy (imrt). precise measurement of dosimetric parameters such as beam profile, percentage depth doses and output factor of these beams are complicated due to the electron disequilibrium and the steep dose gradients. in the p...

Journal: Nanomedicine Journal 2019

Objective(s): Normoxic MAGIC-f polymer gels are established dosimeters used for three dimensional dose quantifications in radiotherapy. Nanoparticles with high atomic number such as gold are novel radiosensitizers used to enhance doses delivered to tumors. The aim of this study was to investigate the effect of gold nanoparticles (GNPs) in enhancing percentage depth doses (PDDs) within the MAGIC...

Journal: :journal of biomedical physics and engineering 0
h khosravi tarbiat modares university b hashemi tarbiat modares university s r mahdavi irani university of medical sciences p hejazi semnan university of medical sciences

background: gel polymers are considered as new dosimeters for determining radiotherapy dose distribution in three dimensions. objective: the ability of a new formulation of magic-f polymer gel was assessed by experimental measurement and monte carlo (mc) method for studying the effect of gold nanoparticles (gnps) in prostate dose distributions under the internal ir-192 and external 18mv radioth...

Journal: :iranian journal of medical physics 0
tayeb allahverdi pourfallah biochemistry and biophysics dept., faculty of medicine, mazandaran university of medical sciences, sari, iran

introduction polymer gel dosimeters offer a practical solution to 3d dose verification for conventional radiotherapy as well as intensity-modulated and stereotactic radiotherapy. in this study, egsnrc calculated and pagat polymer gel dosimeter measured dose profiles from single shot irradiation with 18 mm collimator of gamma knife in homogeneous and inhomogeneous phantoms were compared with eac...

Background: Gel polymers are considered as new dosimeters for determining radiotherapy dose distribution in three dimensions.Objective: The ability of a new formulation of MAGIC-f polymer gel was assessed by experimental measurement and Monte Carlo (MC) method for studying the effect of gold nanoparticles (GNPs) in prostate dose distributions under the internal Ir-192 and external 18MV radiothe...

Bijan Hashemi, Hossein khosravi Seyed Rabi Mahdavi

Introduction: Normoxic MAGIC-f polymer gels are established dosimeters used for three dimensional dos uantifications in radiotherapy. The high atomic number nanoparticles such as gold are nov adiosensitizers used to enhance doses delivered to tumors. The aim of this study was t vestigate the effect of gold nanoparticles (GNPs) in enhancing percentage depth doses (PDD ithin the...

ژورنال: سنجش و ایمنی پرتو 2019

Radiotherapy includes all methods that can deliver a particular amount of ionizing radiation to malignant tissues, assuming that minimal damage hurts healthy tissues. We are looking for a valuable and reliable method to measure absorbed dose and the ability to measure the distribution of absorbed dose in three dimensions which nowadays is one of the three-dimensional dosimetry methods in using ...

A.H. Barati, H.A. Nedaie, M. Afkhami, M. Yarahmadi, M.H. Zahmatkesh, W. Parwaie,

Background: Accurate small radiation field dosimetry is essential in modern radiotherapy techniques such as stereotactic radiosurgery (SRS) and intensity modulated radiotherapy (IMRT). Precise measurement of dosimetric parameters such as beam profile, percentage depth doses and output factor of these beams are complicated due to the electron disequilibrium and the steep dose gradients. In the p...

Journal: :journal of medical signals and sensors 0
maryam atarod parvaneh shokrani

background: because of the adverse effects of ionizing radiation on fetuses, prior to radiotherapy of pregnant patients, fetal dose should be estimated. fetal dose has been studied by several authors in different depths in phantoms with various abdomen thicknesses (at). in this study, the effect of maternal at and depth in fetal dosimetry was investigated, using peripheral dose (pd) distributio...

2015
H. Khosravi B. Hashemi S. R. Mahdavi P. Hejazi

BACKGROUND Gel polymers are considered as new dosimeters for determining radiotherapy dose distribution in three dimensions. OBJECTIVE The ability of a new formulation of MAGIC-f polymer gel was assessed by experimental measurement and Monte Carlo (MC) method for studying the effect of gold nanoparticles (GNPs) in prostate dose distributions under the internal Ir-192 and external 18MV radioth...

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