نتایج جستجو برای: gamma dose
تعداد نتایج: 423486 فیلتر نتایج به سال:
Intravascular brachytherapy is simulated with Palmaz-Schatz stent, manufactured by Cordis Co. that is radioactived with 188Re source, using the MCNPX code. Functions and dosimetric parameters, were calculated in cylindrical coordinates and results compared with the latest standards and AAPM TG-60 group offers, published experimental data and also other performed simulations with various p...
background: dosimetry is a fundamental part of the radiation processing industry. aqueous inorganic dosimeters have been used for gamma radiation dosimetry such as standard ferrous sulfate dosimeter. the purpose of this study was to investigate the effect of gamma radiation on the diethyl fumarate def in dimethyl sulfoxide dmso solution and its possible use in chemical dosimetry. materials and ...
Mutation breeding as an alternative to conventional breeding, is commonly used to improve current varieties and to generate new varieties. Genetic variation in rice is very low, because of its self-pollination. This study, carried out to determine the GR50 dosage for an irradiation mutagenesis study on the rice and to determine the effects of gamma irradiation on germination and growth rate of ...
Background: Currently available radioprotectors are poorly tolerated in man and the general use of aminothiols is compromised by their side effects. This study was carried out to test and compare the radioprotective potential of cimetidine and famotidine against lethally gamma irradiated NMRI mice. Materials and Methods: Adult male NMRI mice in groups of 10 were exposed to various doses of gamm...
Introduction: One of the problems that exists in the quality control procedure of the treatment planning systems and the computer simulation of the radiotherapy or diagnostic radiology validation is comparing the dose distribution resulted from the dose calculation algorithms with the experimental results(as a reference). For this purpose, several methods have been proposed to compare these dos...
Mutations induced by gamma irradiation are part of improving some important agronomic traits in crops. Identifying the optimal mutagenic dose is considered to be the most crucial step in trials and generating mutated genetic materials. The goal of this study was to evaluate the effect of different doses of gamma ray (0, 150, 200, 250 and 300 Gy) on some plant early stages traits and bioch...
introduction: different environmental factors such as drugs, ionizing radiation, etc can induce apoptosis.in the present study the effects of dose- rate and post-irradiation incubation time on gamma radiation inducedapoptosis in human breast carcinoma cell line (t-47d) (invasive ductal carcinoma) was investigated. material and methods: the t-47d cells were cultured in t25 flasks and during log ...
the adaptive response (ar) is a phenomenon by which cells exposure to sublethal doses of dna-damaging agents (non-mutagenic dose of chemical or radiation), known as conditioning treatment (ct), leads to increased resistance to a subsequent exposure to a higher dose of the same or other agents, known as challenge treatment (cr). the adaptive response (ar) induced by radiation in human lymphocyte...
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...
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