نتایج جستجو برای: dose response curve.

تعداد نتایج: 1334941  

Journal: :iranian journal of science and technology (sciences) 2008
m. sharifzadeh

a lithium borate thermoluminescence dosimeter with 0.3 wt% of manganese impurityconcentration was prepared for high dose levels in the range of 1-30 kgy for gamma irradiation applications.the tld reader was used for read out purposes from ambient temperature to about 400°c with a heating rate of 6°c/sec. the pre- and post- irradiation anneal temperature was 300°c for 1.5 and 1 hours respectivel...

Journal: :iranian journal of radiation research 0
a. mahmoudzadeh emamchai novin medical radiation institute, tehran, iran h. mozdarani department of medical genetics, school of medical science, tarbiat modarres university, tehran, iran s. mohammadifrad novin medical radiation institute, tehran, iran

premature chromosome condensation (pcc) appears to have a possible utility for biological dosimetry purposes. the pcc technique may be adapted for cases of suspicion of overexposure where sampling is performed at least one day after an accident. for this purpose, human blood samples were exposed in vitro to 60co up to 10 gy and the pcc technique was performed immediately after irradiation. anal...

Journal: :journal of biomedical physics and engineering 0
f golfam tarbiat modares university b hashemi tarbiat modares university a haeri nuclear science and technology research institute a nikoofar iran university of medical sciences

background: cytogenetic tests are usually used for diagnosing predisposed individuals to cancer by determining their lymphocyte radiosensitivity. objective: to determine the potential role of radiosensitivity in predisposition of prostate cancer by comparing lymphocyte radiosensitivity of prostate cancer patients with healthy donors. materials and methods: the blood samples of 10 prostate cance...

Journal: :Environmental Science & Technology 2004

A. Mahmoudzadeh, H. Mozdarani, M. Foroghizadeh, S.A. Haeri,

Background: Lymphocyte-dicentric assay is the most generally accepted method for biological dosimetry of overexposed individuals. In this study, the frequency of unstable chromosome aberration in blood lymphocytes was used to estimate radiation dose received by individuals. Evaluation of dose using a calibration curve produced elsewhere may have a significant uncertainty therefore, experiments ...

ژورنال: سنجش و ایمنی پرتو 2020

Estimation of absorbed dose for radiation workers or person involved in different radiological accident is the aim of biodosimetry. Cytogenetic methods are the most current and applicable biodosimetry tools. In chronic or protracted exposure, fluorescence in situ hybridization (FISH), stable chromosomal aberration is used for estimation of absorbed dose. For precise estimation of absorbed dose,...

Journal: :iranian journal of radiation research 0
s.a. haeri department of radiobiology, novin medical radiation institute, tehran, iran h. mozdarani m. foroghizadeh a. mahmoudzadeh

background: lymphocyte-dicentric assay is the most generally accepted method for biological dosimetry of overexposed individuals. in this study, the frequency of unstable chromosome aberration in blood lymphocytes was used to estimate radiation dose received by individuals. evaluation of dose using a calibration curve produced elsewhere may have a significant uncertainty therefore, experiments ...

ژورنال: سنجش و ایمنی پرتو 2020

Dose assessment of radiation victims is a key element in medical management of radiation accidents. At high radiation doses (> 6 Gy), dicentric assay lose its efficiency and premature chromosome condensation (PCC) assay was proposed to overcome the restrictions of dicentric assay. It was shown that PCC ring is more suitable and simpler than dicentric for biodosimetry in high radiation doses. In...

ژورنال: سنجش و ایمنی پرتو 2017

Rapid development in nuclear industry and medical applications involving radiation sources would increase the potential of exposure to the ionizing radiation. Due to the harmful effects of radiation exposure on the health of radiation workers, rapid dose estimation of the overexposed victims with high accuracy is quite important in taking appropriate medical treatment plan. Biological dosimetry...

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