introduction the potential hazards posed by exposure to radiation from radon have been of great concern worldwide, since it is especially associated with increased risk of lung cancer. some radioisotopes of radon progeny deposited in the human lungs emit β particles followed by the γ rays. while γ rays are comparatively less damaging to the respiratory system than α and β particles, it is the p...

Background: Radioiodine therapy has proven to be an effective method in the treatment of patients with differentiated thyroid carcinoma after thyroidectomy. The scope of this study is to describe a method to obtain the dose of organs using medical internal radiation dosimetry (MIRD) method. At the end, the results of MIRD calculations were compared with thermoluminescent dosimeter (TLD...

Dose reconstruction is a comprehensive analysis of the exposure received by individuals in the vicinity of facilities that release contaminants to the environment (i.e., real doses to real people).Performing dose reconstruction analyses which are extremely important elements for improving efficiency in radiological emergencies and accidents have been studied in this paper. For dose reconstructi...

Introduction The potential hazards posed by exposure to radiation from radon have been of great concern worldwide, since it is especially associated with increased risk of lung cancer. Some radioisotopes of radon progeny deposited in the human lungs emit β particles followed by the γ rays. While γ rays are comparatively less damaging to the respiratory system than α and β particles, it is the p...

background and aims: our previous study has demonstrated that essence of carum copticum reduces contraction activity of ileum in rat. the present study was designed to find out the effects of nonpolar fraction of carum copticum essence (nfcce) on mechanical activity of the isolated ileum in rat. materials and methods: for evaluation of spasmolythic property of fraction, different doses of the s...

Several studies have reported a correlation between pesticides exposure and metabolic disorders. Dichlorodiphenyltrichloroethane (DDT) permethrin (PMT), two highly prevalent in the environment, been associated to dysregulation of liver lipids glucose metabolisms non-alcoholic fatty disease (NAFLD). However, effects DDT/PMT mixtures mechanisms mediating their action remain unclear. Here, we used...

introduction: the purpose of this study was to compare estimation of radiation absorbed doses to patients following bone scans with technetium-99m-labeled methylene diphosphonate (mdp) with the estimates given in mirdose software. methods: in this study, each patient was injected 25 mci of 99m tc-mdp. whole-body images from thirty patients were acquired by gamma camera at 10, 60, 90, 180 minute...