نتایج جستجو برای: Radiation attenuation, Dispersion rheology, Mtallic compounds, Radiology, X-ray

تعداد نتایج: 1214509  

Shielding radiation from both x-rays and gamma-rays is important for personnel in medical fields e.g. interventional radiology, nuclear power stations, and other inspection facilities where radiation is involved. Lead is known for its effective shielding property against these high energy radiations, however heaviness and toxicity are its main drawback. In this study effectiveness of non-lead p...

Journal: :iranian journal of radiation research 0
a. aghaz nuclear engineering department, shiraz university, shiraz, iran r. faghihi nuclear engineering department, shiraz university, shiraz, iran s.m.j. mortazavi medical physics department and the center for research on radiological sciences, shiraz university of medical sciences, shiraz, iran a. haghparast medical physics department, kermanshah university of medical sciences, kermanshah, iran s. mehdizadeh radiation research center, shiraz university, shiraz, iran s. sina radiation research center, shiraz university, shiraz, iran

background: it has recently been shown that the particle size of materials used for radiation shielding can affect the magnitude of radiation attenuation. over the past years, application of nano-structured materials in radiation shielding has attracted attention world-wide. the purpose of this study was to investigate the shielding properties of the lead-free shields containing micro and nano-...

Journal: :journal of biomedical physics and engineering 0
m kazempoor 1. msc, department of radiobiology, school of paramedical sciences, shiraz university of medical sciences, shiraz, iran; 2. student research committee, school of paramedical sciences, shiraz university of medical sciences, shiraz, iran; m saeedimoghadam ionizing and non-ionizing radiation protection research center, school of paramedical sciences, shiraz university of medical sciences, shiraz, iran f shekoohi shooli n shokrpoor english department, faculty of paramedical sciences, shiraz university of medical sciences, shiraz, iran

background: in diagnostic radiology lead apron, are usually used to protect patients and radiology staff against ionizing radiation. lead apron is a desirable shield due to high absorption and effective attenuation of x-ray photons in the diagnostic radiology range. objective: although lead aprons have good radiation protection properties, in recent years, researchers have been looking for alte...

Background:In diagnostic radiology lead apron, are usually used to protect patients and radiology staff against ionizing radiation. Lead apron is a desirable shield due to high absorption and effective attenuation of x-ray photons in the diagnostic radiology range.Objective: Although lead aprons have good radiation protection properties, in recent years, researchers have been looking for altern...

Journal: :iranian journal of medical physics 0
mehdi zehtabian ray medical engineering department, school of mechanical engineering, shiraz university, shiraz iran elham piruzan ray medical engineering department, school of mechanical engineering, shiraz university, shiraz iran zahra molaiemanesh ray medical engineering department, school of mechanical engineering, shiraz university, shiraz iran

introduction lead-based shields are the most widely used attenuators in x-ray and gamma ray fields. the heavy weight, toxicity and corrosion of lead have led researchers towards the development of non-lead shields. materials and methods the purpose of this study was to design multi-layered shields for protection against x-rays and gamma rays in diagnostic radiology and nuclear medicine. in this...

Elham Piruzan Mehdi Zehtabian, Sedigheh Sina Zahra Molaiemanesh,

Introduction Lead-based shields are the most widely used attenuators in X-ray and gamma ray fields. The heavy weight, toxicity and corrosion of lead have led researchers towards the development of non-lead shields. Materials and Methods The purpose of this study was to design multi-layered shields for protection against X-rays and gamma rays in diagnostic radiology and nuclear medicine. In this...

Journal: :journal of biomedical physics and engineering 0
m. r. aghamiri associate professor of medical physics, medical physics & engineering department, school of medicine, shahid beheshti university of medical sciences, tehran, iran s. m. j. mortazavi professor of medical physics, medical physics & engineering department, school of medicine, shiraz university of medical sciences, shiraz, iran m. tayebi master student of radiobiology and radiation protection, shahid beheshti university of medical sciences, tehran, iran m. a. mosleh-shirazi assistant professor of medical physics, radiotherapy department, school of medicine, shiraz university of medical sciences, shiraz, iran h. baharvand assistant professor of polymer chemistry, iran polymer institute, tehran, iran a. tavakkoli-golpayegani assistant professor of medical engineering (biomechanics), medical physics & engineering department, school of medicine, shiraz university of medical sciences, shiraz, iran

background: lead-based radiation shields are widely used in radiology departments to protect both workers and patients from any unnecessary exposure to ionizing radiation. recently there has been a great deal of concern expressed about the toxicity of lead. human lead toxicity is well documented. in that light, production of environmentally-friendly lead-free radiation shields with less weight ...

Journal: :iranian journal of medical physics 0
behrouz rasuli department of radiology technology, behbahan faculty of medical sciences, behbahan, iran mohamad javad tahmasebi birgani department of radiation therapy, golestan hospital, ahvaz jundishapur university of medical sciences, ahvaz, iran

introduction quality control techniques used to test the components of the radiological system and verify that the equipment is operating satisfactorily. in this study, quality control (qc) assessment of conventional radiology devices was performed in frequently visited radiology centers of khuzestan province, iran. materials and methods fifteen conventional radiology devices were examined, bas...

A. Tavakkoli-Golpayegani B. Zeinali-Rafsanjani H. Baharvand M. A. Mosleh-Shirazi M. R. Aghamiri, M. Tayebi S. M. J. Mortazavi

Background: Lead-based radiation shields are widely used in radiology departments to protect both workers and patients from any unnecessary exposure to ionizing radiation. Recently there has been a great deal of concern expressed about the toxicity of lead. Human lead toxicity is well documented. In that light, production of environmentally-friendly lead-free radiation shields with less weight ...

Introduction: The ionizing radiation is increasingly applied in various fields for industrial and medical purposes due to its benefits. The aim of this study was to measure the radiation levels in six radiology departments of two educational hospitals in Ahvaz, Iran. Materials and Methods: The radiation levels were measured at six locations of six radiology departments, including behind the pat...

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