نتایج جستجو برای: x ray protection
تعداد نتایج: 838645 فیلتر نتایج به سال:
Radiation exposure dosimetry for the personnel is based on measurements of phantom studies. To determine effective dose values for different X-ray equipment, TLD-measurements were performed using an Alderson Phantom in the patient position and a second phantom in the typical position of the personnel. Various types of protective clothing as well as fixed shields were considered in the calculati...
background: a study has been conducted to assess two useful radiation protection indices, the annual per-capita effective dose equivalent (aed) and the genetically significant dose (gsd), from conventional diagnostic radiography in 10 counties with more than 1,886,000 inhabitants in khorasan province in iran. materials and methods: the health centre authorities of khorasan province were asked t...
لیگاند 5- برومو-سالیسیلیدین-ایمین-n,n دی متیل-اتیلن آمین، از واکنش 5- برومو-سالیسیل آلدهید و n,n- دی متیل-اتیلن دی آمین در حلال متانول و طی چهار ساعت تقطیر برگشتی تهیه گردید. سپس این لیگاند با اکسید وانادیوم(iv) استیل استونات، استات مس(ii) یک آبه، استات روی(ii) دو آبه و نیترات نیکل(ii) شش آبه با نسبت 1:2 و در حلال متانول به مدت دو ساعت واکنش داده، که به ترتیب کمپلکس-های[vol(acac)] ، [cu2l2(oac)...
کمپلکس [ptme(ppy)pph3]- فنیل پیریدینppy = 2 با( bix3( x= cl, br, i واکنش میدهد و محصولات cis-[ptme(x)2(ppy)pph3],3a, x=cl,3b, x= br, 3c, x= iوpt(x(ppy)pph3] 2b,x= i,2a,x=cl, بدست می آیند. برای اثبات محصول واکنش کمپلکس [ptme(ppy)pph3] با bii3 واکنش کمپلکس (pt(ii با i2 انجام شد و داده های به دست آمده از این واکنش با واکنش با bii3 در حلال مشابه مقایسه شد. این کمپلکس ها با طیف سنجی 1hnmr , 31pnmr و...
The continuing increase in the worldwide use of X-ray imaging has implications for radiation protection of medical staff. Much of the increased usage could be viewed as simply a workload issue with no particular new challenges. However, advances in technology and developments in techniques have seen an increase in the number of X-ray procedures in which medical personnel need to maintain close ...
Introduction: Head-and-neck cancer is the sixth most common cancer worldwide with the number of cases consistently increasing in developing countries. Successful development of effective, safe and cost effective nanoprobes for head-and-neck cancer targeting imaging is a big challenge. This study is aimed to develop cysteamine-folate conjugated gold nanoparticles (F-Cys-AuNPs) a...
Background: Intraoral radiographies are the most frequent X-ray examinations in humans. According to International Commission on Radiation Protection (ICRP) recommendations, the selection of a diagnostic reference level (DRL) should be specific to a country or region. Critica l organs such as thyroid gland are exposed to X-rays in intraoral radiography and these exposures should be kept as low ...
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