Background: Environmental gamma ray refers to the gamma radiation from terrestrial sources and building materials. In enclosed spaces radiation can become a health hazard leading to potential increase in the rates of lung cancer. The goal of this study is to assess the exposure to natural gamma radiation of children in the schools of Zanjan province. Method:The natural gamma radiation was asse...

exposure to radiation from different types of television sets was measured to ascertain the levels of hazards posed to the human biological system. measurement of the annual radiation dose hazards was performed using a halogen-quenched gm tube with thin mica end window having a density of 1.5 mg/cm2, effective window diameter of 0.360 inch and side wall of 0.012 inch thick. the gm tube was plac...

The provision of basic radiological services in rural, first-referral hospitals is an essential component of any country's attempt to achieve health for all. We report the results of a review of examination frequency trends, operator training background, and machine operational and safety status in the X-ray facilities in rural mission hospitals in Ghana in 1991-92. The radiological workload at...

The collective dose of radiation used in medical investigations and procedures has increased by greater than 700% between 1980 and 2006 [1]. Consequently the use of ionizing radiation has developed into an important, yet potentially avoidable, public health threat [2] that deserves considerable attention. This is particularly the case in adult cardiology patients where coronary angiography repr...

background: measurement of background radiation is very important from different points of view especially for human health. the aim of this survey was focused on determining the current background radiation in one of the highest altitude regions ( zagros mountains ), chaharmahal and bakhtiari province, in the south west of iran . materials and methods: the outdoors-environmental monitoring exp...

There is a great deal of uncertainty on how low (≤ 0.1 Gy) doses of ionizing radiation (IR) affect human cells, partly due to a lack of suitable experimental model systems for such studies. The uncertainties arising from low-dose IR human data undermine practical societal needs to predict health risks emerging from diagnostic medical tests' radiation, natural background radiation, and environme...

Nori NAKAMURA, Chuzo MIYAZAWA, Shozo SAWADA, Mitoshi AKIYAMA, A. A. AWA Department of Genetics and Department of Radiobiology, Radiation Effects Research Foundation, 5-2 Hijiyama Park, Minami-ku, Hiroshima 732, Japan, Department of Chemistry, Ohu University School of Dentistry, 31-1 Aza-Misumido, Tomita-machi, Koriyama 963, Japan, Department of Radiobiology, Research Institute for Radiation Bio...

Introduction: The present study investigated the relatively high concentrations of natural radionuclides in raw material that used in ceramic manufacturing, and estimated the occupational exposure due to these activity concentrations. Material and Methods: A high-purity Germanium detector was used to determine naturally occurring radionuclide...

according to the report published by the united nations scientific committee on the effects of atomic radiation (unscear) in 2000, ramsar city in northern iran, has some inhabited areas with the highest known natural background radiation levels in the world (1). the annual radiation absorbed dose in high background radiation areas (hbras) of ramsar is extraordinary high, reaching 260 msv that i...

the radionuclides 226ra, 232th and 40k concentrations measured as well as radiological parameters, for 14 granite samples that use in iran as building material were calculated. the measurements of the radioactivity concentrations were carried out at nuclear physics laboratory university of tabriz. this subject is important in environmental radiological protection, since granites are extensively...