AN INVESTIGATION ON RADON AND THORON RESPONSE OF ALPHA-TRACK DETECTORS USED IN THE WINNIPEG CASE–CONTROL STUDY Jing Chen1,*, Bill Walker1, Atsuyuki Sorimachi2, Hiroyuki Takahashi2 and Shinji Tokonami2 Radiation Protection Bureau, Health Canada, 775 Brookfield Road, Ottawa, Canada K1A 1C1 Research Center for Radiation Protection, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-...

The year 2016 marks the 100th Year Anniversary milestone of radiological research at Columbia University. In 1916 Gioacchino Failla was appointed to operate the radon plant at Memorial Hospital in New York and set up the Biophysical Laboratory, which was later moved to Columbia University and named the Radiological Research Laboratory. Subsequently, it was renamed the Center for Radiological Re...

Conventional X-ray is not capable of visualizing microvessels with diameter less than 100 μm . Because of this limitation, radiological observation of renal microcirculation has not been realized. Synchrotron radiation is characterized by high photon flux and high natural collimation, and is capable of identifying microvessels with diameter of less than 50 μm . To establish a method which visua...

The United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR) was established in 1955 to systematically collect, evaluate, publish and share data on the global levels and effects of ionizing radiation from natural and artificial sources. Regular surveys have been conducted to determinate the frequencies of medical radiological procedure, the number of equipment and staffi...

This letter comments on the ongoing re-evaluation of the dose and dose rate effectiveness factor (DDREF) equal to 2.0, currently recommended by the International Commission on Radiological Protection. The topics of DDREF and threshold are related to the linear no-threshold theory (LNT), which does not take into account that DNA damage and repair are in dynamic equilibrium probably reached in a ...

Introduction: Radiation exposure during radiological examination is a health concern, of which radiology professionals should be cognizant. We sought to evaluate the radiation protection knowledge, attitudes, and practice (KAP) amongst radiology staff of hospitals across 10 provinces of Iran. Materials and Methods: For evaluating the level of radiation protection KAP, 553 radiology staff were e...

Fetal sensitivity to radiation-induced health effects is related to gestational age, and it is highly dependent on fetal dose. Typical fetal doses from diagnostic radiology are usually below any level of concern. Although rare, significant fetal radiation doses can result from interventional medical exposures (fluoroscopically guided techniques), radiation therapy, or radiological or nuclear in...

Department of Occupational and Environmental Health, Nagoya University Graduate School of Medicine, Nagoya City Public Health Research Institute, Department of Medical Technology, Nagoya University School of Health Sciences, Department of Environmental Dermatology, Nagoya University School of Medicine, Second Department of Internal Medicine, Nagoya University School of Medicine and Research Cen...

some areas of ramsar, a city in northern iran are among the world’s wellknown inhabited areas with highest levels of natural radiation. annual exposure levels in these areas are up to 260 mgy y‐1 and the mean exposure rate is about 10 mgy y‐1 for a population of about 2000 residents. if elevated levels of natural radiation as high as a few hundred msv per year is detrimental to health and leads...

background: humans beings are continuously exposed to ionizing radiation from natural sources. the main contributors to natural radiation are high-energy cosmic radiation and radioactive nuclides that originates in the earth’s crust. exposure to high levels of radiation can cause serious health effects. in this study an attempt has been made to monitor the levels of environmental background rad...