introduction:  all of  the  people worldwide  are exposed  to  low levels  of  radiation. cancer induction  and  genetic disorders are among the hazards of low level exposure. in some cases, radiation close to hot springs is  higher than normal areas due to a high concentration and the decay products of ra-226. given the use of hot  springs by the general public  because  of their therapeutic p...

Ultraviolet (UV) radiation treatment is an effective method for purifying pollutant water contaminated with bacteria and/or chemicals. As emerging technology, purification by deep ultraviolet light-emitting diodes (DUV-LEDs) promising. Few studies have used the point-source characteristics of LEDs and instead replaced mercury vapor lamps LEDs. Here, we show our recent progress in instantaneous ...

Introduction; Fetal monitoring of instantaneous heart rate (IHR) is one of major advances in recent perinatal medicine. It is widely accepted that changing pattern of fetal IHR associated with uterine contraction will reflect fetal well or ill being. Uterine contraction produces temporary hypoxia to the fetus and apnea does the same to the neorlate. Therefore we analysed changing patterns of ne...

introduction: patients administered with a therapeutic dose of 131i for thyroid cancer treatment are potential sources of unacceptably high radiation exposure to other individuals, particularly the patient's immediate family members. the aim of this study is to investigate effects of early liothyronine consumption after radio-iodine therapy on accumulated dose and exposure rate in patients with...

We have developed a compact microbeam radiation therapy device using carbon nanotube cathodes to create a linear array of narrow focal line segments on a tungsten anode and a custom collimator assembly to select a slice of the resulting wedge-shaped radiation pattern. Effective focal line width was measured to be 131 μm, resulting in a microbeam width of ∼300 μm. The instantaneous dose rate was...

background: the existence of some radionuclides in soil and some building materials produce a β-γ radiation field, which in some regions the exposure of these radionuclides to human is high. materials and methods: the air-absorbed dose, indoor and outdoor annual effective dose of soil and some building material samples (ceramic, granite, gypsum, etc.). the samples were collected from 35 differe...