نتایج جستجو برای: patient radiation protection
تعداد نتایج: 1097789 فیلتر نتایج به سال:
Many human biology features may be explained by the absence of inverse correlation between T3 and T4 (except in the case of patients with thyroid diseases). The health of Russian cosmonauts may be superior to that of US astronauts because of the use of reserpine for radioprotection in the USA. As long as biologic age is inversely correlated to the α2-macroglobulin/α1-protease inhibitor ratio, s...
We carried out a questionnaire survey to determine the actual situation of radiation safety management measures in all medical institutions in Japan that had nuclear medicine facilities. The questionnaire consisted of questions concerning the evaluation of shielding capacity; radiation measurement; periodic checks of installations, equipment, and protection instruments; and the calibration of r...
Future deep space mission and International Space Station exposures will be dominated by the high-charge and -energy (HZE) ions of the Galactic Cosmic Rays (GCR). A few mammalian systems have been extensively tested over a broad range of ion types and energies. For example, C3H10T1/2 cells, V79 cells, and Harderian gland tumors have been described by various track-structure dependent response m...
Operator radiation exposure is an important occupational hazard compounded over the course of an interventional radiologist's career. This study compared operator radiation dose to the eye and head for different positions around the patient. Compared with cases performed from the femoral region, exposures were 1.8 times higher at the side, and 1.6 times higher at the head, using conventional ap...
the aim of this study was to investigate the radioprotective effect of thymol as a natural product against salivary glands dysfunction induced by ionizing radiation in rats. the rats were treated with thymol at dose of 50 mg/kg before exposure to radiation at dose 15gy. salivary gland function was evaluated with radioisotope scintigraphy and then salivary gland to background counts ratio was ca...
Background and aims: Using X-ray for diagnostic test, is one of the most important exposure to radiation sources for general population and in particular for radiation workers. Therefore, holding down the pollution at the lowest possible level is very important for protection against the internal exposure. The objective of this study is to survey the scattered X-ray rate and received dose by st...
The high demand for more intense neutrino beams is closely related to an increase of the production of radioactive isotopes in target caverns, decay tunnels and hadron stop areas. This paper gives a (short) summary of radiation protection lessons learned from the past CERN neutrino facility WANF and also from presently operating facilities like NuMI or CNGS.
The purpose of this contribution is to situate the radon issue within the whole field of radiation protection. There is among health physicists a fairly general consensus that exposure to radon decay products constitutes the largest and most variable contribution to the population exposure. It is therefore ironical that precisely this exposure is the subject of constant disputes with regard to ...
Risks of serious hereditary damage in the first and second generations after low level radiation exposure and at equilibrium were calculated by using a doubling dose of 100 rem (based on experimental work with the mouse) and by considering separately the various categories of genic and chromosomal defect. Prenatal lethality has not been included. It is estimated that after the exposure of a pop...
Introduction Recently, owing to the increase of synchrotron radiation facilities such as SPring-8, dose measurements of high-intense low-energy photons are increasingly needed for radiation protection and medical researches. For the dose measurement, tissue equivalence of dosimeter material becomes important. A radiochromic film that has sensitivity in the dose region of several Gy to 100 Gy ha...
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