نتایج جستجو برای: diagnostic radiation fields

تعداد نتایج: 751516  

A. Ali Ghanbari, E. Kazemi, F. Zal, H. Mozdarani, S. Haghdoost, S. Sharif-Zadeh, S.M.J. Mortazavi, Z. Mostafavi-pour,

Background: Induction of cellular response after exposure to electromagnetic fields is limited to coherent fields. An incoherent noise field is supposed to suppress the bioeffects of regular RF electromagnetic fields. The purpose of this study was to investigate the effect of GSM mobile phone-induced radiofrequency (RF) on the induction of oxidative stress in SP2/0 cell line. Materials and Meth...

2015
Oliver Hupe Hayo Zutz Jana Klammer

The application of pulsed radiation fields for research, security screening and medical examinations has increased remarkably in the last years. Testing of active personal and area dosemeters for the operation in pulsed radiation fields is a necessity to judge the suitability of the dosemeter. Up to now, radiation protection dosemeters have only been tested in continuous fields, although they a...

Journal: :iranian journal of medical physics 0
erfaneh kargar student research committee, hormozgan university of medical sciences, bandar abbas, iran wrya parwaie department of radiology, faculty of para-medicine, hormozgan university of medical sciences, bandar abbas, iran bagher farhood department of medical physics and biomedical engineering, school of medicine, tehran university of medical sciences, tehran, iran zahra atazadegan student research committee, hormozgan university of medical sciences, bandar abbas, iran mahdieh afkhami ardekani department of radiology, faculty of para-medicine, hormozgan university of medical sciences, bandar abbas, iran

introduction this study was conducted to evaluate the radiographers’ awareness of radiation protection principles in the radiology centers of the hospitals of bandar abbas, iran. materials and methods this analytical cross-sectional study was conducted on 50 radiographers of three hospitals affiliated with hormozgan university of medical sciences in 2015. the data were collected using a two-par...

Journal: :journal of biomedical physics and engineering 0
a rafati s rahimi a talebi a soleimani m haghani s m j mortazavi

introduction : the fast-growing telecommunication and wireless technologies has led to more dependence to these communication devices and higher levels of exposure to electromagnetic radiations propagated by cellular devices and their service towers. to disable signaling in places where silence is valued or where information quarantine measures are required, mobile phone jammers emit radiofrequ...

Journal: :journal of biomedical physics and engineering 0
a haghnegahdar h khosrovpanah a andisheh-tadbir gh mortazavi m saeedi moghadam smj mortazavi

background : effects of electromagnetic fields on healing have been investigated for centuries. substantial data indicates that exposure to electromagnetic field can lead to enhanced healing in both soft and hard tissues. helmholtz coil is a device that generates pulsed electromagnetic fields. objective : in this study, a pair of helmholtz coils for enhancing the healing process in periodontiti...

ذبیح زاده, منصور, کرمی, وحید,

Background and purpose: Increasing number of patients undergoing x-ray examinations has created a global concern due to the deleterious biological effects associated with x-ray exposure. Adherence to ionizing radiation protection principles could be of great benefit in decreasing these effects. Accordingly, the aim of this study was to survey radiation protection in diagnostic x-ray imaging in ...

C.H. Rim, D.S. Yang, J.S. Choi, Y.B. Kim,

Background: Breast cancer is a common disease in radiation oncology. We evaluated the radiation dose received by breast cancer patients, an often-neglected concern. Materials and Methods: The total effective radiation dose in 101 breast cancer patients was calculated by summing the effective doses of individual diagnostic imaging tests from the first hospital visit to the initiation of radiothe...

1995
Eric D. Carlson Li-Sheng Tseng

We investigate the detection of a pseudoscalar φ that couples electromagnetically via an interaction 1 4 gφF F̃ . In particular, we focus on the conversion of pseudoscalars produced in the sun’s interior in the presence of the sun’s external magnetic dipole field and sunspotrelated magnetic fields. We find that the sunspot approach is superior. Measurements by the SXT on the Yohkoh satellite can...

Journal: :Physical chemistry chemical physics : PCCP 2015
Kiminori Maeda Jonathan G Storey Paul A Liddell Devens Gust P J Hore C J Wedge Christiane R Timmel

We present a study of a carotenoid-porphyrin-fullerene triad previously shown to function as a chemical compass: the photogenerated carotenoid-fullerene radical pair recombines at a rate sensitive to the orientation of an applied magnetic field. To characterize the system we develop a time-resolved Low-Frequency Reaction Yield Detected Magnetic Resonance (tr-LF-RYDMR) technique; the effect of v...

2008
V. V. Skadorov S. I. Tiutiunnikov

In this work the interaction of electromagnetic field with quasi-periodic media has been scrutinized. We have obtained the formula for a distorted medium polarizability tenzor in the X-ray frequency band. Also there have been obtained the X-rays dynamic diffraction equations for the mediums with arbitrary smooth distortion. For these equations the Takagi-Tuipin equations are obtained as a parti...

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