نتایج جستجو برای: radiation field workers
تعداد نتایج: 1102927 فیلتر نتایج به سال:
For pandemic influenza planning, realistic estimates of personal protective equipment (PPE) and antiviral medication required for hospital healthcare workers (HCWs) are vital. In this simulation study, a patient with suspected avian or pandemic influenza (API) sought treatment at 9 Australian hospital emergency departments where patient-staff interactions during the first 6 hours of hospitaliza...
Background: An effective method for management of large and bulky malignant tumors. This treatment modality is also known as Specially Fractionated Radiation Therapy (SFRT). In this treatment technique a grid block converted the open radiation field into a series of pencil beams. Dosimetric characteristics of an external beam grid radiation field have been investigated using experimental and Mo...
background: in conventional radiation therapy, regarding normal tissue tolerance, the treatment of bulk tumors is one of the remaining challenges. grid radiation therapy (grt) is a technique to deliver high doses, approximately 15 – 20 gy per fraction, to several small volumes located in a large radiation field. this can be performed using a grid block. the current work has concentrated on the ...
A cytogenetic study was carried out on 359 clean-up workers who worked at the Chernobyl station in 1986-1989. The investigation was performed 6-12 years after irradiation. Chromosome type damages, i.e. double fragments, dicentrics and rings were significantly increased in the cleanup workers compared to the control. Chromatid exchanges were found only in the clean-up workers. A temporal change ...
This study analyzes the prevalence of thyroid disease in healthcare workers who have worked at the University Hospital in Pisa. They underwent a health surveillance protocol from 2 January 2005 to 1 July 2009 with particular regard to occupational exposure to ionizing radiation. Data of health care workers were obtained by consulting Asped 2000: computerized medical records used by the Universi...
introduction: ionizing radiations are the hazardous agents in the workplace and all forms of ionizing radiation produce some type of injuries. awareness of application of protection guidelines and knowledge of the principles of radiation protection can play an important role in health of employees. survey of radiation employee’s levels of awareness and practical behavior is essential and should...
Radiation-induced free radicals are considered to initiate and perpetuate the action of ionizing radiation (IR) on living organisms, causing mutations, cell apoptosis or even genetic instability. Oxidative processes play an important role in the pathogenesis of several diseases (e.g. neurodegenerative and cardiovascular diseases or cancer). In contrast, some authors state that a ‘radiation adap...
The yield of chromosomal aberrations was analyzed in peripheral blood cultures to estimate the level of radiation exposure in workers from a radioprotection department. The subjects were exposed at low level dose rate (external exposure) to alfa, beta and gamma rays for time periods ranging between 7 and 34 years. We found a higher frequency of dicentrics and acentrics than in the control group...
We performed a study on the presence of chromosome aberrations in a cohort of plutonium workers of the Mayak production association (PA) with a mean age of 73.3 ± 7.2 years to see whether by multi-color fluorescence in situ hybridization (mFISH) translocation analysis can discriminate individuals who underwent occupational exposure with internal and/or external exposure to ionizing radiation 40...
BACKGROUND Ionizing radiation at very high (radio-therapeutic) dose levels can cause diseases other than cancer, particularly heart diseases. There is increasing evidence that doses of the order of a few sievert (Sv) may also increase the risk of non-cancer diseases. It is not known, however, whether such effects also occur following the lower doses and dose rates of public health concern. ME...
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