نتایج جستجو برای: accidental dosimetry
تعداد نتایج: 35102 فیلتر نتایج به سال:
background: thermoluminescence dosimetry is one of the dosimetry procedures used widely as routine and personal dosimeters. in order to extend this kind of dosimeters, dental tissue has been examined and was found promising as a tld dosimeter. materials and methods : in this study, 70 health teeth were collected. the only criterion, which was considered for selection of the teeth, was the healt...
The growing use of ionizing radiation in various sectors of industry, medicine, agriculture and research has increased the risk of radiation exposure of staff and people. Ionizing radiation as a strong clastogen can cause different types of DNA damages and chromosomal aberrations. Biological dosimetry, based on the cytogenetic analysis of peripheral blood lymphocytes has a wide application in d...
A worsening of the accidental hazards linked to the use of ionizing radiation is currently being observed for four reasons. First, the increasing need for radiation sources in numerous industrial applications (food sterilization, construction, engineering...) leads to an increasing probability of loss of the sources or abnormal/unsuitable use and storage. Second, advances in medicine generate n...
The paper is devoted to review of development and application of EPR dosimetry with teeth in Ukraine. It deals with specific features of the EPR dosimetry protocol, which was developed and is practically used in SCRM for retrospective dosimetry of clean-up workers (liquidators). Extensive methodological research was conducted in SCRM in order to develop an original version of EPR dosimetric pro...
Electron paramagnetic resonance, thermoluminescence, and optically stimulated luminescence, with biological tissues inert materials are well established physical methods for retrospective dosimetry in acute accidental exposures. The objective of this article is to provide a view the questions still open, current challenges needed solutions. As research on emergency response encountering increas...
The experiences of the Chernobyl and Fukushima nuclear accidents showed that dosimetry was essential tool in emergency situation for decision making processes, such as evacuation application protective measures. However, at consequent post-accidental phases, it crucial also medical health surveillance further adaptation to changed conditions with regards radiation protection affected population...
Microbeam radiation therapy (MRT) using high doses of synchrotron X-rays can destroy tumours in animal models whilst causing little damage to normal tissues. Determining the spatial distribution of radiation doses delivered during MRT at a microscopic scale is a major challenge. Film and semiconductor dosimetry as well as Monte Carlo methods struggle to provide accurate estimates of dose profil...
The ultimate check of the actual dose delivered to a patient in radiotherapy can only be achieved by using in vivo dosimetry. This work reports a pilot study to test the applicability of a thermoluminescent dosimetric system for performing in vivo entrance dose measurements in external photon beam radiotherapy. The measurements demonstrated the value of thermoluminescent dosimetry as a treatmen...
In numerous biominerals exposed to ionizing radiation some stable paramagnetic species are induced. Their nature can differ depending on chemical composition of biominerals. The method of choice to study paramagnetic centers in biominerals is electron paramagnetic resonance (EPR) spectroscopy. When the relationship between EPR signal intensity of stable paramagnetic center and the dose has a li...
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