نتایج جستجو برای: radiation monitoring
تعداد نتایج: 531766 فیلتر نتایج به سال:
In order to establish a Radiation Protection Plan or a Radiation Emergency Plan, Brazilian facilities should take into account all procedures based on national and international guidelines and recommendations. This information can be found in several documents published by different organizations over the past decades: the International Commission on Radiological Protection (ICRP), Internationa...
Minimizing radiation exposure while optimizing image quality is critical in diagnostic medical imaging. Radiologic technologists face complex challenges when implementing dose monitoring and reporting systems to assist in radiation safety efforts. Challenges include communicating the risks of radiation exposure, handling variations in dose measurement techniques, and working with a lack of stan...
Introduction: Radiography plays an important role in the diagnosis of oral and dental disease and one of the most common diagnostic procedures in dentistry. Recent reports have raised concern about the increased use of ionizing radiation in dental imaging and the possibility of cancers. The effective dose of some dental radiographic examinations is high enough, so appropriate ...
PURPOSE The nitroxide free radical, Tempol, was evaluated for potential differential radiation protection of salivary glands and tumor using fractionated radiation. Mechanistic information was explored by monitoring the presence and bioreduction of Tempol in both tissues noninvasively by magnetic resonance imaging (MRI). EXPERIMENTAL DESIGN Female C3H mice were immobilized using custom-made L...
Use of carbon nanotubes (CNTs) in dosimetry is a promising technique for real time in vivo dose measurements with high resolution for nuclear medicine and also dose rate monitoring for radiation protection utilizations. In this research with respect to extraordinary electrical properties of CNTs for several order of magnitudes increasing in electrical conductivity of polymeric matrix, the idea ...
Digital Holographic interferometry is a powerful and widely used optical technique for accurate measurement of variations in physical quantities such as density, refractive index, and etc. In this study, an experimental digital holographic interferometry setup was designed and used to measure the amount of energy changes induced by absorption of radiation from a non-ionizing infrared laser beam...
Nuclear energy offers the opportunity of meeting a significant contribution in diverse electricity portfolio of many countries. However, like many other technological achievements it suffers from the potential of probable accidents which are capable of doing harm to human beings and the environment. Therefore, emergency planning to encounter nuclear accidents including preparatory plans for ope...
European co-operation on the measurement of environmental external dose rates has been remarkable in the last twenty years. The experience gained under different European Commission Contracts in the monitoring of the external environmental radiation (gamma and cosmic) has permitted to establish common procedures and get a good degree of harmonization within the participants. In 1994, an EURADOS...
PURPOSE Stereotactic body radiation therapy (SBRT) allows for high radiation doses to be delivered to the pancreatic tumors with limited toxicity. Nevertheless, the respiratory motion of the pancreas introduces major uncertainty during SBRT. Ultrasound imaging is a non-ionizing, non-invasive, and real-time technique for intrafraction monitoring. A configuration is not available to place the ult...
A questionnaire was developed by the members of WG12 of EURADOS in order to establish an overview of the current status of eye lens radiation dose monitoring in hospitals. The questionnaire was sent to medical physicists and radiation protection officers in hospitals across Europe. Specific topics were addressed in the questionnaire such as: knowledge of the proposed eye lens dose limit; monito...
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