نتایج جستجو برای: thermoluminescence detector
تعداد نتایج: 59673 فیلتر نتایج به سال:
Background and Objective: Human external exposure to natural radiation sources is much more than artificial radiation sources. In this study, external annual effective doses were estimated in cities of Gorgan and Bandar-Torkman by determining ambient gamma dose rate in indoor and outdoor spaces. Materials and Methods: Using an ionization chamber detector, the outdoor and indoor ambient gamma d...
BACKGROUND AND PURPOSE Volume-of-interest C-arm CT is a novel technique for imaging of intracranial high-contrast objects. We performed this study to evaluate the potential diagnostic value and radiation dose reduction of this technique for imaging of intracranial stents and flow diverters. MATERIALS AND METHODS Twenty-seven patients were imaged with a VOI C-arm CT scan following treatment wi...
nowadays, radiography is a necessary procedure in diagnosis and treatment of patients with dental problems. according to the alara (as low as reasonably achievable) principle, dentists must take radiographs of sufficient quality at the lowest possible radiation dose to the patients. the assessment of patient dose on panoramic radiography is difficult because of dynamic nature of the imaging pro...
Background information: Electromagnetic radiation is the transmission of energy in the form of waves having an electric and magnetic component. Almost all forms of electromagnetic radiation, which constitute the electromagnetic spectrum, such as radio waves, visible, infrared, and uliraviolet light, X-rays and gamma rays, are employed in the contemporary Hospital. There are some crucial decisio...
Absorbed dose rate measurements of a 50 kV(p) handheld X-ray probe source in a water phantom are described. The X-ray generator is capable of currents of up to 40 microA, and is designed for cranial brachytherapy and intraoperative applications with applicators. The measurements were performed in a computer-controlled water phantom in which both the source and the detectors are mounted. Two dif...
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