نتایج جستجو برای: radiation systems
تعداد نتایج: 1402818 فیلتر نتایج به سال:
The usage of digital radiology systems with insufficient quality control of digital image detectors can efface inherent superiorities of digital systems in comparison with analogue radiology systems and even makes an increased level of patients’ radiation doses. Modulation transfer function (MTF) is one of the most important parameters related to image quality and digital detectors efficiency. ...
Predicting the response of components or systems exposed to ionising radiation is often very difficult. Reliable radiation tolerance estimates therefore typically rely on extended radiation experiments. SCK·CEN, the Belgian Nuclear Research Center, is operating different gamma irradiation facilities, with wide gamma dose rates ranging from 0.1 Gy/h up to 50 kGy/h and with environmental control ...
background: recently, there have been many studies on the harmful effects of radiation and the regulations on radiation safety have been toughened both at the in nation and abroad. this study aims to identify the perceptions and actions taken as to radiation safety, and the degree of knowledge related to radiation held by the radiologists working in large hospitals. materials and methods: the r...
Abstract Theories with massive gravitons have peculiarity called the van Dam-Veltman-Zakharov discontinuity in that theory propagator does not go to massless graviton zero mass limit. This results large deviation Newtons law for theories even when vanishes. We test vDVZ single vertex process namely gravitational radiation from a classical source. calculate compact binaries using perturbative Fe...
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