The number of Positron Emission Tomography (PET) centers has been growing rapidly. Many of the new facilities have been retrofitted into existing imaging centers and hospitals. Space in the facilities is often cramped, resulting in the hot lab, patient quiet rooms, and the scanners frequently being placed in close proximity to uncontrolled areas where non-occupational dose limits apply. Of part...

Introduction: This study introduces a novel polyvinyl chloride (PVC)/tungsten composites with characterization of their shielding properties by employing different techniques. Methods: The PVC/tungsten composites were produced by employing various weight fractions of tungsten micro-particles including 0, 20, and 40 % wt via melt blending method. In the next st...

conclusions available shields for the thyroid and eyes should be implemented in clinical practice. further research is needed to demonstrate the prevalence of shielding in the clinical setting. results only a limited number of studies have been performed on the use of shields for the eyes and thyroid, but the evidence shows an overall benefit to their use. this study demonstrates how thyroid sh...

Space debris is a serious threat to space travel. Even small fragments are enough damage or destroy satellites. To protect against debris, satellites have protective shields, which come in various forms. These shields must be optimized not only for impact protection but also secondary factors such as weight and size. New shield systems can tested experimentally with high-speed guns. This requir...

background: polyethylene composites including boron can be used as an effective neutron shield. our investigation focuses on manufacturing borated polyethylene nano-composite. the purpose of this study is to design a radiation shield for use in both neutron and gamma fields. materials and methods: borated polyethylene shields containing 2%, and 5% weight percentage of boron nano-particles were ...