Radiation Interactions With Cerrobend Metal Rapidly Solidified From Melt
نویسنده
چکیده
Mustafa Kamal, Abu-Bakr El-BediwiTamer Dawod* and Adel. S. Waqlan** Metal Physics Lab. Physics Department, Faculty of Science –Mansoura University, Egypt. * Medical Physics Unit, Clinical Oncology and Nuclear Medicine Dept., Faculty of Medicine, Mansoura University **On leave, M.sc student, Ministry of Higher Education, Yemen. [email protected], [email protected] [email protected], [email protected]
منابع مشابه
Comparison between Clinically Used Irregular Fields Shielded by Cerrobend and Standard Lead Blocks
Introduction: In radiation therapy centers across Iran, protection of normal tissues is usually accomplished by either Cerrobend or lead block shielding. In this study, the influence of these two shielding methods on central axis dose distribution of photon beam a Cobalt unit was investigated in clinical conditions. Materials and Methods: All measurements were performed for 60Co γ-ray beams an...
متن کاملTEM INVESTIGATION OF RAPIDLY SOLIDIFIED NDFEB HARD MAGNETIC MATERIAL
The surface condition and microstructure of near stoichiometric (Fe823Ndll.8B5.9) Nd-Fe-B alloy ribbons and the effect of melt spinning parameters were investigated using optical, scanning and transmission electron microscopes (SEM, TEM). The formation of gas pockets on the roll surface of the ribbons during melt spinning can prevent heat transform and result in local coarse grains. The local t...
متن کاملComparison between Clinically Used Irregular Fields Shielded by Cerrobend and Standard Lead Blocks
INTRODUCTION In radiation therapy centers across Iran, protection of normal tissues is usually accomplished by either Cerrobend or lead block shielding. In this study, the influence of these two shielding methods on central axis dose distribution of photon beam a Cobalt unit was investigated in clinical conditions. MATERIALS AND METHODS All measurements were performed for 60Co γ-ray beams and...
متن کاملRefining grain structure and porosity of an aluminium alloy with intensive melt shearing
Intensive melt shearing was achieved using a twin-screw machine to condition an aluminium alloy prior to solidification. The results show that intensive melt shearing has a significant grain-refining effect. In addition, the intensive melt shearing reduces both the volume fraction and the size of porosity. It can reduce the density index from 10.50% to 2.87% and the average size of porosity in ...
متن کاملThe evaluation of change in attenuation coefficient of cerrobend block used for radiation protection of healthy tissues in megavoltage photon radiation therapy after multiple melting
Introduction: Protecting the vital organs in radiation therapy is one of the most important issues. Cerrobend alloy, the most common material used as the shield, is melted several times and used for different patients. In this study changes in attenuation coefficient of cerrobend due to melting was investigated. Materials and Methods: In melting furnace, ...
متن کامل