Study of radiation protection for Elekta medical linear accelerator

The incidence of cancer throughout the world is increasing with the prolonged life expectancy that has resulted from improvements in standards of living. About half of all cancer patients receive radiotherapy, either as part of their primary treatment or in connection with recurrences or palliation. The International Atomic Energy Agency [IAEA] has estimated that approximately 2500 teletherapy machines were in use in 1998 in developing countries and that 10000 such machines may be needed by 2015. The preparation of this Safety paper was initiated as a result of an expected increase in the construction of radiotherapy facilities, and in response to Member States that have requested practical guidance regarding the design and shielding of such facilities[1] In this work, The Harshaw Model 4500 Manual TLD Reader was used for Thermo Luminescence Dosimetry [TLD] by using a set of 20 chips Dosimeter TLD-1 00. A comprehensive set of measurements were performed for five different sites inside and outside the accelerator. The obtained results showed agreement with published data in some location while the results of the working staff site were within the limits of the recommended permissible dose where it was about 0.5 m Sievert per year

study of some trace elements in fingernail and hair of Egyptian bilharzial patients using short neutron activation

The concentration of 10 elements has been determined in fingernail and hair of four groups representing normal and hepatosplenic [bilharzial] subjects. Samples were collected from rural inhabitants to the east of Alexandria City and irradiated with thermal neutrons from a Triga Mark III Reactor, for 10 minutes. Measurements were made using HPGe detector, ADC and PDP 11 /34. The analysis were performed using the RAYGUN program. The results showed an increase in the concentration of AI, Cl and I in both fingernail and hair of bilharzial patients than normal while Mg, Ca, K, Mn, Cu, and Sr decreased. Most of the elements showed a higher concentration in fingernail than in hair