Measurement of Dose Distribution for Co – 60Teletherapy Unit

. -60 (10x10 cm) (15x15 cm) (0.0 gm /cm , 0.36 gm /cm and 0.55 gm /cm) . (MATLAB) .Both percentage depth dose and off axis dose are usually needed in order to arrive at a suitable treatment plan. In an attempt to get an isodose curves in the build-up region , the dose distribution from Co-60 teletherapy machine in a planes perpendicular to the beam axis have been measured near the surface and in the build - up region , using LiF Teflon thermoluminescent dosimeters in a Perspex phantom for (10x10 cm) and (15x15 cm) field size , and for three depths (0.0 g/cm , 0.36 g/cm and 0.55 g/cm).The measured data is computer fitted to an empirical formula using MATLAB program , and the dose distribution for different other depths have been predicted.