Surface Dose Measurements on Indigenously Made Female Pelvic Phantom Using MOSFET Dosimetric System and Pinpoint Ionization Chamber

Deepak Shrotriya; R.S.Yadav

Volume : VII, Issue : X, October - 2017

Surface Dose Measurements on Indigenously Made Female Pelvic Phantom Using MOSFET Dosimetric System and Pinpoint Ionization Chamber

Deepak Shrotriya, R. S. Yadav

Abstract :

Surface radiation dose measurements on an indigenously made inhomogeneous female pelvic phantom are carried out using MOSFET dosimetric system and pinpoint ionization chamber. The small measuring volume is advantageous for surface dosimetry. The percentage dose differences are calculated at the central axis point, boundaries and outside points of the radiation field between treatment planning system (TPS) given and direct measured dose values at the pre–defined points. The percentage dose differences are found to be within 3% and 8.5% at central axis and 14.5% and 21.5% at field boundary for MOSFET dosimeter and pinpoint ionization chamber.