Author/Authors :
Alam, M. Jahangir University of Dhaka - Department of Physics, Bangladesh , Rabbani, K.S. University of Dhaka - Department of Physics, Bangladesh , Zakaria, G.A. Cologne University Teaching Hospital, Germany , Hussain, S.M. Akram Bangabandhu Sheikh Mujib Medical University - Department of Oncology, Bangladesh , Kiber, Adnan University of Dhaka - Department of Applied Physics and Electronics, Bangladesh , Baig, Tanvir University of Dhaka - Department of Physics
Abstract :
Tissue phantom ratio (TPR), for square fields of various dimensions has been determined at varying depths in water. The dose in water has been measured at a fixed source-to-surface distance (SSD) of 100 cm and reference depth of 5 cm for 6 MV photon beam of Siemens Linear Accelerator Primus II in German Cancer Research Center (DKFZ), Heidelberg, Germany. A modified formula has been developed to calculate the TPR value for isocentric treatment. The present article describes the conversion of the measured data values into a comprehensive and consistent data set by the modified formula, that gives the TPR from Percentage Depth Dose (PDD) with depth as a function of field sizes from 10 mm x 10 mm upto 300 mm x 300 mm) and depth (from 0 mm to 300 mm).
