Abstract

Determination of Energy Spectra in Water for 6 MV X Rays from a Medical Linac

Highlights

  • The purpose of this work was determination of energy spectra in water for the 6 MV X-ray beam generated by the linear medical accelerators — Clinac 2300 applied in many European oncology centers

  • The verification was performed by a comparison between the calculated and measured relative central-axis dose curves and relative dose profiles in water for chosen irradiation conditions i.e. for the radiation field sizes of 3 cm × 3 cm, 10 cm × 10 cm, 40 cm × 40 cm and for SSD = 100 cm

  • The estimated local dose differences do not exceed 4% and they are mostly less than 2% for the considered relative central-axis dose curves

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Summary

Introduction

The purpose of this work was determination of energy spectra in water for the 6 MV X-ray beam generated by the linear medical accelerators — Clinac 2300 applied in many European oncology centers. Energy spectra of therapeutic beams are applied in contemporary treatment planning systems. The spectra of therapeutic beam are valuable for constructors of medical linacs. There is a lack of extensive data comprising the energy spectra in water — the medium recommended by dosimetry protocols for dosimetry calculations and measurements. The Monte Carlo computer simulation is considered to be the most accurate method to derive these spectra. The experimental methods are mainly used to obtain the spectra (783)

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