<abstract xmlns="http://www.w3.org/1999/xhtml"><p>This study aims to investigate and evaluate the secondary photons characterizations under flattening filter (FF) for high radiotherapy quality in terms of fluence, energy fluence, energy fluence distribution, spectral distribution and angular spread distribution of secondary photons, which are mainly coming from primary collimator originated in the whole Linac head. However, the flattening filter illuminates the photons of low energy. After this component, the secondary photons of low energy are coming from flattening filter and secondary collimators that contaminate the dosimetry for deep tumor treatment.</p><p>Fluence profile, energy profile and angular spread of secondary photons decreased with FF volume reduction percent but energy distribution and spectral distribution kept almost constant with FF volume reduction. The FF volume reduction allows reducing the secondary photons emergent from FF in number and in energy and it permits to increase the radiotherapy efficiency by decreasing the photons contamination when the cancer is treating.</p></abstract>

This study aims to investigate and evaluate the secondary photons characterizations under flattening filter (FF) for high radiotherapy quality in terms of fluence, energy fluence, energy fluence distribution, spectral distribution and angular spread distribution of secondary photons, which are mainly coming from primary collimator originated in the whole Linac head. However, the flattening filter illuminates the photons of low energy. After this component, the secondary photons of low energy are coming from flattening filter and secondary collimators that contaminate the dosimetry for deep tumor treatment.Fluence profile, energy profile and angular spread of secondary photons decreased with FF volume reduction percent but energy distribution and spectral distribution kept almost constant with FF volume reduction. The FF volume reduction allows reducing the secondary photons emergent from FF in number and in energy and it permits to increase the radiotherapy efficiency by decreasing the photons contamination when the cancer is treating.

Study of the volume reduction impact on secondary photons emergent from flattening filter for high radiotherapy quality

Physics Department, Faculty of Sciences Dhar El-Mahraz

Polish Journal of Medical Physics and Engineering

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

This study aims to investigate and evaluate the secondary photons characterizations under flattening filter (FF) for high radiotherapy quality in terms of...

Study of the volume reduction impact on secondary photons emergent from flattening filter for high radiotherapy quality

Published Online: Mar 28, 2019

Page range: 23 - 28

Received: Oct 04, 2018

Accepted: Jan 20, 2019

DOI: https://doi.org/10.2478/pjmpe-2019-0004

Keywords
flattening filter, Monte Carlo simulation, secondary photons, BEAMnrc code, BEAMDP code

© 2019 Mohamed Bencheikh et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Study of the volume reduction impact on secondary photons emergent from flattening filter for high radiotherapy quality

Published Online: Mar 28, 2019

Page range: 23 - 28

Received: Oct 04, 2018

Accepted: Jan 20, 2019

DOI: https://doi.org/10.2478/pjmpe-2019-0004

Keywordsflattening filter, Monte Carlo simulation, secondary photons, BEAMnrc code, BEAMDP code

© 2019 Mohamed Bencheikh et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Keywords
flattening filter, Monte Carlo simulation, secondary photons, BEAMnrc code, BEAMDP code