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

• Autorzy: Bencheikh Mohamed , Maghnouj Abdelmajid , Tajmouati Jaouad , Didi Abdessamad

Identyfikatory

DOI

10.2478/pjmpe-2019-0004

• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

flattening filter; Monte Carlo simulation; secondary photons; BEAMnrc code; BEAMDP code

• Wydawca: Polskie Towarzystwo Fizyki Medycznej ; De Gruyter
• Czasopismo: Polish Journal of Medical Physics and Engineering
• Rocznik: 2019
• Tom: Vol. 25, Iss. 1
• Strony: 23--28
• Opis fizyczny: Bibliogr. 17 poz., rys.

Twórcy

autor

Bencheikh Mohamed

• LISTA Laboratory, Physics Department, Faculty of Sciences Dhar El-Mahraz, University of Sidi Mohamed Ben Abdellah, Fez, Morocco

autor

Maghnouj Abdelmajid

• LISTA Laboratory, Physics Department, Faculty of Sciences Dhar El-Mahraz, University of Sidi Mohamed Ben Abdellah, Fez, Morocco

autor

Tajmouati Jaouad

• LISTA Laboratory, Physics Department, Faculty of Sciences Dhar El-Mahraz, University of Sidi Mohamed Ben Abdellah, Fez, Morocco

autor

Didi Abdessamad

• LISTA Laboratory, Physics Department, Faculty of Sciences Dhar El-Mahraz, University of Sidi Mohamed Ben Abdellah, Fez, Morocco

Bibliografia

• [1] Bencheikh M, Maghnouj A, Tajmouati J. Photon beam softening coefficients evaluation for a 6 MV photon beam for an aluminum slab: Monte Carlo study using BEAMnrc code, DOSXYZnrc code and BEAMDP code. Moscow Univ Phys. 2017;72(3): 263-270.
• [2] Bencheikh M, Maghnouj A, Tajmouati J. Photon Beam Softening Coefficient Determination with Slab Thickness in Small Filed Size: Monte Carlo Study. Phys Part Nuclei Lett (PEPAN). 2017;14(6):963-970.
• [3] Bencheikh M, Maghnouj A, Tajmouati J. Energetic properties’ investigation of removing flattening filter at phantom surface: Monte Carlo study using BEAMnrc code, DOSXYZnrc code and BEAMDP code. Phys Part Nuclei Lett (PEPAN). 2017;14(6):953-962.
• [4] Bencheikh M, Maghnouj A, Tajmouati J. Dosimetry Investigation and Evaluation for Removing Flattening Filter Configuration of Linac: Monte Carlo Study. Moscow Univ Phys. 2017;72(6):640-646.
• [5] Bencheikh M, Maghnouj A, Tajmouati J. Relative Attenuation and Beam Softening Study with Flattening Filter Volume Reduction: Monte Carlo Study. Moscow Univ Phys. 2017;72(6):647-652.
• [6] Bencheikh M, Maghnouj A, Tajmouati J. (2017), Study of Possibility to Reduce Flattening Filter Volume for Increasing Energetic Photons for High Radiotherapy Efficiency. Moscow Univ Phys. 2017;72(6):653-657.
• [7] Bencheikh M, Maghnouj A, Tajmouati J. Study of photon beam dosimetry quality for removing flattening filter linac configuration. Ann Univ Craiova Physics AUC. 2017;27:50-60.
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• [13] Rogers DWO, Kawrakow I, Seuntjens JP, et al. NRC User Codes for EGSnrc. NRCC Report, Ottawa, 2013. pp 6-83.
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• [15] Low DA, Dempsey JF. Evaluation of the gamma dose distribution comparison method. Med Phys. 2003;30(9):2455-2464.
• [16] IAEA Technical Reports Series No.430. Commissioning and Quality Assurance of Computerized Planning Systems for Radiation Treatment of Cancer. International Atomic Energy Agency, Vienna. 2004.
• [17] IAEA-TECDOC-1540. Specification and Acceptance Testing of Radiotherapy Treatment Planning Systems. International Atomic Energy Agency, Vienna. 2007

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).