Effects of flattening filter (FF) and flattening filter-free (FFF) beams on small-field and large-field dose distribution using the VMAT treatment plan

• Autorzy: Plaza Dominika J. , Orzechowska Klaudia M. , Ślosarek Krzysztof T.

Identyfikatory

DOI

10.2478/pjmpe-2021-0016

• Języki publikacji: EN

Abstrakty

EN

Introduction: The aim of the study was to evaluate the influence of flattening filter (FF) and flattening filter-free (FFF) beams on small-field and large-field dose distribution using the VMAT treatment plan. Material and methods: Dose distribution calculations were performed for the VMAT technique in two locations: the larynx (small irradiation field; average 30.1 cm2) and gynecology (large irradiation field; average 173.1 cm2) using X- 6MV flattening filter (FF) and flattening filter-free (FFF) beams. The following values were compared: the number of monitor units, minimum doses, average doses in PTV and maximum average doses in OaR (spinal cord – in larynx radiotherapy, bladder and rectum - in gynecological radiotherapy) and RPI (Radiation Planning Index) coefficient. Results and Discussion: The performed statistical tests indicate that there is a significant difference (p <0.05) between the number of monitor units in the irradiation of large (gynecological) fields between the FF and FFF beams. The dose distributions show no statistically significant differences between the flattening filter and flattening-free filter beams (regardless of the field size). Conclusions: Due to the smaller number of monitor units, it is recommended to use flattening filter beams (FF) for largefield radiotherapy.

Słowa kluczowe

EN

Flattening Filter-Free Beams; FFF; Flattening Filter Beams; FF; VMAT; Volumetric Modulated Arc Therapy

• Wydawca: Polskie Towarzystwo Fizyki Medycznej ; De Gruyter
• Czasopismo: Polish Journal of Medical Physics and Engineering
• Rocznik: 2021
• Tom: Vol. 27, Iss. 2
• Strony: 137--141
• Opis fizyczny: Bibliogr. 21 poz., rys., tab.

Twórcy

autor

Plaza Dominika J.

• Maria Skłodowska - Curie National Research Institute of Oncology, Gliwice Branch, Poland; Radiotherapy Planning Department

autor

Orzechowska Klaudia M.

• Maria Skłodowska - Curie National Research Institute of Oncology, Gliwice Branch, Poland; Radiotherapy Planning Department

autor

Ślosarek Krzysztof T.

• Maria Skłodowska - Curie National Research Institute of Oncology, Gliwice Branch, Poland; Radiotherapy Planning Department

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).