Dosimetric evaluation of VMAT automated breast treatment plans: Towards the establishment of an institutional plan acceptability criteria

• Autorzy: Acquah George Felix , Hasford Francis , Tagoe Samuel Nii Adu , Diakite Adama , Adjenou Victor , Osei Ernest

Identyfikatory

DOI

10.2478/pjmpe-2023-0020

• Języki publikacji: EN

Abstrakty

EN

Introduction: To evaluate the clinical suitability of the current facility-based treatment plan protocol in establishing acceptability criteria. Material and methods: Automated Volumetric Arc Therapy (VMAT) treatment plans were retrospectively evaluated for intact breast and chest-wall cancer patients from January 2021 to January 2023. Results: A total of 94 patients were planned and treated using automated contouring and VMAT planning technique. The number of patients planned and treated for intact breast and chest-wall were 41 (43.6%) and 53 (56.4%), respectively. The mean intact breast volumes for optimization (Brst_opt) receiving 95% and 105% of the prescribed doses were 92.80% ± 1.11 and 1.54% ± 1.02, respectively. Their corresponding mean chest-wall volumes for optimization (Chst_opt) were 90.65% ± 3.19 and 2.28% ± 2.99, respectively. For left-sided cases, the mean heart dose received was 4.61 Gy ± 1.76 and 5.18 Gy ± 1.55 for intact breast plans and that for chest-wall plans, respectively. The mean ipsilateral lung volume receiving 20 Gy of the prescribed dose was 12.22% ± 3.86 and 13.19% ± 3.74 for intact breast plans and chest-wall plans, respectively. For the Brst_opt and Chst_opt dose metrics were calculated; the mean homogeneity index (HI) was 0.14 ± 0.03 and 0.15 ± 0.04, mean uniformity index (UI) was 1.09 ± 0.03 and 1.11 ± 0.03, and mean conformity index (CI) were 0.92 ± 0.04 and 0.91 ± 0.04, respectively. Conclusions: The dosimetric evaluation shows a good dose distribution in the target volumes with minimal doses to the organs at risk (OAR). Assessment of the current data affirms the clinical usefulness of the facility-adopted protocol in achieving quality treatment plans for intact breast and chest-wall irradiations. The establishment of plan acceptability criteria will help achieve improved overall treatment outcomes.

Słowa kluczowe

EN

dosimetric indices; breast radiotherapy; plan quality; VMAT plan; acceptability criteria

• Wydawca: Polskie Towarzystwo Fizyki Medycznej ; De Gruyter
• Czasopismo: Polish Journal of Medical Physics and Engineering
• Rocznik: 2023
• Tom: Vol. 29, Iss. 4
• Strony: 185--194
• Opis fizyczny: Bibliogr. 22 poz., rys., tab.

Twórcy

autor

Acquah George Felix

• Medical Physics Department, Centre International de Cancerologie de Lomé, Togo

• https://orcid.org/0000-0002-7940-3675

autor

Hasford Francis

• Department of Medical Physics, School of Nuclear and Allied Sciences, University of Ghana - Legon, Ghana
• Radiological and Medical Research Institute, Ghana Atomic Energy Commission, Accra, Ghana

• https://orcid.org/0000-0003-0252-8004

autor

Tagoe Samuel Nii Adu

• Department of Medical Physics, School of Nuclear and Allied Sciences, University of Ghana - Legon, Ghana
• Medical Physics, National Radiotherapy Oncology and Nuclear Medicine Centre, Korle Bu Teaching Hospital, Ghana

• https://orcid.org/0000-0002-2515-5303

autor

Diakite Adama

• Radiation Oncology Department, Centre International de Cancerologie de Lomé, Togo

autor

Adjenou Victor

• Radiology Department, Campus Teaching Hospital, University of Lomé, Togo

autor

Osei Ernest

• Medical Physics Department, Grand River Regional Cancer Centre, Kitchener, Ontario, Canada
• Department of Physics and Astronomy, University of Waterloo, Waterloo, Ontario, Canada

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024).