Uncertainties in the measurement of relative doses in radiotherapy

• Autorzy: Buliński Krzysztof , Kuszewski Tomasz , Wnuk Katarzyna , Braziewicz Janusz , Ślosarek Krzysztof

Identyfikatory

DOI

10.2478/pjmpe-2021-0001

• Języki publikacji: EN

Abstrakty

EN

Both the measurement of the dose and the measurement of its distribution, like any other measurements, are subject to measurement uncertainties. These uncertainties affect all dose calculations and dose distributions in a patient’s body during treatment planning in radiotherapy. Measurement uncertainty is not a medical physicist's error, but an inevitable element of their work. Planning the dose distribution in a patient’s body, we often try to reduce it in the volume of critical organs (OaR - Organ at Risk) or increase the minimum dose in the PTV region by a few percent. It is believed that the measurement uncertainty should be taken into account in these calculations at the stage of treatment planning. The paper presents the method of calculating the measurement uncertainty for different physical quantities in radiotherapy as percentage depth dose, profile function and output factor, due to the fact that these quantities have a particular impact on the calculated dose distributions in a patient’s body. The uncertainties that must be taken into account in planning treatment the planned dose per fraction and real in PTV, maybe different up to 4%.

Słowa kluczowe

EN

measurement uncertainty; standard dose; depth dose; beam profiles; output factor

• Wydawca: Polskie Towarzystwo Fizyki Medycznej ; De Gruyter
• Czasopismo: Polish Journal of Medical Physics and Engineering
• Rocznik: 2021
• Tom: Vol. 27, Iss. 1
• Strony: 1--9
• Opis fizyczny: Bibliogr. 11 poz., rys., tab.

Twórcy

autor

Buliński Krzysztof

• Institute of Physics, Jan Kochanowski University, Kielce, Poland
• Holycross Cancer Center, Kielce, Poland

autor

Kuszewski Tomasz

• Institute of Physics, Jan Kochanowski University, Kielce, Poland
• Holycross Cancer Center, Kielce, Poland

autor

Wnuk Katarzyna

• Institute of Physics, Jan Kochanowski University, Kielce, Poland
• Holycross Cancer Center, Kielce, Poland

autor

Braziewicz Janusz

• Institute of Physics, Jan Kochanowski University, Kielce, Poland
• Holycross Cancer Center, Kielce, Poland

autor

Ślosarek Krzysztof

• Collegium Medicum, Jan Kochanowski University, Kielce, Poland
• Maria Skłodowska – Curie, National Research Institute of Oncology, Gliwice Branch, Gliwice, Poland

Bibliografia

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• 8. Evaluation of measurement data — Guide to the expression of uncertainty in measurement. JCGM 100:2008, 2008. Available: https://www.bipm.org/en/publications/guides/gum.html
• 9. Malicki J, Ślosarek K. Planowanie leczenia, dozymetria w radioterapii, Tom 2. Via Medica, 2018.
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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).