Dose assessment in high dose rate brachytherapy with cobalt-60 source for cervical cancer treatment: a phantom study

• Autorzy: Bour Bright Kwadwo , Inkoom Stephen , Tagoe Samuel Nii Adu , Amuasi John Humphrey , Sasu Evans , Hasford Francis

Identyfikatory

DOI

10.2478/pjmpe-2020-0029

• Języki publikacji: EN

Abstrakty

EN

Transition from low dose rate brachytherapy to high dose rate brachytherapy at our department necessitated the performance of dose verification test, which served as an end-to-end quality assurance procedure to verify and validate dose delivery in intracavitary brachytherapy of the cervix and the vaginal walls based on the Manchester system. An inhouse water phantom was designed and constructed from Perspex sheets to represent the cervix region of a standard adult patient. The phantom was used to verify the whole dose delivery chain such as calibration of the cobalt-60 source in use, applicator, and source localization method, the output of treatment planning with dedicated treatment planning system, and actual dose delivery process. Since the above factors would influence the final dose delivered, doses were measured with calibrated gafchromic EBT3 films at various points within the in-house phantom for a number of clinical implants that were used to treat a patient based on departmental protocol. The measured doses were compared to those of the treatment planning system. The discrepancies between measured doses and their corresponding calculated doses obtained with the treatment planning system ranged from -29.67 to 40.34% (mean of ±13.27%). These compared similarly to other studies.

Słowa kluczowe

EN

brachytherapy; dose; gafchromic EBT3 films; Manchester system; in-house water phantom

• Wydawca: Polskie Towarzystwo Fizyki Medycznej ; De Gruyter
• Czasopismo: Polish Journal of Medical Physics and Engineering
• Rocznik: 2020
• Tom: Vol. 26, Iss. 4
• Strony: 243--250
• Opis fizyczny: Bibliogr. 21 poz., rys., tab.

Twórcy

autor

Bour Bright Kwadwo

• Department of Medical Physics, Graduate School of Nuclear and Allied Sciences, University of Ghana, Accra, Ghana

autor

Inkoom Stephen

• Department of Medical Physics, Graduate School of Nuclear and Allied Sciences, University of Ghana, Accra, Ghana
• Radiation Protection Institute, Ghana Atomic Energy Commission, Accra, Ghana

autor

Tagoe Samuel Nii Adu

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

autor

Amuasi John Humphrey

• Department of Medical Physics, Graduate School of Nuclear and Allied Sciences, University of Ghana, Accra, Ghana

autor

Sasu Evans

• Department of Radiotherapy, National Centre for Radiotherapy and Nuclear Medicine, Korle-Bu Teaching Hospital, Accra, Ghana

autor

Hasford Francis

• Department of Medical Physics, Graduate School of Nuclear and Allied Sciences, University of Ghana, Accra, Ghana

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).