Comparison between Al2O3:C pellets and DIODEs for TSEB in vivo dosimetry using an anthropomorphic phantom

Autor(es)

Almeida, S. B. ^[1] ; Villani, D. ^[1] ; Sakuraba, R. K. ^[2] ; Rezende, A. C. P. ^[2] ; Campos, L. L. ^[1]

Afiliação do(s) autor(es)

^[1] CNEN, IPEN, Radiat Metrol Ctr, Ave Prof Lineu Prestes, 2242 Cidade Univ, Sao Paulo, SP - Brazil

^[2] Hosp Israelita Albert Einstein, Dept Radiat Therapy, Ave Albert Einstein 665, Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Radiation Physics and Chemistry; v. 167, FEB 2020.
• Citações Web of Science: 0

Resumo

The Total Skin Electron Beam (TSEB) therapy is a technique that aims to provide skin surface homogeneous absorbed dose in order to treat cutaneous T-cell lymphomas, both for curative and palliative purposes with electron beams penetrating a few millimeters into the skin, reaching the affected parts without affecting internal organs. In vivo dosimetry has become an important role for the treatment of total skin irradiation within a rigorous quality assurance. The luminescent dosimeters, such as TLDs and OSLDs, have proven to be very useful for the verification of the dose distribution and prescribed for the patient as the dose may differ from place to place due to patient body geometry, overlapping of structures and asymmetries of the radiation field. Other routine in vivo dosimetry tool is the DIODEs and they as well help validating radiation therapy dosimetry. Al2O3:C OSL pellets manufactured and marketed by REXON Components and TLD Systems have already been characterized for TSEB applications. The aim of this work is to compare the performance of Al2O3:C OSL pellets from REXON to in vivo TSEB dosimetry with silicon DIODEs QEDTM detectors from Sun Nuclear (EUA) using an anthropometric phantom. Dosimeters and DIODEs were previously characterized for 6 MeV HDTSe- electron beams and then placed over an Anderson Rando (R) anthropomorphic phantom, evaluating the body dose distribution. The reference point of measurement was the umbiculous as recommended by formalism. The results showed that the Al2O3:C OSL pellets presented acceptable results, but some greater variation of the response in relation to silicon DIODEs were found due to its considerable rotational dependency. (AU)

• Processo FAPESP: 10/16437-0 - Caracterização e aplicações de materiais dosimétricos utilizando a luminescência opticamente estimulada e técnicas complementares
• Beneficiário: Linda Viola Ehlin Caldas
• Modalidade de apoio: Auxílio à Pesquisa - Temático