Comparison of the EBT2 calibration responses in 4MV LINAC at Water and Solid Water Materials
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| Formato: | Artículo científico |
| Lenguaje: | en |
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Sociedade Brasileira de Proteção Radiológica - SBPR
2019
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| _version_ | 1876452620345802752 |
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| author | Sabrina Donato Silva |
| author_facet | Sabrina Donato Silva |
| contents | Comparison of the EBT2 calibration responses in 4MV LINAC at Water and Solid Water Materials Sabrina Donato Silva André L. S. Castro Thais Melo Mendes Luciana B. Nogueira Tarcisio Passos Ribeiro Campos Biología dosimetry Radiochromic film calibration processes Currently, cancer has gained a larger dimension and become a global public health problem. Radiotherapy (RT) performs the treatment by RT Linacs. Such linear accelerators must undergo a strict dose quality control. Water or solid water phantoms can be used with this intuit. In recent years, radiochromic films with equivalent tissue composition have been widely used as dosimeters in the medical field. The present proposal was to analyze the two distinct dosimeter responses in water and solid water phantoms at a 4MV beam spectrum. Solid water and water phantoms and EBT2 Radiochromic films were set in two distinct calibration processes. Films were exposed to a set of absorbed doses established by distinct monitor units (MU) specified in a RT-center. Mathematical correlations between the level of red-intensity from digitized films and the absorbed dose for both methods were established. The coefficients of the polynomial function of the calibration curve were determined by the Origin software. The uncertainty of both processes was analyzed. The efficiencies of the two calibration processes were set up. The adjustment of the calibration curve provided the coefficients of the second-order equation that relates the dose absorbed with the optical density in the film. The uncertainties regarding the calibration performed in water and solid water and the dose-error accuracy were in agreement with the literature. Both water and solid water were effective in calibration and can be used in routines of quality-control measurements. The results showed that EBT2-radiochromic films are suitable to for dose-calibration in RT. 2019 artículo científico 2319-0612 https://www.redalyc.org/articulo.oa?id=722280838083 en http://www.redalyc.org/revista.oa?id=7222 Brazilian Journal of Radiation Sciences application/pdf Sociedade Brasileira de Proteção Radiológica - SBPR Brazilian Journal of Radiation Sciences (Brasil) Num.2A Vol.7 |
| format | Artículo científico |
| id | redalyc_722280838083 |
| institution | Redalyc |
| language | en |
| publishDate | 2019 |
| publisher | Sociedade Brasileira de Proteção Radiológica - SBPR |
| spellingShingle | Comparison of the EBT2 calibration responses in 4MV LINAC at Water and Solid Water Materials Sabrina Donato Silva Biología dosimetry Radiochromic film calibration processes Comparison of the EBT2 calibration responses in 4MV LINAC at Water and Solid Water Materials Sabrina Donato Silva André L. S. Castro Thais Melo Mendes Luciana B. Nogueira Tarcisio Passos Ribeiro Campos Biología dosimetry Radiochromic film calibration processes Currently, cancer has gained a larger dimension and become a global public health problem. Radiotherapy (RT) performs the treatment by RT Linacs. Such linear accelerators must undergo a strict dose quality control. Water or solid water phantoms can be used with this intuit. In recent years, radiochromic films with equivalent tissue composition have been widely used as dosimeters in the medical field. The present proposal was to analyze the two distinct dosimeter responses in water and solid water phantoms at a 4MV beam spectrum. Solid water and water phantoms and EBT2 Radiochromic films were set in two distinct calibration processes. Films were exposed to a set of absorbed doses established by distinct monitor units (MU) specified in a RT-center. Mathematical correlations between the level of red-intensity from digitized films and the absorbed dose for both methods were established. The coefficients of the polynomial function of the calibration curve were determined by the Origin software. The uncertainty of both processes was analyzed. The efficiencies of the two calibration processes were set up. The adjustment of the calibration curve provided the coefficients of the second-order equation that relates the dose absorbed with the optical density in the film. The uncertainties regarding the calibration performed in water and solid water and the dose-error accuracy were in agreement with the literature. Both water and solid water were effective in calibration and can be used in routines of quality-control measurements. The results showed that EBT2-radiochromic films are suitable to for dose-calibration in RT. 2019 artículo científico 2319-0612 https://www.redalyc.org/articulo.oa?id=722280838083 en http://www.redalyc.org/revista.oa?id=7222 Brazilian Journal of Radiation Sciences application/pdf Sociedade Brasileira de Proteção Radiológica - SBPR Brazilian Journal of Radiation Sciences (Brasil) Num.2A Vol.7 |
| title | Comparison of the EBT2 calibration responses in 4MV LINAC at Water and Solid Water Materials |
| topic | Biología dosimetry Radiochromic film calibration processes |
| url | https://www.redalyc.org/articulo.oa?id=722280838083 |