Absolute dosimetry through radiochromic film in gamma irradiation system using a spectrophotometer UV-VIS
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Abstract
The propose of this work was the Gafchromic HD-V2 film calibration, though adapting film calibration procedures applied in low dose. The films were irradiated in 11 dose values within of the range from 0 to 106,28 Gy in a gamma irradiation system, and using a spectrophotometer for the optical density measure. The absorbance spectrum were obtained for several dose, and the maximum absorbance peak was located in the wavelength of 677 nm. This wavelength was used for make the measurements of the optical density (OD), and these results were used for make the dose versus net optical density (ODn) graph. The calibration curve of the films and uncertainty in the dose were obtained, with values under 4% in dose between 10 to 20 Gy, and uncertainties under 3% for dose up from 20 Gy until complete the range of the curve. The calibration of the radiochromic film-spectrophotometer system was obtained for dose range and gamma irradiation system employed.
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References
[2] S. Devic et al. “Absorption spectroscopy of EBT model GafchromicTM film”, Med. Phys., vol. 34, n° 1, pp: 112-118, 2007. DOI: 10.1118/1.2400615
[3] A. Aydarous et al. “The effects of electrons and photons irradiation on the optical and thermophysical properties of Gafchromic HD-V2 films”, Results in Physics, vol. 6, pp: 952-956, 2016. http://dx.doi.org/10.1016/j.rinp.2016.11.025
[4] S. N. Chen et al. “Absolute dosimetric characterization of Gafchromic EBT3 and HDv2 films using commercial flat-bed scanners and evaluation of the scanner response function variability”, Rev. Sci. Instrum., vol. 87, pp: 073301-1 a 073301-6, 2016. http://dx.doi.org/10.1063/1.4954921
[5] Y. Feng et al. “Spectral calibration of EBT3 and HD-V2 radiochromic film response at high dose using 20 MeV proton beams”, Rev. Sci. Instrum., vol. 89, pp: 043511-1 a 043511-12, 2018. https://doi.org/10.1063/1.4996022
[6] J. E. Matney et al. “Evaluation of a commercial flatbed document scanner and radiographic film scanner for radiochromic EBT film dosimetry”, Journal of Applied Clinical Medical Physics, vol. 11, n° 2, pp: 198-208, 2010.
[7] S. Devic et al. “Dosimetric properties of improved Gafchromic films for seven different digitizers”, Med. Phys, vol. 31, n° 9, pp: 2392-2401, 2004. DOI: 10.1118/1.1776691
[8] H. Alnawaf et al. “Comparison of Epson scanner quality for radiochromic film evaluation”, Journal of Applied Clinical Medical Physics, vol. 13, n° 5, pp: 314-321, 2012.
[9] G. R. Gluckman and L. E. Reinstein. “Comparison of three high-resolution digitizers for radiochromic film dosimetry”, Med. Phys., vol. 29, n° 8, pp: 1839-1846, 2002. http://dx.doi.org/10.1118/1.1485056
[10] S. Devic et al. “Reference radiochromic film dosimetry: Review of technical aspects”, Physica Medica, vol. 32, pp: 541-556, 2016. http://dx.doi.org/10.1016/j.ejmp.2016.02.008
[11] A. Niroomand-Rad et al. “Radiochromic film dosimetry: Recommendation of AAPM Radiation Therapy Committee Task Group 55”, Med. Phys., vol. 25, n° 11, pp: 2093-2115, 1998. http://dx.doi.org/10.1118/1.598407
[12] H. Alnawaf et al. “Absorption spectra response of XRQA radiochromic film to x-ray radiation”, Radiation Measurements, vol. 45, pp: 129-132, 2010.
[13] M. B. Callens et al. “Modeling the dose dependence of the vis-absorption spectrum of EBT3 GafchromicTM films”, Med. Phys., vol. 44, n° 6, pp: 2532-2543, 2017. https://doi.org/10.1002/mp.12246
[14] E. Y. Marroquín et al. “Análisis de los espectros de absorción de las películas EBT2 y EBT3”, Revista Mexicana de Ingeniería Biomédica, vol. 38, n° 1, pp: 363-371, 2017. dx.doi.org/10.17488/RMIB.38.1.32
[15] S. Devic et al. “Precise radiochromic film dosimetry using a flat-bed document scanner”, Med. Phys., vol. 32, n° 7, pp: 2245-2253, 2005. DOI: 10.1118/1.1929253
[16] M. J. Butson et al. “Polarization effects on a high-sensitivity radiochromic film”, Phys. Med. Biol., vol. 48, pp: N207-N211, 2003. stacks.iop.org/PMB/48/N207
[17] H. Alnawaf et al. “Scanning orientation and polarization effects for XRQA radiochromic film”, Physica Medica, vol. 26, pp: 216-219, 2010. doi:10.1016/j.ejmp.2010.01.003
[18] JCGM. “Evaluación de datos de medición-Guía para la expresión de la incertidumbre de medida”, 3ª edición en español, 2009.
[19] V. Casanova et al. “Dosimetric characterization and use of Gafchromic EBT3 film for IMRT dose verification”, Journal of Applied Clinical Medical Physics, vol. 14, n° 2, pp: 158-171, 2013.
[20] J. Lárraga-Gutiérrez et al. “Evaluation of a LED-based flatbed document scanner for radiochromic film dosimetry in transmission mode”, Physica Medica, vol. 47, pp: 86-91, 2018. https://doi.org/10.1016/j.ejmp.2018.02.010
[21] E. Y. Marroquín et al. “Evaluation of the uncertainty in an EBT3 film dosimetry system utilizing net optical density”, Journal of Applied Clinical Medical Physics, vol. 17, n° 5, pp: 466-481, 2016.