Abstract
UV-A irradiation of Gafchromic XR-RV3 and XR-SP2 are considered to be a substitute for X-ray irradiation in the double irradiation of Gafchromic XR-RV3 and XR-SP2. It makes it possible to compensate for heterogeneity errors in the active layers of Gafchromic XR-RV3 and XR-SP2. UV-A with a wavelength of 395-nm was irradiated to Gafchromic XR-RV3 and XR-SP2, and irradiation time and color density change were investigated. At first, Gafchromic XR-RV3 and XR-SP2 were pre-irradiated for 2 and 4 hours, respectively, by UV-A with a wavelength of 365-nm, with UV-A fluorescent lamp as the radiation source, located at a distance of 72 cm. Secondly, a UV-A light emitting diode (LED) capable of generating 395-nm UV-A was used. The irradiation times of UV-A for Gafchromic XR-RV3 and XR-SP2 were from 5 to 120 minutes and from 30 to 300 minutes at a distance of 5.0 cm, respectively. From these results, appropriate irradiation time was considered. A 0.5 inchs diameter region of interest was set for each irradiation area, and a histogram of pixel values was obtained. The selected condition was two items “There is not 0 in a mode”, “A 1/10 level intersects both sleeves of graph”.
When Gafchromic XR-RV3 and XR-SP2 were irradiated with ultraviolet rays of wavelength 395 nm as an X-ray substitute for double irradiation technology, it was proved that 60 minutes (5511.00 mJ/cm2) and 270 minutes (24799.50 mJ/ cm2) were sufficient for irradiation time respectively. And both distance was 5cm.
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References
1. Gotanda R, Kastuda T, Gotanda T, et al. (2007) Computed tomography phamtom for radiochromic film dosimetry. Australas Phys. Eng.Sci.Med. 30(3), pp 194-199
2. Lewis F. David. (2014) A Guide to Radiochromic Film Dosimetry with EBT2 and EBT3. Advanced Mate. Group, Spain
3. Kastuda T, Gotanda R, Gotanda T, et al. (2009) Reducing Non-uniformity Error of Radiochromic Film in the Diagnostic Range UV Exposure, IFMBE Proc. 25(3), pp 227-230
4. Kastuda T, Gotanda R, Gotanda T, et al. (2016) Ultraviolet exposure of Gafchromic XR-RV3 and XR-SP2 films. J Appl Clin Med Phys. 16, pp 427-434
5. de Gruiji FR (1999) Skin cancer and solar uv radiation. Eur J Cancer. 35, pp 2003-2009
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Kuwano, T. et al. (2018). UV Intensity of Pre-irradiation in Gafchromic XR-RV3 and XR-SP2. In: Eskola, H., Väisänen, O., Viik, J., Hyttinen, J. (eds) EMBEC & NBC 2017. EMBEC NBC 2017 2017. IFMBE Proceedings, vol 65. Springer, Singapore. https://doi.org/10.1007/978-981-10-5122-7_14
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DOI: https://doi.org/10.1007/978-981-10-5122-7_14
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