Intensities of incident and transmitted ultraviolet-a rays through gafchromic films
| العنوان: | Intensities of incident and transmitted ultraviolet-a rays through gafchromic films |
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| المؤلفون: | Nobuyoshi Tanki, Rumi Gotanda, Takuya Akagawa, Atsushi Noguchi, Kouichi Yabunaka, Tatsuhiro Gotanda, Toshizo Katsuda, Tadao Kuwano |
| المصدر: | Journal of Medical Physics Journal of Medical Physics, Vol 42, Iss 2, Pp 86-89 (2017) |
| بيانات النشر: | Medknow, 2017. |
| سنة النشر: | 2017 |
| مصطلحات موضوعية: | lcsh:Medical physics. Medical radiology. Nuclear medicine, Materials science, lcsh:R895-920, Biophysics, medicine.disease_cause, 030218 nuclear medicine & medical imaging, 03 medical and health sciences, 0302 clinical medicine, Optics, ultraviolet, Technical Note, Gafchromic film, medicine, Dosimetry, Radiology, Nuclear Medicine and imaging, Irradiation, Transmission intensity, Diode, business.industry, nonuniformity error, Ultraviolet a, transmission intensity, 030220 oncology & carcinogenesis, business, Diagnostic radiology, Ultraviolet |
| الوصف: | Gafchromic films have been applied to X-ray dosimetry in diagnostic radiology. To correct nonuniformity errors in Gafchromic films, X-rays in the double-exposure technique can be replaced with ultraviolet (UV)-A rays. Intensities of the incident and transmitted UV-A rays were measured. However, it is unclear whether the chemical color change of Gafchromic films affects the UV-A transmission intensity. Gafchromic EBT3 films were suitable to be used in this study because non-UV protection layers are present on both sides of the film. The film is placed between UV-A ray light-emitting diodes and a probe of a UV meter. Gafchromic EBT3 films were irradiated by UV-A rays for up to 60 min. Data for analysis were obtained in the subsequent 60 min. Images from before and after UV-A irradiation were subtracted. When using 375 nm UV-A, the mean ± standard deviation (SD) of the pixel values in the subtracted image was remarkably high (11,194.15 ± 586.63). However, the UV-A transmissivity remained constant throughout the 60 min irradiation period. The mean ± SD UV-A transmission intensity was 184.48 ± 0.50 μm/cm2. Our findings demonstrate that color density changes in Gafchromic EBT3 films do not affect their UV-A transmission. Therefore, Gafchromic films were irradiated by UV-A rays as a preexposure. |
| تدمد: | 0971-6203 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c0926d509df02eb88d897abe41ae1e0bTest https://doi.org/10.4103/jmp.jmp_136_16Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....c0926d509df02eb88d897abe41ae1e0b |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 09716203 |
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