دورية أكاديمية
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: | Toshizo Katsuda, Rumi Gotanda, Tatsuhiro Gotanda, Takuya Akagawa, Nobuyoshi Tanki, Tadao Kuwano, Atsushi Noguchi, Kouichi Yabunaka |
| المصدر: | Journal of Medical Physics, Vol 42, Iss 2, Pp 86-89 (2017) |
| بيانات النشر: | Wolters Kluwer Medknow Publications, 2017. |
| سنة النشر: | 2017 |
| المجموعة: | LCC:Medical physics. Medical radiology. Nuclear medicine |
| مصطلحات موضوعية: | Diagnostic radiology, Gafchromic film, nonuniformity error, transmission intensity, ultraviolet, Medical physics. Medical radiology. Nuclear medicine, R895-920 |
| 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. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 0971-6203 1998-3913 |
| العلاقة: | http://www.jmp.org.in/article.asp?issn=0971-6203;year=2017;volume=42;issue=2;spage=86;epage=89;aulast=KatsudaTest; https://doaj.org/toc/0971-6203Test; https://doaj.org/toc/1998-3913Test |
| DOI: | 10.4103/jmp.JMP_136_16 |
| الوصول الحر: | https://doaj.org/article/89011182072549c69378ec0736d4e778Test |
| رقم الانضمام: | edsdoj.89011182072549c69378ec0736d4e778 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 09716203 19983913 |
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| DOI: | 10.4103/jmp.JMP_136_16 |