Characterization of Gafchromic EBT3 films for ultraviolet radiation dosimetry

Aydarous, Abdulkadir; Al-Omary, Enaam Ali; Ghazaly, M. El

doi:10.1080/10420150.2013.848446

Cited by 20 publications

(21 citation statements)

References 19 publications

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“…The range usable for UV dosimetry was also established. Although Aydarous et al 13 claimed that the response of the EBT3 film to UVA and UVB radiation tended to saturate at an exposure of about 60 J cm −2 , this was not explicitly shown in their calibration curves.…”

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confidence: 94%

Note: Calibration of EBT3 radiochromic film for measuring solar ultraviolet radiation

Chun

2014

Review of Scientific Instruments

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Solar (UVA + UVB) exposure was assessed using the Gafchromic EBT3 film. The coloration change was represented by the net reflective optical density (Net ROD). Through calibrations against a UV-tube lamp, operational relationships were obtained between Net ROD and the (UVA + UVB) exposures (in J cm(-2) or J m(-2)). The useful range was from ∼0.2 to ∼30 J cm(-2). The uniformity of UV irradiation was crucial for an accurate calibration. For solar exposures ranging from 2 to 11 J cm(-2), the predicted Net ROD agreed with the recorded values within 9%, while the predicted exposures agreed with the recorded values within 15%.

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confidence: 94%

Note: Calibration of EBT3 radiochromic film for measuring solar ultraviolet radiation

Chun

2014

Review of Scientific Instruments

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“…For non-UV-emitting light sources, less than 1% of this nonradiationinduced response was found (0.072 cGy/min). Though UV protection has been added to current film structures 25 and the effect of a single EBT scan on a white-light scanner is likely minimal, 11,26 decrease in blue-channel absorbance with consecutive scans has been reported. 27 The recent singlescan dosimetry protocol 28 suggests that calibration films be scanned with each measurement film, naturally requiring multiple scans of calibration films.…”

Section: Introductionmentioning

confidence: 99%

A prototype, glassless densitometer traceable to primary optical standards for quantitative radiochromic film dosimetry

et al. 2015

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“…The blue colored polymer is formed when the active component in the film is exposed to radiation [7]. The color changes of EBT3 films have been proven to be highly correlated with the absorbed UV exposure by the films [8][9][10][11][12][13][14][15][16][17]. For the color analysis of the film through the visible absorbance spectroscopy technique, researchers found that the wavelength in the red region of the spectrum has the highest absorption [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

“…The absorption spectrum for the EBT3 film has two distinctive peaks, at 633 nm and 582 nm. However, the absorption peak at 633 nm provides a higher sensitivity than the peak at 582 nm [17]. Choosing a light source with a wavelength at the maximum absorption will provide the highest sensitivity for the EBT3 film measurement [20].…”

Section: Introductionmentioning

confidence: 99%

“…Until today, the flatbed scanner [9,10,18,[23][24][25] and visible spectroscopy [7,8,17,21] are considered to be the most acceptable optical tools in analyzing the color changes of the radiochromic film and red channel/wavelength to be the most sensitive in the application. Hence, to utilize only a single red wavelength from a spectrometer or a single red channel from a scanner is not a cost-effective measure.…”

Section: Introductionmentioning

confidence: 99%

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Spectroscopy and Light Emitting Diodes Based System in Characterizing External Beam Therapy 3 Films for Solar Ultraviolet Measurement

Shah

Omar

2019

Photonic Sens

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Gafchromic external beam therapy 3 (EBT3) film has widely been used in medical field applications. Principally, the EBT3 film's color gradually changes from light green to darker color under incremental exposures by ionizing or even non-ionizing ultraviolet (UV) radiation. Peak absorbance of the EBT3 film can be used to predict absorbed doses by the film. However, until today, related researches still rely on spectrometers for color analysis of EBT3 films. Hence, this paper presents a comparative analysis between results produced by the spectrometer and a much simpler light-emitting diode-photodiode based system in profiling the color changes of EBT3 films after exposure by solar UV radiation. This work has been conducted on a set of 50 EBT3 samples with incremental solar UV exposure (doses). The wavelength in the red region has the best sensitivity in profiling the color changes of EBT3 films for low solar UV exposure measurement. This study foresees the ability of blue wavelength to profile films with a large range of solar UV exposure. The LED (light emitting diode)-based optical system has produced comparable measurement accuracies to the spectrometer and thus, with a potential for replacing the need for a multipurpose spectroscopy system for simple measurement of light attenuation.

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Characterization of Gafchromic EBT3 films for ultraviolet radiation dosimetry

Cited by 20 publications

References 19 publications

Note: Calibration of EBT3 radiochromic film for measuring solar ultraviolet radiation

Note: Calibration of EBT3 radiochromic film for measuring solar ultraviolet radiation

A prototype, glassless densitometer traceable to primary optical standards for quantitative radiochromic film dosimetry

Spectroscopy and Light Emitting Diodes Based System in Characterizing External Beam Therapy 3 Films for Solar Ultraviolet Measurement

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