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Updated: Apr 21, 2026

Dosimetry for Cell Irradiation using Orthovoltage 40-300 kV X-Ray Facilities
Published on: February 20, 2021
Note: Calibration of EBT3 radiochromic film for measuring solar ultraviolet radiation
1Department of Physics and Materials Science, City University of Hong Kong, Kowloon Tong, Hong Kong.
Abstract:
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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