Linear energy transfer-independent calibration of radiochromic film for carbon-ion beams. (July 2022)

• Record Type: Journal Article
• Authors: Tashiro, Mutsumi; Kawashima, Motohiro
• Is Part Of: Physics and imaging in radiation oncology. Volume 23(2022)
• Page Start: 140
• Page End: 143
• Publication Date: 2022-07
• Subjects: Carbon-ion beam therapy -- Film dosimetry in spacer -- LET-independent simple calibration -- Radiochromic film -- Gafchromic RTQA2 film; Radiotherapy -- Periodicals; Radiation dosimetry -- Periodicals; Cancer -- Imaging -- Periodicals; Oncology -- Periodicals; 615.842
• DOI: 10.1016/j.phro.2022.08.001
• Languages: English
• ISSNs: 2405-6316

Abstract

Abstract: For carbon-ion beams, radiochromic film response depends on the dose and linear energy transfer (LET). For film dosimetry, we developed an LET-independent simple calibration method for a radiochromic film for specific therapeutic carbon-ion beams. The measured film doses were calibrated with a linear function within 5% error. The penumbra positions of the films were consistent with the differences from the planned ones within ~0.4 mm. The results indicated sufficient accuracy for use as a tool for the confirmation of the penumbra position of the fields.