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Dose-response of deformable radiochromic dosimeters for spot scanning proton therapy

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Intrafractional motion and deformation influence proton therapy delivery for tumours in the thorax, abdomen and pelvis. This study aimed to test the dose–response of a compressively strained three-dimensional silicone-based radiochromic dosimeter during proton beam delivery. The dosimeter was read-out in its relaxed state using optical computed tomography and calibrated for the linear energy transfer, based on Monte Carlo simulations. A three-dimensional gamma analysis showed a 99.3% pass rate for 3%/3 mm and 93.9% for 2%/2 mm, for five superimposed measurements using deformation-including Monte Carlo dose calculations as reference. We conclude that the dosimeter's dose–response is unaffected by deformations.

Original languageEnglish
JournalPhysics and Imaging in Radiation Oncology
Pages (from-to)134-137
Number of pages4
Publication statusPublished - Oct 2020

    Research areas

  • 3D dosimetry, Deformation, Monte Carlo, Proton therapy

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