Micro silica bead scintillators for the relative dosimetry of a stereotactic radiosurgery unit

Stepanek, Chris J.; Aylward, Jack D.; Hartley-Davies, Ronald; Winch, Lucy

Abstract

This work describes the procedure of using Micro Silica Beads (MSBs) to verify the output factors and profiles of a stereotactic radiosurgery unit. MSBs have shown acceptable dosimetric accuracy for measurement of Detector Output Ratios (DORs) and shot profiles, down to a full width at half maximum (FWHM) of 5 mm. DORs measured with MSBs were within 1.5 % of radiochromic film, and 3 % of a microdiamond detector. Measured FWHM were within 0.2 mm of planning system and radiochromic film. MSBs can be used as an effective substitute to radiochromic film for measurement of shot profiles and DORs.

• Journal Article Type: Article
• Acceptance Date: Jan 21, 2025
• Online Publication Date: Jan 25, 2025
• Publication Date: Jan 31, 2025
• Deposit Date: Jan 27, 2025
• Publicly Available Date: Jan 30, 2025
• Journal: Physics and imaging in radiation oncology
• Electronic ISSN: 2405-6316
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 33
• Article Number: 100709
• DOI: https://doi.org/10.1016/j.phro.2025.100709
• Keywords: Micro Silica Beads, Gamma Knife relative dosimetry, Shot Profiles, Detector Output Ratios
• Public URL: https://uwe-repository.worktribe.com/output/13650788