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Updated: Jun 14, 2026
Irradiator Commissioning and Dosimetry for Assessment of LQ α and β Parameters, Radiation Dosing Schema, and in vivo Dose Deposition
Published on: March 11, 2021
Small photon beam measurements using radiochromic film and Monte Carlo simulations in a water phantom
Olivia A García-Garduño1, José M Lárraga-Gutiérrez, Mercedes Rodríguez-Villafuerte
1Laboratorio de Física Médica, Instituto Nacional de Neurología y Neurocirugía, Tlalpan, Mexico City, Mexico.
Abstract:
This work reports the use of both GafChromic EBT film immersed in a water phantom and Monte Carlo (MC) simulations for small photon beam stereotactic radiosurgery dosimetry. Circularly collimated photon beams with diameters in the 4-20 mm range of a dedicated 6 MV linear accelerator (Novalis, BrainLAB, Germany) were used to perform off-axis ratios, tissue maximum ratios and total scatter factors measurements, and MC simulations. GafChromic EBT film data show an excellent agreement with MC results (<2.7%) for all measured quantities.
