Small photon beam measurements using radiochromic film and Monte Carlo simulations in a water phantom.
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.
García-Garduño
Olivia A
OA
Laboratorio de Física Médica, Instituto Nacional de Neurología y Neurocirugía, Tlalpan, Mexico City, Mexico.
Lárraga-Gutiérrez
José M
JM
Rodríguez-Villafuerte
Mercedes
M
Martínez-Dávalos
Arnulfo
A
Celis
Miguel A
MA
D005373:Film Dosimetry / Q000379:methods; D009010:Monte Carlo Method; D019047:Phantoms, Imaging; D017785:Photons; D011874:Radiometry / Q000379:methods*; D014867:Water
D014867:Water