Polimer Gafchromic EBT3 Films in Clinical Dosimetry

Abstract

The results of the calibration of the Gafchromic EBT3 polymer film for photon and electron beams with different energies are presented. The results of these studies show that the use of film dosimetry for electron and photon beams in the dose range 0.2 - 40 Gy is possible. The resulting calibration curves are the same for electrons with different energies (2 MeV, 10 MeV), but there exists a difference for photons with the energy of 10 MV and 70 kV.

3D-printed surface applicators for brachytherapy: a phantom study

“…However, there is a significant difference for photons with 70 kV and 10 MV energies. The obtained calibrations qualitatively agree with manufacturer's specifications, suggesting that EBT3 films can be used to measure doses within a range of 0.2-40 Gy [18]. On the other hand, Massillon et al [19] showed that EBT3 film is energy-independent at doses above 100 cGy and energies greater than 100 keV photons, making it useful for 192 Ir source, which average photon energy is 380 keV.…”

“…The doses were measured with a 3D-printed applicator that closely followed the doses calculated with a commercial applicator. The results of gamma function tests using the objective test criteria of 3%/3 mm were higher than 94% [18].…”

“…Therefore, calibration was performed before starting the assessment of the deposited doses using the designed applicators. In an experiment conducted by Sukhikh [18], the characteristics of one batch of GafChromic EBT3 polymer film for electron beams of 10 MeV and 2 MeV, and photon beams of 10 MV and 70 kV were investigated. The obtained relationships showed the same film response in terms of uncertainty for electrons with 2 MeV and 10 MeV energies.…”

“…On the other hand, Massillon et al [19] showed that EBT3 film is energy-independent at doses above 100 cGy and energies greater than 100 keV photons, making it useful for 192 Ir source, which average photon energy is 380 keV. However, in Sukhikh et al study [18], dose deposition was conducted using a linear accelerator. It facilitates calibration due to trouble-free positioning of the film at any distance from radiation source, and obtaining a uniform dose distribution in the entire fragment subjected to the deposition.…”

Dosimetric assessment of the impact of low-cost materials used in stereolithography in high-dose-rate brachytherapy

“…In an experiment conducted by Sukhikh et al . [ 13 ], the characteristics of one batch of Gafchromic EBT3 polymer film for 10 MeV and 2 MeV electron beams, and 10 MV and 70 kV photon beams were investigated. The obtained relationships showed that the film response was the same in terms of uncertainty for electrons with energies of 2 MeV and 10 MeV, but there was a significant difference for photons with energies of 70 kV and 10 MV.…”