Evaluation of the Gafchromic® EBT2 film for the dosimetry of radiosurgical beams

Lárraga‐Gutiérrez, José M.; García-Hernández, Diana; García‐Garduño, Olivia Amanda; Cruz, O. O. Galván de la; Ballesteros-Zebadúa, Paola; Esparza-Moreno, Karina P.

doi:10.1118/1.4752211

Cited by 20 publications

(20 citation statements)

References 29 publications

(36 reference statements)

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“…The microLion has been discontinued by manufacturer and is not available commercially. For the Gafchromic EBT2/3 films, proper precautions and experience is needed for achieve comparable data (59)(60)(61). User should also evaluate the criterion for correction-less dosimetry if there is any doubt as discussed by Kamio and Bouchard (57).…”

Section: Discussionmentioning

confidence: 99%

Small field dosimetry: What have we learnt?

Das

Morales

Francescon

2016

AIP Conference Proceedings

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Section: Discussionmentioning

confidence: 99%

Small field dosimetry: What have we learnt?

Das

Morales

Francescon

2016

AIP Conference Proceedings

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“…A range of detectors broadly categorized into active (ionization chambers, solid state detectors, and plastic scintillator) and passive (TLD microcubes, gafchromic film, alanine pallets, radio photoluminescent dosimeter, and gel dosimeter) detectors have been investigated by numerous authors for small field measurements. [9101112131415161718192021222324]…”

Section: Introductionmentioning

confidence: 99%

Investigating the electronic portal imaging device for small radiation field measurements

et al. 2017

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Purpose:With the advent of state-of-the-art treatment technologies, the use of small fields has increased, and dosimetry in small fields is highly challenging. In this study, the potential use of Varian electronic portal imaging device (EPID) for small field measurements was explored for 6 and 15 MV photon beams.Materials and Methods:The output factors and profiles were measured for a range of jaw-collimated square field sizes starting from 0.8 cm × 0.8 cm to 10 cm × 10 cm using EPID. For evaluation purpose, reference data were acquired using Exradin A16 microionization chamber (0.007 cc) for output factors and stereotactic field diode for profile measurements in a radiation field analyzer.Results:The output factors of EPID were in agreement with the reference data for field sizes down to 2 cm × 2 cm and for 2 cm × 2 cm; the difference in output factors was +2.06% for 6 MV and +1.56% for 15 MV. For the lowest field size studied (0.8 cm × 0.8 cm), the differences were maximum; +16% for 6 MV and +23% for 15 MV photon beam. EPID profiles of both energies were closely matching with reference profiles for field sizes down to 2 cm × 2 cm; however, penumbra and measured field size of EPID profiles were slightly lower compared to its counterpart.Conclusions:EPID is a viable option for profile and output factor measurements for field sizes down to 2 cm × 2 cm in the absence of appropriate small field dosimeters.

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“…[123456789] However, the process is cumbersome when an absorbed dose is measured using radiochromic film as a film dosimeter, and it is necessary for the film density to be converted into an absorbed dose. For general measurement, time-scale methods requiring several dozen irradiations were performed.…”

Section: Introductionmentioning

confidence: 99%

Simplified method for creating a density-absorbed dose calibration curve for the low dose range from Gafchromic EBT3 film

et al. 2016

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Radiochromic film dosimeters have a disadvantage in comparison with an ionization chamber in that the dosimetry process is time-consuming for creating a density-absorbed dose calibration curve. The purpose of this study was the development of a simplified method of creating a density-absorbed dose calibration curve from radiochromic film within a short time. This simplified method was performed using Gafchromic EBT3 film with a low energy dependence and step-shaped Al filter. The simplified method was compared with the standard method. The density-absorbed dose calibration curves created using the simplified and standard methods exhibited approximately similar straight lines, and the gradients of the density-absorbed dose calibration curves were −32.336 and −33.746, respectively. The simplified method can obtain calibration curves within a much shorter time compared to the standard method. It is considered that the simplified method for EBT3 film offers a more time-efficient means of determining the density-absorbed dose calibration curve within a low absorbed dose range such as the diagnostic range.

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Evaluation of the Gafchromic® EBT2 film for the dosimetry of radiosurgical beams

Cited by 20 publications

References 29 publications

Small field dosimetry: What have we learnt?

Small field dosimetry: What have we learnt?

Investigating the electronic portal imaging device for small radiation field measurements

Simplified method for creating a density-absorbed dose calibration curve for the low dose range from Gafchromic EBT3 film

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