Open AccessDosimetric characterization and use of GAFCHROMIC EBT3 film for IMRT dose verification
Author(s) -
Borca Valeria Casanova,
Pasquino Massimo,
Russo Giuliana,
Grosso Pierangelo,
Cante Domenico,
Sciacero Piera,
Girelli Giuseppe,
Porta Maria Rosa La,
Tofani Santi
Publication year - 2013
Publication title -
journal of applied clinical medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.83
H-Index - 48
ISSN - 1526-9914
DOI - 10.1120/jacmp.v14i2.4111
Subject(s) - materials science , active layer , irradiation , orientation (vector space) , scanner , layer (electronics) , characterization (materials science) , optics , composite material , physics , nuclear physics , nanotechnology , mathematics , geometry , thin film transistor
Radiochromic film has become an important tool to verify dose distributions in highly conformal radiation therapy such as IMRT. Recently, a new generation of these films, EBT3, has become available. EBT3 has the same composition and thickness of the sensitive layer of the previous EBT2 films, but its symmetric layer configuration allows the user to eliminate side orientation dependence, which is reported for EBT2 films. The most important EBT3 characteristics have been investigated, such as response at high‐dose levels, sensitivity to scanner orientation and postirradiation coloration, energy and dose rate dependence, and orientation dependence with respect to film side. Additionally, different IMRT fields were measured with both EBT3 and EBT2 films and evaluated using gamma index analysis. The results obtained show that most of the characteristics of EBT3 film are similar to the EBT2 film, but the orientation dependence with respect to film side is completely eliminated in EBT3 films. The study confirms that EBT3 film can be used for clinical practice in the same way as the previous EBT2 film. PACS number: 87.56.Fc