Extension of Radiochromic Film Dosimetry to Three Dimensions: A Feasibility Study

The feasibility of measuring dose distributions in three-dimensions using Gafchromic EBT film was studied. A stack of film was used as tomographic dosimeter. The response of film (4 x4cm2) placed between a stack of Gafchromic EBT films and slabs of polystyrene phantom was tested. Differences in film...

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Bibliographic Details
Main Authors: Adamczyk, S, Skorska, M
Format: Conference Proceeding
Language:English
Subjects:
DOSEMETERS
FEASIBILITY STUDIES
FILM DOSIMETRY
PHANTOMS
PHOTON BEAMS
POLYSTYRENE
RADIATION DOSE DISTRIBUTIONS
RADIATION PROTECTION AND DOSIMETRY
THIN FILMS
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Summary:The feasibility of measuring dose distributions in three-dimensions using Gafchromic EBT film was studied. A stack of film was used as tomographic dosimeter. The response of film (4 x4cm2) placed between a stack of Gafchromic EBT films and slabs of polystyrene phantom was tested. Differences in film response for two different photon beam qualities, 6 MV and 25 MV, were observed. Measurements with 6 MV beam quality revealed that for different field sizes and depths there were no changes in response of EBT Gafchromic film when placed between polystyrene plates or sandwiched between other films. However, in the case of 25 MV beam quality, a statistically significant over-response was found for film placed in stack. We conclude that stacked-film dosimetry is feasible at 6 MV. For 25 MV photon beam quality the stack of films showed different properties than the polystyrene slabs of the same height.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.2825819