SU-E-T-120: Minimum Absorbed Dose Limit for Gafchromic EBT2 Film Response after Exposure to Low-Energy Photons

2012 ◽  
Vol 39 (6Part11) ◽  
pp. 3730-3730
Author(s):  
G Massillon-JL ◽  
I Domingo-Muñoz ◽  
P Díaz-Aguirre
Keyword(s):  
Absorbed Dose ◽  
Low Energy ◽  
Dose Limit ◽  
Gafchromic Ebt2 Film ◽  
Ebt2 Film

Comparative Studies on Absorbed Dose by Geant4-based Simulation Using DICOM File and Gafchromic EBT2 Film

2013 ◽  
Vol 24 (1) ◽  
pp. 48
Author(s):  
Eun Hui Mo ◽  
Sang Ho Lee ◽  
Sung Hwan Ahn ◽  
Chong Yeal Kim
Keyword(s):  
Comparative Studies ◽  
Absorbed Dose ◽  
Dicom File ◽  
Gafchromic Ebt2 Film ◽  
Ebt2 Film

Energy dependence and dose response of Gafchromic EBT2 film over a wide range of photon, electron, and proton beam energies

2010 ◽  
Vol 37 (5) ◽  
pp. 1942-1947 ◽  
Author(s):  
Bijan Arjomandy ◽  
Ramesh Tailor ◽  
Aman Anand ◽  
Narayan Sahoo ◽  
Michael Gillin ◽  
...  
Keyword(s):  
Proton Beam ◽  
Energy Dependence ◽  
Dose Response ◽  
Wide Range ◽  
Gafchromic Ebt2 Film ◽  
Ebt2 Film

High dose per fraction dosimetry of small fields with Gafchromic EBT2 film

2011 ◽  
Vol 38 (7) ◽  
pp. 4081-4085 ◽  
Author(s):  
Nicholas Hardcastle ◽  
Amar Basavatia ◽  
Adam Bayliss ◽  
Wolfgang A. Tomé
Keyword(s):  
High Dose ◽  
Small Fields ◽  
Gafchromic Ebt2 Film ◽  
Ebt2 Film ◽  
Dose Per Fraction

X-RAY COLLIMATOR DESIGN USING MONTE CARLO SIMULATIONS

2013 ◽  
Vol 25 (06) ◽  
pp. 1350054
Author(s):  
Eun Young Han ◽  
Richard Clarkson ◽  
Sunil Sharma ◽  
Peter M. Corry ◽  
Eduardo G. Moros ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Small Animal ◽  
Low Energy ◽  
Aperture Size ◽  
Beam Size ◽  
Dose Distributions ◽  
X Ray ◽  
Collimation System ◽  
Acceptable Agreement ◽  
Ebt2 Film

The purpose of this study was to apply Monte Carlo (MC) based simulations to design a new collimation system to achieve a larger beam size (2 ± 0.1 cm) and tight penumbra (< 1 mm) with a kV X-ray small animal irradiator. The BEAMnrc and DOSXYZnrc MC-based programs were adapted to simulate the system. First the aperture of the primary collimator was expanded until the desired size of the beam was obtained. Subsequently, the beam was trimmed by reducing the aperture size of the secondary collimator in order to eliminate low energy scattered photons and sharpen the penumbra. Finally, the new collimator was constructed and the resultant dose distributions were evaluated with EBT2 film measurements. From the MC computed dose profiles, a 2.1 cm FWHM (1.9 cm width at 95% of the dose) and a sharp penumbra (< 1.0 mm) at 1.0 cm depth in water were obtained. Dose distribution comparisons between the EBT2 film measurements and the MC calculations showed acceptable agreement. MC-based calculation is an effective tool to expedite the creation of new collimator designs and avoid costly machining.

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