Evaluation of GafChromic EBT prototype B for external beam dose verification
- Department of Radiotherapy and Radio-Oncology, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg (Germany)
The capability of the new GafChromic EBT prototype B for external beam dose verification is investigated in this paper. First the general characteristics of this film (dose response, postirradiation coloration, influence of calibration field size) were derived using a flat-bed scanner. In the dose range from 0.1 to 8 Gy, the sensitivity of the EBT prototype B film is ten times higher than the response of the GafChromic HS, which so far was the GafChromic film with the highest sensitivity. Compared with the Kodak EDR2 film, the response of the EBT is higher by a factor of 3 in the dose range from 0.1 to 8 Gy. The GafChromic EBT almost does not show a temporal growth of the optical density and there is no influence of the chosen calibration field size on the dose response curve obtained from this data. A MatLab program was written to evaluate the two-dimensional dose distributions from treatment planning systems and GafChromic EBT film measurements. Verification of external beam therapy (SRT, IMRT) using the above-mentioned approach resulted in very small differences between the planned and the applied dose. The GafChromic EBT prototype B together with the flat-bed scanner and MatLab is a successful approach for making the advantages of the GafChromic films applicable for verification of external beam therapy.
- OSTI ID:
- 20775203
- Journal Information:
- Medical Physics, Journal Name: Medical Physics Journal Issue: 5 Vol. 33; ISSN 0094-2405; ISSN MPHYA6
- Country of Publication:
- United States
- Language:
- English
Similar Records
Comparison of Kodak EDR2 and Gafchromic EBT film for intensity-modulated radiation therapy dose distribution verification
Measurement of relative output factors for the 8 and 4 mm collimators of Leksell Gamma Knife Perfexion by film dosimetry
SU-E-T-498: Initial Characterization of the New EBT XD Gafchromic Film
Journal Article
·
Sat Dec 31 23:00:00 EST 2005
· Medical Dosimetry
·
OSTI ID:20858083
Measurement of relative output factors for the 8 and 4 mm collimators of Leksell Gamma Knife Perfexion by film dosimetry
Journal Article
·
Fri May 15 00:00:00 EDT 2009
· Medical Physics
·
OSTI ID:22100510
SU-E-T-498: Initial Characterization of the New EBT XD Gafchromic Film
Journal Article
·
Mon Jun 15 00:00:00 EDT 2015
· Medical Physics
·
OSTI ID:22548536