Evaluation of GafChromic EBT prototype B for external beam dose verification
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Evaluation of GafChromic EBT prototype B for external beam dose verification. / Todorovic, M.; Fischer, M.; Cremers, F.; Thom, E.; Schmidt, R.
in: MED PHYS, Jahrgang 33, Nr. 5, 2006, S. 1321-1328.Publikationen: SCORING: Beitrag in Fachzeitschrift/Zeitung › SCORING: Zeitschriftenaufsatz › Forschung › Begutachtung
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TY - JOUR
T1 - Evaluation of GafChromic EBT prototype B for external beam dose verification
AU - Todorovic, M.
AU - Fischer, M.
AU - Cremers, F.
AU - Thom, E.
AU - Schmidt, R.
PY - 2006
Y1 - 2006
N2 - 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 , 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 . 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.
AB - 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 , 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 . 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.
KW - Ancillary equipment
KW - Treatment strategy
KW - Record and verify systems and applications
KW - Therapeutic applications, including brachytherapy
KW - dosimetry
KW - brachytherapy
KW - mathematics computing
KW - medical computing
KW - radiochromic film dosimetry
KW - flat-bed scanner
KW - response
KW - SRT
KW - IMRT verification
KW - Dosimetry
KW - Intensity modulated radiation therapy
KW - Field size
KW - Image scanners
KW - Calibration
KW - Thin films
KW - Active layer
KW - Radiography
KW - Radiosurgery
KW - Ionization chambers
U2 - 10.1118/1.2188077
DO - 10.1118/1.2188077
M3 - SCORING: Zeitschriftenaufsatz
VL - 33
SP - 1321
EP - 1328
JO - MED PHYS
JF - MED PHYS
SN - 0094-2405
IS - 5
ER -