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, Vol. 33, No. 5, 2006, p. 1321-1328.

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@article{db52335279db488a9ac9077a4bb4d9e3,
title = "Evaluation of GafChromic EBT prototype B for external beam dose verification",
abstract = "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.",
keywords = "Ancillary equipment, Treatment strategy, Record and verify systems and applications, Therapeutic applications, including brachytherapy, dosimetry, brachytherapy, mathematics computing, medical computing, radiochromic film dosimetry, flat-bed scanner, response, SRT, IMRT verification, Dosimetry, Intensity modulated radiation therapy, Field size, Image scanners, Calibration, Thin films, Active layer, Radiography, Radiosurgery, Ionization chambers",
author = "M. Todorovic and M. Fischer and F. Cremers and E. Thom and R. Schmidt",
year = "2006",
doi = "10.1118/1.2188077",
language = "Deutsch",
volume = "33",
pages = "1321--1328",
journal = "MED PHYS",
issn = "0094-2405",
publisher = "AAPM - American Association of Physicists in Medicine",
number = "5",

}

RIS

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 -