Multi-dimensional dosimetric verification of stereotactic radiotherapy for uveal melanoma using radiochromic EBT film

Sturtewagen, Eva; Fuß, Martina; Paelinck, Leen; Wagter, Carlos De; Georg, Dietmar

doi:10.1016/j.zemedi.2007.08.001

Cited by 16 publications

(6 citation statements)

References 22 publications

(40 reference statements)

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“…This section focuses on the use of RCF in machine QA and PSQA for special procedures. For linac-based special procedures, RCFs have been used for dose confirmation and PSQA to verify the dosimetric accuracy of TPS calculations for SRS and fractionated SRT, [238][239][240][241] IMRT, 41,91,242,243 VMAT, 242,243 conformal beam delivery for SBRT 224,244,245 via IMRT 246,247 or VMAT delivery 234,[248][249][250] and with flattening filter free (FFF) beams. 234,[250][251][252][253] They have also been used to verify VMAT delivery to moving targets, 254 nonisocentric treatment delivery with CK and HT units, and for dose verification in anthropomorphic phantoms, 253,255 moving targets in lung 256 and to study intrafractional prostate motion.…”

Section: A3 Special Procedures With Photon Beamsmentioning

confidence: 99%

Report of AAPM Task Group 235 Radiochromic Film Dosimetry: An Update to TG‐55

et al. 2020

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The use of radiochromic film (RCF) dosimetry in radiation therapy is extensive due to its high level of achievable accuracy for a wide range of dose values and its suitability under a variety of measurement conditions. However, since the publication of the 1998 AAPM Task Group 55, Report No. 63 on RCF dosimetry, the chemistry, composition, and readout systems for RCFs have evolved steadily. There are several challenges in using the new RCFs, readout systems and validation of the results depending on their applications. Accurate RCF dosimetry requires understanding of RCF selection, handling and calibration methods, calibration curves, dose conversion methods, correction methodologies as well as selection, operation and quality assurance (QA) programs of the readout systems. Acquiring this level of knowledge is not straight forward, even for some experienced users. This Task Group report addresses these issues and provides a basic understanding of available RCF models, dosimetric characteristics and properties, advantages and limitations, configurations, and overall elemental compositions of the RCFs that have changed over the past 20 yr. In addition, this report provides specific guidelines for data processing and analysis schemes and correction methodologies for clinical applications in radiation therapy.

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Section: A3 Special Procedures With Photon Beamsmentioning

confidence: 99%

Report of AAPM Task Group 235 Radiochromic Film Dosimetry: An Update to TG‐55

et al. 2020

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“…Radiochromic films have found use for dosimetry of small photon fields employed in stereotactic radiotherapy: Wilcox and Daskalov [66] evaluated the EBT film model for CyberKnife (R) dosimetry, and the same authors [67] also investigated the accuracy of dose measurements and calculations within and beyond heterogeneous tissues for 6 MV photon fields smaller than 4 cm produced by a CyberKnife, while Sturtewagen et al [68] performed multi-dimensional dosimetric verification of stereotactic radiotherapy for uveal melanoma using radiochromic EBT film.…”

Section: Figurementioning

confidence: 99%

Radiochromic film dosimetry: Past, present, and future

2011

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“…Over time, radiochromic films have been employed in other dosimetry applications, including brachytherapy, skin dose measurement, lung and breast phantom measurements, total body irradiation (TBI), total skin electron therapy (TSET), electron therapy, stereotactic radiotherapy, the dosimetry characterization of proton therapy beams, and dose verification during cell irradiation in radiobiological experiments (18‐29) . These applications necessitate the study and characterization of the EBT3 radiochromic film for dose ranges above 8 Gy.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the uncertainty in an EBT3 film dosimetry system utilizing net optical density

Marroquin

González

López

et al. 2016

J Applied Clin Med Phys

141

115

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Radiochromic film has become an important tool to verify dose distributions for intensity‐modulated radiotherapy (IMRT) and quality assurance (QA) procedures. A new radiochromic film model, EBT3, has recently become available, whose composition and thickness of the sensitive layer are the same as those of previous EBT2 films. However, a matte polyester layer was added to EBT3 to prevent the formation of Newton's rings. Furthermore, the symmetrical design of EBT3 allows the user to eliminate side‐orientation dependence. This film and the flatbed scanner, Epson Perfection V750, form a dosimetry system whose intrinsic characteristics were studied in this work. In addition, uncertainties associated with these intrinsic characteristics and the total uncertainty of the dosimetry system were determined. The analysis of the response of the radiochromic film (net optical density) and the fitting of the experimental data to a potential function yielded an uncertainty of 2.6%, 4.3%, and 4.1% for the red, green, and blue channels, respectively. In this work, the dosimetry system presents an uncertainty in resolving the dose of 1.8% for doses greater than 0.8 Gy and less than 6 Gy for red channel. The films irradiated between 0 and 120 Gy show differences in the response when scanned in portrait or landscape mode; less uncertainty was found when using the portrait mode. The response of the film depended on the position on the bed of the scanner, contributing an uncertainty of 2% for the red, 3% for the green, and 4.5% for the blue when placing the film around the center of the bed of scanner. Furthermore, the uniformity and reproducibility radiochromic film and reproducibility of the response of the scanner contribute less than 1% to the overall uncertainty in dose. Finally, the total dose uncertainty was 3.2%, 4.9%, and 5.2% for red, green, and blue channels, respectively. The above uncertainty values were obtained by minimizing the contribution to the total dose uncertainty of the film orientation and film homogeneity.PACS number(s): 87.53.Bn

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Multi-dimensional dosimetric verification of stereotactic radiotherapy for uveal melanoma using radiochromic EBT film

Cited by 16 publications

References 22 publications

Report of AAPM Task Group 235 Radiochromic Film Dosimetry: An Update to TG‐55

Report of AAPM Task Group 235 Radiochromic Film Dosimetry: An Update to TG‐55

Radiochromic film dosimetry: Past, present, and future

Evaluation of the uncertainty in an EBT3 film dosimetry system utilizing net optical density

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