Radiochromic film dosimetry of HDR <sup>192</sup>Ir source radiation fields

Aldelaijan, Saad; Mohammed, Huriyyah; Tomic, Nada; Liang, LiHeng; DeBlois, F; Sarfehnia, Arman; Abdel-Rahman, W; Seuntjens, J; Dević, Slobodan

doi:10.1118/1.3651482

Cited by 48 publications

(55 citation statements)

References 37 publications

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“…The EBT3 estimated uncertainty is presented in the uncertainties were estimated from the literature, 32,43 assuming that EBT2 film (used by Aldelaijan et al 32 and Fonseca et al 43 ) is similar for the EBT3 model. For the response correction uncertainty, based in the estimated uncertainties of the 192 Ir film calibration fitting function, an estimated value of 0.7% was chosen.…”

Section: Methodsmentioning

confidence: 99%

“…Radiochromic film has been applied extensively in external beam radiotherapy (EBRT) and brachytherapy. [29][30][31][32][33] The film used for this work was the third generation of the Gafchromic ® film, model EBT3 (Ashland, Inc., Wayne, NJ). All films used by this work were cut into (3 × 3) cm 2 pieces from the same batch (Lot No.…”

Section: B2 Radiochromic Filmsmentioning

confidence: 99%

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Development of a phantom to validate high‐dose‐rate brachytherapy treatment planning systems with heterogeneous algorithms

et al. 2015

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The results derived from the phantom measurements show good agreement with the simulations and TPS calculations, using Acuros™ algorithm. Differences in the dose responses were evident in the experimental results when heterogeneous materials were introduced. These measurements prove the usefulness of the heterogeneous phantom for verification of HDR treatment planning systems based on model-based dose calculation algorithms.

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Section: Methodsmentioning

confidence: 99%

Section: B2 Radiochromic Filmsmentioning

confidence: 99%

Development of a phantom to validate high‐dose‐rate brachytherapy treatment planning systems with heterogeneous algorithms

et al. 2015

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“…These include thermoluminescent dosimeters [17–20], ionisation chambers [21], semiconductor diodes [18], MOSFETS [22, 23], radiochromic film [24–28] and Polymer or Fricke gel dosimetry [29]. Theoretical Monte Carlo (MC) calculations have also been extensively utilised [17, 18, 30–35].…”

Section: Review Of Physics-processes In Hdr Brachytherapymentioning

confidence: 99%

“…Aldelaijan et al . [24] have shown that radiochromic film may be used in either solid water-equivalent materials or liquid water when performing radiochromic film based dosimetry with HDR brachytherapy sources, extending its usefulness. The use of polymer gel dosimetry to measure dose distribution around HDR brachytherapy sources was initially complicated due to oxygen contamination and other practical issues [44].…”

Section: Review Of Physics-processes In Hdr Brachytherapymentioning

confidence: 99%

Physics-aspects of dose accuracy in high dose rate (HDR) brachytherapy: source dosimetry, treatment planning, equipment performance and in vivo verification techniques

Palmer¹,

Bradley²,

Nisbet³

2012

jcb

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This study provides a review of recent publications on the physics-aspects of dosimetric accuracy in high dose rate (HDR) brachytherapy. The discussion of accuracy is primarily concerned with uncertainties, but methods to improve dose conformation to the prescribed intended dose distribution are also noted. The main aim of the paper is to review current practical techniques and methods employed for HDR brachytherapy dosimetry. This includes work on the determination of dose rate fields around brachytherapy sources, the capability of treatment planning systems, the performance of treatment units and methods to verify dose delivery. This work highlights the determinants of accuracy in HDR dosimetry and treatment delivery and presents a selection of papers, focusing on articles from the last five years, to reflect active areas of research and development. Apart from Monte Carlo modelling of source dosimetry, there is no clear consensus on the optimum techniques to be used to assure dosimetric accuracy through all the processes involved in HDR brachytherapy treatment. With the exception of the ESTRO mailed dosimetry service, there is little dosimetric audit activity reported in the literature, when compared with external beam radiotherapy verification.

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“…The accurate results of GafChoromic TM %ilm dosimetry signi%icantly depend on the position accuracy of the source with respect to the point of interest (12) . A special attention was paid to the distances between the phantom's edge and edge of the applicator and the %ilm.…”

Section: Uncertainty Analysismentioning

confidence: 99%

A novel phantom design for brachytherapy quality assurance

Gholami

Arfaee²,

Jaberi

et al. 2016

IJRR

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Background: One major challenge in brachytherapy is to verify the accuracy of dose distribu ons calculated by the treatment planning system. In this project, a new phantom design has been introduced for quality assurance of dose distribu ons in gynocological (GYN) brachytherapy implants using EBT GafChromic film. Materials and Methods: This phantom has been designed and fabricated from 90 slabs of 18×16×0.2 cm 3 Perspex to accommodate a tandem and ovoids assembly, which is normally used for GYN brachytherapy treatment. In addi on, this phantom design is allowing the use EBT GafChromic films for dosimetric verifica on of GYN implants with Cs-137 Selectron LDR system. With this assembly, GafChromic films were exposed using a plan designed to deliver 2.5 Gy dose to point "A" in Manchester system for tandem and ovoids configura ons and to deliver 1.5 Gy of dose to 0.5 cm distance from the lateral surface of ovoids for using ovoid-pair. The measured dose distribu ons with GafChromic films were compared with the TPS isodose lines both numerically and spa ally. For a quan ta ve analysis of the results, the measured doses values at several points of interest were evaluated with the treatment planning data and values obtained following the TG-43 dose calcula on formalism. Results: The results of these inves ga ons have indicated that the new phantom design enables us to measure differences of greater than ±6% for LDR brachytherapy GYN treatments. Conclusion:The new phantom design could be u lized for the QA procedure of the brachytherapy remote aCer loading systems to confirm the accuracy of dose distribu on in GYN implants.

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Radiochromic film dosimetry of HDR ¹⁹²Ir source radiation fields

Cited by 48 publications

References 37 publications

Development of a phantom to validate high‐dose‐rate brachytherapy treatment planning systems with heterogeneous algorithms

Development of a phantom to validate high‐dose‐rate brachytherapy treatment planning systems with heterogeneous algorithms

Physics-aspects of dose accuracy in high dose rate (HDR) brachytherapy: source dosimetry, treatment planning, equipment performance and in vivo verification techniques

A novel phantom design for brachytherapy quality assurance

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Radiochromic film dosimetry of HDR 192Ir source radiation fields

Cited by 48 publications

References 37 publications

Development of a phantom to validate high‐dose‐rate brachytherapy treatment planning systems with heterogeneous algorithms

Development of a phantom to validate high‐dose‐rate brachytherapy treatment planning systems with heterogeneous algorithms

Physics-aspects of dose accuracy in high dose rate (HDR) brachytherapy: source dosimetry, treatment planning, equipment performance and in vivo verification techniques

A novel phantom design for brachytherapy quality assurance

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Radiochromic film dosimetry of HDR ¹⁹²Ir source radiation fields