Methodology for characterizing seeds under development for brachytherapy by means of radiochromic and photographic films

Meira-Belo, Luiz C.; Rodrigues, E.J.T.; Grynberg, Suely Epsztein

doi:10.1016/j.apradiso.2012.12.007

Cited by 2 publications

(2 citation statements)

References 11 publications

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“…In recent years, many attempts have been made to perform the dosimetry of

^{192} Ir

‐HDR brachytherapy sources using radiochromic films (RCFs) 5 , 6 , 7 , 8 , 9 . Piermattei et al (5) performed experimental dosimetry of the MicroSelectron HDR

^{192} Ir

source model 080950 (Elekta AB, Stockholm, Sweden), used for the brachytherapy of peripheral vessels in a water phantom with high sensitivity (HS) RCF.…”

Section: Introductionmentioning

confidence: 99%

Gafchromic film dosimetry of a new HDR brachytherapy source

Ayoobian

Asl

Poorbaygi³

et al. 2016

J Applied Clin Med Phys

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High‐dose‐rate (HDR) brachytherapy is a popular modality for treating cancers of the prostate, cervix, endometrium, breast, skin, bronchus, esophagus, and head and neck as well as soft‐tissue sarcomas. Because of different source designs and licensing issues, there is a need for specific dosimetry dataset for each HDR source model. The main objective of the present work is to measure 2D relative dose distribution around a new prototype 192Ir source, referred to as IRAsource‐HDR, in PMMA phantom in the framework of AAPM TG‐43 and TG‐55 recommendations for radial distances of 0.5 cm to 4 cm. Radiochromic films (RCFs) Gafchromic EBT and HD‐810 were used for measurements. The dose rate constant, Λ, of the source was determined to be 1.084±4.6%,1.129±4.4%, and 1.112±0.8% cGyh−1normalU−1 using EBTRCF, HD‐810 RCF, and Monte Carlo (MC) simulation, respectively. The results obtained in this study are in good agreement with previously published data for HDR interstitial 192Ir‐HDR sources with a maximum discrepancy of ±4.5%. An acceptable agreement (within ±2%) between MC calculations and RCFs measurements showed that HD‐810 RCF dosimetry is as good as EBTRCF, within HDR brachytherapy, and justifies the use of specific data for this new source. These data could be used as a benchmark for dose calculations in the conventional brachytherapy treatment planning systems.PACS number(s): 87.56.bg

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“…In recent years, many attempts have been made to perform the dosimetry of

^{192} Ir

‐HDR brachytherapy sources using radiochromic films (RCFs) 5 , 6 , 7 , 8 , 9 . Piermattei et al (5) performed experimental dosimetry of the MicroSelectron HDR

^{192} Ir

source model 080950 (Elekta AB, Stockholm, Sweden), used for the brachytherapy of peripheral vessels in a water phantom with high sensitivity (HS) RCF.…”

Section: Introductionmentioning

confidence: 99%

Gafchromic film dosimetry of a new HDR brachytherapy source

Ayoobian

Asl

Poorbaygi³

et al. 2016

J Applied Clin Med Phys

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“…Radio chromic film has been used as one of the beneficial dosimeters in the areas of high dose gradient, especially near the brachytherapy sources, where spatial resolution is essential [25][26][27]. Radio chromic film uses radiochemical process to impart a change in the optical absorbance of the film for specific wavelengths of light.…”

Section: Film Dosimetrymentioning

confidence: 99%

Estimation and Evaluation of Tissue Inhomogeneity Effect on Dose Distribution for High Dose Rate Iridium 192 Source Using Monte Carlo Simulation and Film Dosimetery

Adelnia¹,

Fatehi²

2016

J Nucl Med Radiat Ther

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The aim of this work was to present a theoretical analysis of how phantom dimensions and tissue heterogeneities in interstitial brachytherapy affect on dose distributions. This work was carried out using Gafchromic film measurement and Monte Carlo simulation for 192 Ir source. Results show that treatment planning systems (TPS) which consider the patient geometry as homogeneous medium, lead to a dose underestimation up to 8.2% for lung and an overestimation up to 9% for bone. These values depend on the thickness and distance from the source. Thus, TPSs currently in use for clinical brachytherapy cannot consider the effect of tissue heterogeneity on dose distribution.

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Methodology for characterizing seeds under development for brachytherapy by means of radiochromic and photographic films

Cited by 2 publications

References 11 publications

Gafchromic film dosimetry of a new HDR brachytherapy source

Gafchromic film dosimetry of a new HDR brachytherapy source

Estimation and Evaluation of Tissue Inhomogeneity Effect on Dose Distribution for High Dose Rate Iridium 192 Source Using Monte Carlo Simulation and Film Dosimetery

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