Monte Carlo derivation of AAPM TG-43 dosimetric parameters for GZP6 Co-60 HDR sources

Tabrizi, Sanaz Hariri; Kamali-Asl, Alireza; Azma, Zohreh

doi:10.1016/j.ejmp.2011.04.004

Cited by 5 publications

(6 citation statements)

References 15 publications

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“…2A with corresponding data to GK60M21 [13] and Co0.A86 [11] sources from BEBIG, Ralstron HDR Type 2 [23] from Shimazdu and GZP6 sources [26]. Figure 2B illustrates similarities/differences for r < 1 cm.…”

Section: Discussionmentioning

confidence: 96%

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Monte Carlo dosimetric study of the Flexisource Co-60 high dose rate source

Vijande¹,

Granero²,

Pérez‐Calatayud³

et al. 2012

jcb

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PurposeRecently, a new HDR 60Co brachytherapy source, Flexisource Co-60, has been developed (Nucletron B.V. Veenendaal, The Netherlands). This study aims to obtain dosimetric data for this source for its use in clinical practice as required by AAPM and ESTRO.Material and methodsTwo Monte Carlo radiation transport codes were used: Penelope2008 and GEANT4. The source was centrally-positioned in a 100 cm radius water phantom. Absorbed dose and collisional kerma were obtained using 0.01 cm (close) and 0.1 cm (far) sized voxels to provide high-resolution dosimetry near (far from) the source. Dose rate distributions obtained with the two Monte Carlo codes were compared.Results and DiscussionSimulations performed with those two radiation transport codes showed an agreement typically within 0.2% for r > 0.8 cm and up to 2% closer to the source. Detailed results of dose distributions are being made available.ConclusionsDosimetric data are provided for the new Flexisource Co-60 source. These data are meant to be used in treatment planning systems in clinical practice.

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Section: Discussionmentioning

confidence: 96%

“…[26] studied two different 60 Co linear braid type sources available for the GZP6 remote afterloader (Nuclear Power Institute of China). These sources are composed of one active core made of metallic 60 Co with 3.5 mm length and 1.5 mm diameter, encapsulated in 0.1 mm titanium.…”

Section: Discussionmentioning

confidence: 99%

Monte Carlo dosimetric study of the Flexisource Co-60 high dose rate source

Vijande¹,

Granero²,

Pérez‐Calatayud³

et al. 2012

jcb

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“…This radionuclide has a 5.27 year half-life and emits two gamma rays per disintegration with a mean energy of 1.25 MeV. Presently, there are three different HDR 60 Co source models that are available for clinical applications [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 ]. These systems are the model GZP6 HDR manufactured by the Nuclear Power Institute of China (Chengdu, China) [ 1 , 2 , 3 , 4 , 5 ], the Ralstron remote afterloader (Shimadzu Corporation, Japan) [ 6 ], and the BEBIG Multi-Source remote afterloader (Eckert & Ziegler BEBIG GmbH, Berlin, Germany) [ 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 ].…”

Section: Purposementioning

confidence: 99%

Evaluation of BEBIG HDR 60 Co system for non-invasive image-guided breast brachytherapy

Zehtabian¹,

Sina²,

Rivard³

et al. 2015

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PurposeHDR 60Co system has recently been developed and utilized for brachytherapy in many countries outside of the U.S. as an alternative to 192Ir. In addition, the AccuBoost® technique has been demonstrated to be a successful non-invasive image-guided breast brachytherapy treatment option. The goal of this project is to evaluate the possibility of utilizing the BEBIG HDR 60Co system for AccuBoost treatment. These evaluations are performed with Monte Carlo (MC) simulation technique.Material and methodsIn this project, the MC calculated dose distributions from HDR 60Co for various breast sizes have been compared with the simulated data using an HDR 192Ir source. These calculations were performed using the MCNP5 code. The initial calculations were made with the same applicator dimensions as the ones used with the HDR 192Ir system (referred here after as standard applicator). The activity of the 60Co source was selected such that the dose at the center of the breast would be the same as the values from the 192Ir source. Then, the applicator wall-thickness for the HDR 60Co system was increased to diminish skin dose to levels received when using the HDR 192Ir system. With this geometry, dose values to the chest wall and the skin were evaluated. Finally, the impact of a conical attenuator with the modified applicator for the HDR 60Co system was analyzed.ResultsThese investigations demonstrated that loading the 60Co sources inside the thick-walled applicators created similar dose distributions to those of the 192Ir source in the standard applicators. However, dose to the chest wall and breast skin with 60Co source was reduced using the thick-walled applicators relative to the standard applicators. The applicators with conical attenuator reduced the skin dose for both source types.ConclusionsThe AccuBoost treatment can be performed with the 60Co source and thick-wall applicators instead of 192Ir with standard applicators.

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“…5 There are various studies on TG-43 dosimetric evaluation of the parameters, as well as tabulated dose rate distributions of GZP6 sources. [6][7][8][9] Mesbahi et al have evaluated radial dose function for three GZP6 brachytherapy 60 Co sources. They have compared the Monte Carlo calculated radial dose function values with those obtained from GZP6 treatment planning system and their results have shown that there is a good agreement between the Monte Carlo and treatment planning system values, except for points close to the source.…”

Section: Introductionmentioning

confidence: 99%

“…Their results can be used for validation of the GZP6 treatment planning system and also for introduction of a complementary software for this system. 9 However, the GZP6 treatment planning system still performs the treatment planning based on Sievert integral and there are several prefixed treatment plans with predesigned dwell positions and dwell times in tandem and ovoids for gynecological implants. Therefore, a clinical application of these units requires in vivo dosimetry for a more accurate evaluation of dose received by normal organs at risk, for patients who are being treated by this system.…”

Section: Introductionmentioning

confidence: 99%