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

Abstract

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.

EGSnrc Monte Carlo-aided dosimetric studies of the new BEBIG 60 Co HDR brachytherapy source

“…The density of water considered is 0.998 g/cm 3 at 22°C [1]. In order to provide adequate spatial resolution, the cells are 0.01 cm thickness for r < 2 cm, 0.05 cm for 2 < r < 5 cm, 0.1 cm for 5 < r < 10 cm and 0.2 cm for r > 10 cm from the source [2, 10]. The dose rate values are calculated in different positions of the water phantom with polar and Cartesian co-ordinates for different position of the water phantom.…”

A radiation quality correction factor kQ for well‐type ionization chambers for the measurement of the reference air kerma rate of 60Co HDR brachytherapy sources

“…The relatively small differences in the radial dose distribution of 60 Co sources compared to 192 Ir sources 5,6 do not result in clinically significant effects. 1,2,4,5,7,8 Different companies provide 60 Co HDR brachytherapy sources [9][10][11][12] and at least 200 remote afterloader systems equipped with 60 Co are presently in operation worldwide. 3 The dosimetric verification of a 60 Co brachytherapy source in a hospital using an in-air experimental set-up is complex and time-consuming [13][14][15][16][17] and may be error-prone, among other things, due to lack of guidelines for 60 Co sources in the existing dosimetry protocols.…”

Dosimetric study of GZP6 60Co high dose rate brachytherapy source

“…(2012) used the MCNP4C Monte Carlo code to obtain the dosimetric parameters of GZP6 60 Co sources. However, in the study of Vijande et al ,. it is indicated that the radial dose function from the study of Tabrizi et al.…”

“…This work comprises a full and MC‐based dosimetry report for GZP6 60 Co source number 3 according to the recommendations of the American Association of Physicists in Medicine (AAPM) and the European Society for Radiotherapy and Oncology (ESTRO) on dose calculations for high‐energy (average energy higher than 50 keV) photon‐emitting brachytherapy sources . The calculated dosimetric parameters were compared with the available data of the similar 60 Co high dose rate (HDR) sources and the detailed dosimetric characterization of GZP6 60 Co source number 3 was discussed.…”