Design and evaluation of structural shielding of a typical radiotherapy facility using egsnrc monte carlo code

Ibitoye, A. Z.; Adedokun, Margret Bose; Orotoye, Temitope Aminat; Udo, Godwin Bassey

doi:10.4103/jmp.jmp_76_21

Cited by 3 publications

(1 citation statement)

References 13 publications

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“…Several widely-used general-purpose MC particle transport codes, such as EGSnrc, MCNP, GEANT4, and PHITS, are publicly accessible and have been found extensive applications in radiotherapy dosimetry [1] , [2] , [3] , [4] , [5] , [6] , [7] , [8] , [9] , [10] , [11] , [12] , [13] . Despite their given considerable benefits and potential applications, the intricate nature of these codes, coupled with their substantial computational demands, could indeed present a huge challenge for the implementation and execution of these codes in day-to-day clinical workflows.…”

Section: Introductionmentioning

confidence: 99%

An automation of Monte Carlo workflow for dosimetry study of an Elekta LINAC delivery system in radiotherapy

Tseng,

Furutani,

Beltran

et al. 2024

Technical Innovations & Patient Support in Radiation Oncolo

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Section: Introductionmentioning

confidence: 99%

An automation of Monte Carlo workflow for dosimetry study of an Elekta LINAC delivery system in radiotherapy

Tseng,

Furutani,

Beltran

et al. 2024

Technical Innovations & Patient Support in Radiation Oncolo

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On methods for radiometric surveying in radiotherapy bunkers

Sergio Santini,

de Oliveira,

Couto

et al. 2024

Biomed. Phys. Eng. Express

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Radiometric surveys in radiotherapy bunkers have been carried out in Brazil for many years, both by the same radiotherapy facility for verification of shielding as by the regulatory agency for licensing and control purposes.In recent years, the IMRT technique has been gradually incorporated into many facilities. Therefore, it has been necessary to consider the increased leakage component that has an important impact on the secondary walls. For that, a radiometric survey method has been used that considers an increased "time of beam - on" for the secondary walls. In this work we discuss two methods of doing this: the first considers that this "time of beam - on" affects the sum of the two components, leakage and scattered. In another method it is considered that only the leakage component is affected by this extended "time of beam - on ". We compare the methods and show that for secondary walls with $U=1$ the first method overestimates dose rates by important percentages and for secondary walls with $U<1$ it can both overestimate or underestimate the dose rates, depending on the parameters of the project. An optimized procedure is proposed, according to the use factor ($U$) of the secondary wall to be measured.

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Determination of Tissue Phantom Ratios of High Energy Photon Beams Using Monte Carlo Code

A.Z,

M.B,

I.K

2023

NJPAS

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Monte Carlo codes are veritable tools in radiotherapy to understand the transport mechanism, dose distributions, and energy depositions of ionizing radiations traversing in different media. In some beam calibration protocols, a tissue-phantom-ratio at depths 20 cm and 10 cm (TPR20,10) in a phantom is used to determine the beam-quality conversion factor for different ion chambers. Thus, this study aims to evaluate the efficiency of Monte Carlo code in the determination of beam quality of high radiation energy beams similar to what is expected in clinical settings. Electron Gamma Shower National Research Council in Canada (EGSnrc) Monte Carlo Code was used to design complex ion chamber geometries according to the manufacturer’s specifications. Phase space files were used as x-ray beam radiation sources. Two set-ups (SAD and SSD) methods were used for the determination of TPR20,10 to conform to the accepted clinical procedures. Beam collimation was 10 cm by 10 cm field size with an ionization chamber placed at 20 cm and 10 cm in the water phantom to obtain doses at two points respectively. The TPR20,10 of each energy was obtained using the appropriate equations. The obtained results showed no significant difference between the measured and available TPR 20,10 data (p = 0.995). Ion chamber configurations and specifications were also found not to have a significant effect (p = 0.33) on the TPR 20,10 obtained values. The results obtained in this study are in agreement with the recommended standard values. The findings of this study show that the Monte Carlo codes can be used as a tool in determining x-ray beam quality indices of designed clinical linear accelerator (Linac) machines.

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Design and evaluation of structural shielding of a typical radiotherapy facility using egsnrc monte carlo code

Cited by 3 publications

References 13 publications

An automation of Monte Carlo workflow for dosimetry study of an Elekta LINAC delivery system in radiotherapy

An automation of Monte Carlo workflow for dosimetry study of an Elekta LINAC delivery system in radiotherapy

On methods for radiometric surveying in radiotherapy bunkers

Determination of Tissue Phantom Ratios of High Energy Photon Beams Using Monte Carlo Code

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