Assessment of accuracy of out-of-field dose calculations by TiGRT treatment planning system in radiotherapy

Toossi, Mohammad Taghi Bahreyni; Soleymanifard, Shokouhozaman; Farhood, Bagher; Mohebbi, Shokoufeh; Davenport, David

doi:10.4103/0973-1482.176423

Cited by 28 publications

(23 citation statements)

References 21 publications

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“…For outside field regions, the TiGRT TPS underestimated the dose compared to the measured doses by TLD-100. Our results related to out of field regions were consistent to several studies [26][27][28] ; as results of these studies showed that TiGRT TPS underestimated the dose of out-of-field regions for most points.…”

Section: Discussionsupporting

confidence: 92%

Evaluation of dose calculations accuracy of a commercial treatment planning system for the head and neck region in radiotherapy

Toossi

Farhood

Soleymanifard

2017

Reports of Practical Oncology & Radiotherapy

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Section: Discussionsupporting

confidence: 92%

Evaluation of dose calculations accuracy of a commercial treatment planning system for the head and neck region in radiotherapy

Toossi

Farhood

Soleymanifard

2017

Reports of Practical Oncology & Radiotherapy

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“…Morever, their findings demonstrated TPS underestimated dose of the outside field which is mentioned compared to the corresponding measurements. Farhood, et al [15] reported that TiGRT TPS underestimated the out-of-field dose for most points in physical wedged field and the confidence limit value for region was 55.24.…”

Section: Farhood B and Ghorbani Mmentioning

confidence: 98%

“…There are several studies which have quantified the dose calculation accuracy of different TPSs in out-of-field regions [5,[12][13][14][15][16]. In a study, Huang, et al [5] reported that Pinnacle TPS underestimates the out of field dose by an average of 50% for intensity modulated radiation therapy (IMRT) treatment plans and this underestimation is worsened with increasing distance from the edge of treatment field.…”

Section: Farhood B and Ghorbani Mmentioning

confidence: 99%

Dose Calculation Accuracy of Radiotherapy Treatment Planning Systems in Out-of-Field Regions

Farhood

Ghorbani

2019

J Biomed Phys Eng

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“…At the same time, there are several published works identifying the poor performance, including under-and over-estimation, of out-of-field dose calculation of specific TPSs 27,28,29 .…”

Section: Accepted Articlementioning

confidence: 99%

“…At the same time, there are several published works identifying the poor performance, including under‐ and over‐estimation, of out‐of‐field dose calculation of specific TPSs. 27 , 28 , 29 However, the accuracy of out‐of‐field dose calculation of the Monaco TPS, including the Graphics Processing Unit‐based Monte Carlo dose calculation algorithm (GPUMCD) in the magnetic field, has rarely been evaluated.…”

Section: Introductionmentioning

confidence: 99%

Out‐of‐field dose assessment for a 1.5 T MR‐Linac with optically stimulated luminescence dosimeters

et al. 2021

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To assess the out-of-field surface and internal dose of the 1.5T MR-Linac compared to the conventional external beam linac using optically stimulated luminescence dosimeters (OSLDs), and evaluate the out-of-field dose calculation accuracy of the Monaco treatment planning system of the 1.5T MR-Linac. Methods: A cubic solid water phantom, with OSLDs on the surface, was vertically irradiated by MR-Linac square fields with different sizes. In addition, OSLDs were arranged out of the beam edges in four directions. An anthropomorphic adult phantom, with 125 cm 3 simulated volume, was irradiated in 4 orthogonal directions by both MR-Linac and conventional linac at the head, thoracic, and pelvic sites. Out-of-field doses were measured by OSLDs on both the surface and internal emulational organs at risk (OARs). The results were compared to the simulated dose from Monaco treatment planning system (TPS). Results: At different field sizes (5 × 5 to 20 × 20 cm 2) and distances (1 to 10 cm) to beam edge, the out-of-field surface dose measured on MR-Linac varied from 0.16 % (10 cm to 5 × 5 cm 2 edge) to 7.02 % (1 cm to 20 × 20 cm 2 edge) of the maximum dose laterally and from 0.14 % (10 cm to 5 × 5 cm 2 edge) to 8.56 % (1 cm to 20 × 20 cm 2 edge) of the maximum dose longitudinally. Compared to the OSLDs measured data, the Monaco TPS presented an overestimate of the out-of-field dose of OARs at 0-2 % isodose area on both surface and internal check points, and the overestimation gets greater as the distance increases. The underestimation was found to be 0-35% at 2%-5% Accepted Article This article is protected by copyright. All rights reserved isodose area on both surface and internal check points. Compared to the conventional linac, MR-Linac delivered higher average values of out-of-field dose on surface check points (20 %, 19 %, 21 %) and internal simulated OARs (42 %, 37 %, 9 %) of the anthropomorphic phantom at head, thoracic and pelvic irradiations, respectively. Conclusions: Compared to the conventional linac, MR-Linac has the same out-of-field dose distribution. However, considering the absolute dose values, MR-Linac delivered relatively higher out-of-field doses on both surface and internal OARs. Additional radiation shielding to patients undergoing MR-Linac may provide protection from out-of-field exposure.

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Assessment of accuracy of out-of-field dose calculations by TiGRT treatment planning system in radiotherapy

Cited by 28 publications

References 21 publications

Evaluation of dose calculations accuracy of a commercial treatment planning system for the head and neck region in radiotherapy

Evaluation of dose calculations accuracy of a commercial treatment planning system for the head and neck region in radiotherapy

Dose Calculation Accuracy of Radiotherapy Treatment Planning Systems in Out-of-Field Regions

Out‐of‐field dose assessment for a 1.5 T MR‐Linac with optically stimulated luminescence dosimeters

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