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Prediction of conical collimator collision for stereotactic radiosurgery

The purpose of this study is to predict the collision clearance distance of stereotactic cones with treatment setup devices in cone‐based stereotactic radiosurgery (SRS). The BrainLAB radiosurgery system with a Frameless Radiosurgery Positioning Array and dedicated couch top was targeted in this stu...

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Autores principales: Park, Jeonghoon, McDermott, Ryan, Kim, Sangroh, Huq, M. Saiful
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7497939/
https://www.ncbi.nlm.nih.gov/pubmed/32627949
http://dx.doi.org/10.1002/acm2.12963
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author Park, Jeonghoon
McDermott, Ryan
Kim, Sangroh
Huq, M. Saiful
author_facet Park, Jeonghoon
McDermott, Ryan
Kim, Sangroh
Huq, M. Saiful
author_sort Park, Jeonghoon
collection PubMed
description The purpose of this study is to predict the collision clearance distance of stereotactic cones with treatment setup devices in cone‐based stereotactic radiosurgery (SRS). The BrainLAB radiosurgery system with a Frameless Radiosurgery Positioning Array and dedicated couch top was targeted in this study. The positioning array and couch top were scanned with CT simulators, and their outer contours of were detected. The minimum clearance distance was estimated by calculating the Euclidian distances between the surface of the SRS cones and the nearest surface of the outer contours. The coordinate transformation of the outer contour was performed by incorporating the Beam's Eye View at a planned arc range and couch angle. From the minimum clearance distance, the collision‐free gantry ranges for each couch angle were sequentially determined. An in‐house software was developed to calculate the clearance distance between the cone surface and the outer contours, and thus determine the occurrence of a collision. The software was extensively tested for various combinations of couch and arc angles at multiple isocenter locations for two combinations of cone‐couch systems. A total of 50 arcs were used to validate the calculation accuracies of the software for each system. The calculated minimum distances and collision‐free angles from the software were verified by physical measurements. The calculated minimum distances were found to agree with the measurements to within 0.3 ± 0.9 mm. The collision‐free arc angles from the software also agreed with the measurements to within 1.1 ± 1.1° with a 5‐mm safety margin for 20 arcs. In conclusion, the in‐house software was able to calculate the minimum clearance distance with <1.0 mm accuracy and to determine the collision‐free arc range for the cone‐based BrainLab SRS system.
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spelling pubmed-74979392020-09-25 Prediction of conical collimator collision for stereotactic radiosurgery Park, Jeonghoon McDermott, Ryan Kim, Sangroh Huq, M. Saiful J Appl Clin Med Phys Radiation Oncology Physics The purpose of this study is to predict the collision clearance distance of stereotactic cones with treatment setup devices in cone‐based stereotactic radiosurgery (SRS). The BrainLAB radiosurgery system with a Frameless Radiosurgery Positioning Array and dedicated couch top was targeted in this study. The positioning array and couch top were scanned with CT simulators, and their outer contours of were detected. The minimum clearance distance was estimated by calculating the Euclidian distances between the surface of the SRS cones and the nearest surface of the outer contours. The coordinate transformation of the outer contour was performed by incorporating the Beam's Eye View at a planned arc range and couch angle. From the minimum clearance distance, the collision‐free gantry ranges for each couch angle were sequentially determined. An in‐house software was developed to calculate the clearance distance between the cone surface and the outer contours, and thus determine the occurrence of a collision. The software was extensively tested for various combinations of couch and arc angles at multiple isocenter locations for two combinations of cone‐couch systems. A total of 50 arcs were used to validate the calculation accuracies of the software for each system. The calculated minimum distances and collision‐free angles from the software were verified by physical measurements. The calculated minimum distances were found to agree with the measurements to within 0.3 ± 0.9 mm. The collision‐free arc angles from the software also agreed with the measurements to within 1.1 ± 1.1° with a 5‐mm safety margin for 20 arcs. In conclusion, the in‐house software was able to calculate the minimum clearance distance with <1.0 mm accuracy and to determine the collision‐free arc range for the cone‐based BrainLab SRS system. John Wiley and Sons Inc. 2020-07-06 /pmc/articles/PMC7497939/ /pubmed/32627949 http://dx.doi.org/10.1002/acm2.12963 Text en © 2020 The Authors. Journal of Applied Clinical Medical Physics published by Wiley Periodicals, Inc. on behalf of American Association of Physicists in Medicine. This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Radiation Oncology Physics
Park, Jeonghoon
McDermott, Ryan
Kim, Sangroh
Huq, M. Saiful
Prediction of conical collimator collision for stereotactic radiosurgery
title Prediction of conical collimator collision for stereotactic radiosurgery
title_full Prediction of conical collimator collision for stereotactic radiosurgery
title_fullStr Prediction of conical collimator collision for stereotactic radiosurgery
title_full_unstemmed Prediction of conical collimator collision for stereotactic radiosurgery
title_short Prediction of conical collimator collision for stereotactic radiosurgery
title_sort prediction of conical collimator collision for stereotactic radiosurgery
topic Radiation Oncology Physics
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7497939/
https://www.ncbi.nlm.nih.gov/pubmed/32627949
http://dx.doi.org/10.1002/acm2.12963
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