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Effective usage of a clearance check to avoid a collision in Gamma Knife Perfexion radiosurgery with the Leksell skull frame
Skull frame attachment is one of the most significant issues with Gamma Knife radiosurgery. Because of the potential for suffering by patients, careful control of the frame position is required to avoid circumstances such as collision between the frame or the patient's head and the collimator h...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Oxford University Press
2014
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4229922/ https://www.ncbi.nlm.nih.gov/pubmed/24961516 http://dx.doi.org/10.1093/jrr/rru057 |
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author | Nakazawa, Hisato Tsugawa, Takahiko Mori, Yoshimasa Hagiwara, Masahiro Komori, Masataka Hashizume, Chisa Shibamoto, Yuta Kobayashi, Tatsuya |
author_facet | Nakazawa, Hisato Tsugawa, Takahiko Mori, Yoshimasa Hagiwara, Masahiro Komori, Masataka Hashizume, Chisa Shibamoto, Yuta Kobayashi, Tatsuya |
author_sort | Nakazawa, Hisato |
collection | PubMed |
description | Skull frame attachment is one of the most significant issues with Gamma Knife radiosurgery. Because of the potential for suffering by patients, careful control of the frame position is required to avoid circumstances such as collision between the frame or the patient's head and the collimator helmet, and inaccessible target coordinates. This study sought to develop a simulation method to find the appropriate frame location on the patient's head by retrospective analysis of treatment plans for brain metastasis cases. To validate the accuracy of the collision warning, we compared the collision distance calculated using Leksell GammaPlan (LGP) with actual measured distances. We then investigated isocenter coordinates in near-collision cases using data from 844 previously treated patients and created a clearance map by superimposing them on CT images for just the frame, post and stereotactic fiducial box. The differences in distance between the simulation in LGP and the measured values were <1.0 mm. In 177 patients, 213 lesions and 461 isocenters, there was a warning of one possible collision. The clearance map was helpful for simulating appropriate skull frame placement. The clearance simulation eliminates the psychological stress associated with potential collisions, and enables more comfortable treatment for the patient. |
format | Online Article Text |
id | pubmed-4229922 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2014 |
publisher | Oxford University Press |
record_format | MEDLINE/PubMed |
spelling | pubmed-42299222014-11-21 Effective usage of a clearance check to avoid a collision in Gamma Knife Perfexion radiosurgery with the Leksell skull frame Nakazawa, Hisato Tsugawa, Takahiko Mori, Yoshimasa Hagiwara, Masahiro Komori, Masataka Hashizume, Chisa Shibamoto, Yuta Kobayashi, Tatsuya J Radiat Res Technology Skull frame attachment is one of the most significant issues with Gamma Knife radiosurgery. Because of the potential for suffering by patients, careful control of the frame position is required to avoid circumstances such as collision between the frame or the patient's head and the collimator helmet, and inaccessible target coordinates. This study sought to develop a simulation method to find the appropriate frame location on the patient's head by retrospective analysis of treatment plans for brain metastasis cases. To validate the accuracy of the collision warning, we compared the collision distance calculated using Leksell GammaPlan (LGP) with actual measured distances. We then investigated isocenter coordinates in near-collision cases using data from 844 previously treated patients and created a clearance map by superimposing them on CT images for just the frame, post and stereotactic fiducial box. The differences in distance between the simulation in LGP and the measured values were <1.0 mm. In 177 patients, 213 lesions and 461 isocenters, there was a warning of one possible collision. The clearance map was helpful for simulating appropriate skull frame placement. The clearance simulation eliminates the psychological stress associated with potential collisions, and enables more comfortable treatment for the patient. Oxford University Press 2014-11 2014-06-24 /pmc/articles/PMC4229922/ /pubmed/24961516 http://dx.doi.org/10.1093/jrr/rru057 Text en © The Author 2014. Published by Oxford University Press on behalf of The Japan Radiation Research Society and Japanese Society for Radiation Oncology. http://creativecommons.org/licenses/by/4.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Technology Nakazawa, Hisato Tsugawa, Takahiko Mori, Yoshimasa Hagiwara, Masahiro Komori, Masataka Hashizume, Chisa Shibamoto, Yuta Kobayashi, Tatsuya Effective usage of a clearance check to avoid a collision in Gamma Knife Perfexion radiosurgery with the Leksell skull frame |
title | Effective usage of a clearance check to avoid a collision in Gamma Knife Perfexion radiosurgery with the Leksell skull frame |
title_full | Effective usage of a clearance check to avoid a collision in Gamma Knife Perfexion radiosurgery with the Leksell skull frame |
title_fullStr | Effective usage of a clearance check to avoid a collision in Gamma Knife Perfexion radiosurgery with the Leksell skull frame |
title_full_unstemmed | Effective usage of a clearance check to avoid a collision in Gamma Knife Perfexion radiosurgery with the Leksell skull frame |
title_short | Effective usage of a clearance check to avoid a collision in Gamma Knife Perfexion radiosurgery with the Leksell skull frame |
title_sort | effective usage of a clearance check to avoid a collision in gamma knife perfexion radiosurgery with the leksell skull frame |
topic | Technology |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4229922/ https://www.ncbi.nlm.nih.gov/pubmed/24961516 http://dx.doi.org/10.1093/jrr/rru057 |
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