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Evaluation of technical performance of optical surface imaging system using conventional and novel stereotactic radiosurgery algorithms

The Catalyst HD (C‐RAD Positioning AB, Uppsala, Sweden) optical surface imaging (OSI) system is able to manage interfractional patient positioning, intrafractional motion monitoring, and non‐contact respiratory gating without x‐ray exposure for radiation therapy. In recent years, a novel high‐precis...

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Autores principales: Kojima, Hironori, Takemura, Akihiro, Kurokawa, Shogo, Ueda, Shinichi, Noto, Kimiya, Yokoyama, Haruna, Takamatsu, Shigeyuki
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/PMC7882109/
https://www.ncbi.nlm.nih.gov/pubmed/33369014
http://dx.doi.org/10.1002/acm2.13152
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author Kojima, Hironori
Takemura, Akihiro
Kurokawa, Shogo
Ueda, Shinichi
Noto, Kimiya
Yokoyama, Haruna
Takamatsu, Shigeyuki
author_facet Kojima, Hironori
Takemura, Akihiro
Kurokawa, Shogo
Ueda, Shinichi
Noto, Kimiya
Yokoyama, Haruna
Takamatsu, Shigeyuki
author_sort Kojima, Hironori
collection PubMed
description The Catalyst HD (C‐RAD Positioning AB, Uppsala, Sweden) optical surface imaging (OSI) system is able to manage interfractional patient positioning, intrafractional motion monitoring, and non‐contact respiratory gating without x‐ray exposure for radiation therapy. In recent years, a novel high‐precision surface registration algorithm for stereotactic radiosurgery (SRS algorithm) has been released. This study aimed to evaluate the technical performance of the OSI system using rigid phantoms, by comparing the conventional and SRS algorithms. To determine the system’s technical performance, isocenter displacements were calculated by surface image registration via the OSI system using head, thorax, and pelvis rigid phantoms. The reproducibility of positioning was evaluated by the mean value calculated by repeating the registration 10 times, without moving each phantom. The accuracy of positioning was evaluated by the mean value of the residual error, where the 10 offset values given to each phantom were subtracted from the isocenter displacement values. The stability of motion monitoring was evaluated by measuring isocenter drift during 20 min and averaging it over 10 measurements. For the head phantom, all tests were compared with the mask types and algorithms. As a result, for all sites and both algorithms, the reproducibility, accuracy, and stability for translation and rotation were <0.1 mm and <0.1°, <1.0 mm and <1.0°, and <0.1 mm and <0.1°, respectively. In particular, the SRS algorithm had a small absolute error and standard deviation of calculated isocenter displacement, and a significantly higher reproducibility and accuracy than the conventional algorithm (P < 0.01). There was no difference in the stability between the algorithms (P = 0.0280). The SRS algorithm was found to be suitable for the treatment of rigid body sites with less deformation and small area, such as the head and face.
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spelling pubmed-78821092021-02-19 Evaluation of technical performance of optical surface imaging system using conventional and novel stereotactic radiosurgery algorithms Kojima, Hironori Takemura, Akihiro Kurokawa, Shogo Ueda, Shinichi Noto, Kimiya Yokoyama, Haruna Takamatsu, Shigeyuki J Appl Clin Med Phys Radiation Oncology Physics The Catalyst HD (C‐RAD Positioning AB, Uppsala, Sweden) optical surface imaging (OSI) system is able to manage interfractional patient positioning, intrafractional motion monitoring, and non‐contact respiratory gating without x‐ray exposure for radiation therapy. In recent years, a novel high‐precision surface registration algorithm for stereotactic radiosurgery (SRS algorithm) has been released. This study aimed to evaluate the technical performance of the OSI system using rigid phantoms, by comparing the conventional and SRS algorithms. To determine the system’s technical performance, isocenter displacements were calculated by surface image registration via the OSI system using head, thorax, and pelvis rigid phantoms. The reproducibility of positioning was evaluated by the mean value calculated by repeating the registration 10 times, without moving each phantom. The accuracy of positioning was evaluated by the mean value of the residual error, where the 10 offset values given to each phantom were subtracted from the isocenter displacement values. The stability of motion monitoring was evaluated by measuring isocenter drift during 20 min and averaging it over 10 measurements. For the head phantom, all tests were compared with the mask types and algorithms. As a result, for all sites and both algorithms, the reproducibility, accuracy, and stability for translation and rotation were <0.1 mm and <0.1°, <1.0 mm and <1.0°, and <0.1 mm and <0.1°, respectively. In particular, the SRS algorithm had a small absolute error and standard deviation of calculated isocenter displacement, and a significantly higher reproducibility and accuracy than the conventional algorithm (P < 0.01). There was no difference in the stability between the algorithms (P = 0.0280). The SRS algorithm was found to be suitable for the treatment of rigid body sites with less deformation and small area, such as the head and face. John Wiley and Sons Inc. 2020-12-27 /pmc/articles/PMC7882109/ /pubmed/33369014 http://dx.doi.org/10.1002/acm2.13152 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
Kojima, Hironori
Takemura, Akihiro
Kurokawa, Shogo
Ueda, Shinichi
Noto, Kimiya
Yokoyama, Haruna
Takamatsu, Shigeyuki
Evaluation of technical performance of optical surface imaging system using conventional and novel stereotactic radiosurgery algorithms
title Evaluation of technical performance of optical surface imaging system using conventional and novel stereotactic radiosurgery algorithms
title_full Evaluation of technical performance of optical surface imaging system using conventional and novel stereotactic radiosurgery algorithms
title_fullStr Evaluation of technical performance of optical surface imaging system using conventional and novel stereotactic radiosurgery algorithms
title_full_unstemmed Evaluation of technical performance of optical surface imaging system using conventional and novel stereotactic radiosurgery algorithms
title_short Evaluation of technical performance of optical surface imaging system using conventional and novel stereotactic radiosurgery algorithms
title_sort evaluation of technical performance of optical surface imaging system using conventional and novel stereotactic radiosurgery algorithms
topic Radiation Oncology Physics
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7882109/
https://www.ncbi.nlm.nih.gov/pubmed/33369014
http://dx.doi.org/10.1002/acm2.13152
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