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Quality assurance for a six degrees‐of‐freedom table using a 3D printed phantom

PURPOSE: To establish a streamlined end‐to‐end test of a 6 degrees‐of‐freedom (6DoF) robotic table using a 3D printed phantom for periodic quality assurance. METHODS: A 3D printed phantom was fabricated with translational and rotational offsets and an imbedded central ball‐bearing (BB). The phantom...

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Autores principales: Woods, Kyle, Ayan, Ahmet S., Woollard, Jeffrey, Gupta, Nilendu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5768004/
https://www.ncbi.nlm.nih.gov/pubmed/29159920
http://dx.doi.org/10.1002/acm2.12227
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author Woods, Kyle
Ayan, Ahmet S.
Woollard, Jeffrey
Gupta, Nilendu
author_facet Woods, Kyle
Ayan, Ahmet S.
Woollard, Jeffrey
Gupta, Nilendu
author_sort Woods, Kyle
collection PubMed
description PURPOSE: To establish a streamlined end‐to‐end test of a 6 degrees‐of‐freedom (6DoF) robotic table using a 3D printed phantom for periodic quality assurance. METHODS: A 3D printed phantom was fabricated with translational and rotational offsets and an imbedded central ball‐bearing (BB). The phantom underwent each step of the radiation therapy process: CT simulation in a straight orientation, plan generation using the treatment planning software, setup to offset marks at the linac, registration and corrected 6DoF table adjustments via hidden target test, delivery of a Winston‐Lutz test to the BB, and verification of table positioning via field and laser lights. The registration values, maximum total displacement of the combined Winston‐Lutz fields, and a pass or fail criterion of the laser and field lights were recorded. The quality assurance process for each of the three linacs were performed for the first 30 days. RESULTS: Within a 95% confidence interval, the overall uncertainty values for both translation and rotation were below 1.0 mm and 0.5° for each linac respectively. When combining the registration values and other uncertainties for all three linacs, the average deviations were within 2.0 mm and 1.0° of the designed translation and rotation offsets of the 3D print respectively. For all three linacs, the maximum total deviation for the Winston‐Lutz test did not exceed 1.0 mm. Laser and light field verification was within tolerance every day for all three linacs given the latest guidance documentation for table repositioning. CONCLUSION: The 3D printer is capable of accurately fabricating a quality assurance phantom for 6DoF positioning verification. The end‐to‐end workflow allows for a more efficient test of the 6DoF mechanics while including other important tests needed for routine quality assurance.
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spelling pubmed-57680042018-04-02 Quality assurance for a six degrees‐of‐freedom table using a 3D printed phantom Woods, Kyle Ayan, Ahmet S. Woollard, Jeffrey Gupta, Nilendu J Appl Clin Med Phys Radiation Oncology Physics PURPOSE: To establish a streamlined end‐to‐end test of a 6 degrees‐of‐freedom (6DoF) robotic table using a 3D printed phantom for periodic quality assurance. METHODS: A 3D printed phantom was fabricated with translational and rotational offsets and an imbedded central ball‐bearing (BB). The phantom underwent each step of the radiation therapy process: CT simulation in a straight orientation, plan generation using the treatment planning software, setup to offset marks at the linac, registration and corrected 6DoF table adjustments via hidden target test, delivery of a Winston‐Lutz test to the BB, and verification of table positioning via field and laser lights. The registration values, maximum total displacement of the combined Winston‐Lutz fields, and a pass or fail criterion of the laser and field lights were recorded. The quality assurance process for each of the three linacs were performed for the first 30 days. RESULTS: Within a 95% confidence interval, the overall uncertainty values for both translation and rotation were below 1.0 mm and 0.5° for each linac respectively. When combining the registration values and other uncertainties for all three linacs, the average deviations were within 2.0 mm and 1.0° of the designed translation and rotation offsets of the 3D print respectively. For all three linacs, the maximum total deviation for the Winston‐Lutz test did not exceed 1.0 mm. Laser and light field verification was within tolerance every day for all three linacs given the latest guidance documentation for table repositioning. CONCLUSION: The 3D printer is capable of accurately fabricating a quality assurance phantom for 6DoF positioning verification. The end‐to‐end workflow allows for a more efficient test of the 6DoF mechanics while including other important tests needed for routine quality assurance. John Wiley and Sons Inc. 2017-11-21 /pmc/articles/PMC5768004/ /pubmed/29159920 http://dx.doi.org/10.1002/acm2.12227 Text en © 2017 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 Creative Commons Attribution (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
Woods, Kyle
Ayan, Ahmet S.
Woollard, Jeffrey
Gupta, Nilendu
Quality assurance for a six degrees‐of‐freedom table using a 3D printed phantom
title Quality assurance for a six degrees‐of‐freedom table using a 3D printed phantom
title_full Quality assurance for a six degrees‐of‐freedom table using a 3D printed phantom
title_fullStr Quality assurance for a six degrees‐of‐freedom table using a 3D printed phantom
title_full_unstemmed Quality assurance for a six degrees‐of‐freedom table using a 3D printed phantom
title_short Quality assurance for a six degrees‐of‐freedom table using a 3D printed phantom
title_sort quality assurance for a six degrees‐of‐freedom table using a 3d printed phantom
topic Radiation Oncology Physics
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5768004/
https://www.ncbi.nlm.nih.gov/pubmed/29159920
http://dx.doi.org/10.1002/acm2.12227
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