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Dosimetric, mechanical, and geometric verification of conformal dynamic arc treatment

A conformal dynamic arc (CD‐arc) technique has been implemented at the S. Giovanni Calibita‐Fatebenefratelli Hospital Radiotherapy Center. This technique is performed by rotational beams and a dynamic multileaf collimator (DMLC): during the treatment delivery the gantry rotates and the field shape,...

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Autores principales: Malatesta, T., Landoni, V., delle Canne, S., Bufacchi, A., Marmiroli, L., Caspiani, O., Bonanni, A., Tortoreto, F., Leone, M. V., Capparella, R., Fragomeni, R., Begnozzi, L.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2003
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5724444/
https://www.ncbi.nlm.nih.gov/pubmed/12841789
http://dx.doi.org/10.1120/jacmp.v4i3.2515
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author Malatesta, T.
Landoni, V.
delle Canne, S.
Bufacchi, A.
Marmiroli, L.
Caspiani, O.
Bonanni, A.
Tortoreto, F.
Leone, M. V.
Capparella, R.
Fragomeni, R.
Begnozzi, L.
author_facet Malatesta, T.
Landoni, V.
delle Canne, S.
Bufacchi, A.
Marmiroli, L.
Caspiani, O.
Bonanni, A.
Tortoreto, F.
Leone, M. V.
Capparella, R.
Fragomeni, R.
Begnozzi, L.
author_sort Malatesta, T.
collection PubMed
description A conformal dynamic arc (CD‐arc) technique has been implemented at the S. Giovanni Calibita‐Fatebenefratelli Hospital Radiotherapy Center. This technique is performed by rotational beams and a dynamic multileaf collimator (DMLC): during the treatment delivery the gantry rotates and the field shape, formed by the DMLC changes continuously. The aim of this study was to perform dosimetric, mechanical, and geometric verification to ensure that the dose calculated by a commercial treatment planning system and administered to the patient was correct, before and during the clinical use of this technique. Absolute dose values, at the isocenter and at other points placed in dose heterogeneity zone, have been verified with an ionization chamber in a solid homogeneous phantom. In uniform dose regions measured dose values resulted in agreements with the calculated doses within 2%. Isodose distributions have also been determined by radiographic films and compared with those predicted by the planning system. Distance to agreement between calculated and measured isodoses in dose gradient zone was within 2 mm. In conclusion, our results demonstrated the feasibility and the accuracy of the CD‐arc technique for achieving highly conformal dose distributions. Up till now 20 patients have been treated with CD‐arc therapy. PACS number(s): 87.53.Kn, 87.53.Dq, 87.53.Oq, 87.53.St, 87.53.Tf
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spelling pubmed-57244442018-04-02 Dosimetric, mechanical, and geometric verification of conformal dynamic arc treatment Malatesta, T. Landoni, V. delle Canne, S. Bufacchi, A. Marmiroli, L. Caspiani, O. Bonanni, A. Tortoreto, F. Leone, M. V. Capparella, R. Fragomeni, R. Begnozzi, L. J Appl Clin Med Phys Radiation Oncology Physics A conformal dynamic arc (CD‐arc) technique has been implemented at the S. Giovanni Calibita‐Fatebenefratelli Hospital Radiotherapy Center. This technique is performed by rotational beams and a dynamic multileaf collimator (DMLC): during the treatment delivery the gantry rotates and the field shape, formed by the DMLC changes continuously. The aim of this study was to perform dosimetric, mechanical, and geometric verification to ensure that the dose calculated by a commercial treatment planning system and administered to the patient was correct, before and during the clinical use of this technique. Absolute dose values, at the isocenter and at other points placed in dose heterogeneity zone, have been verified with an ionization chamber in a solid homogeneous phantom. In uniform dose regions measured dose values resulted in agreements with the calculated doses within 2%. Isodose distributions have also been determined by radiographic films and compared with those predicted by the planning system. Distance to agreement between calculated and measured isodoses in dose gradient zone was within 2 mm. In conclusion, our results demonstrated the feasibility and the accuracy of the CD‐arc technique for achieving highly conformal dose distributions. Up till now 20 patients have been treated with CD‐arc therapy. PACS number(s): 87.53.Kn, 87.53.Dq, 87.53.Oq, 87.53.St, 87.53.Tf John Wiley and Sons Inc. 2003-06-01 /pmc/articles/PMC5724444/ /pubmed/12841789 http://dx.doi.org/10.1120/jacmp.v4i3.2515 Text en © 2003 The Authors. This is an open access article under the terms of the Creative Commons Attribution (http://creativecommons.org/licenses/by/3.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Radiation Oncology Physics
Malatesta, T.
Landoni, V.
delle Canne, S.
Bufacchi, A.
Marmiroli, L.
Caspiani, O.
Bonanni, A.
Tortoreto, F.
Leone, M. V.
Capparella, R.
Fragomeni, R.
Begnozzi, L.
Dosimetric, mechanical, and geometric verification of conformal dynamic arc treatment
title Dosimetric, mechanical, and geometric verification of conformal dynamic arc treatment
title_full Dosimetric, mechanical, and geometric verification of conformal dynamic arc treatment
title_fullStr Dosimetric, mechanical, and geometric verification of conformal dynamic arc treatment
title_full_unstemmed Dosimetric, mechanical, and geometric verification of conformal dynamic arc treatment
title_short Dosimetric, mechanical, and geometric verification of conformal dynamic arc treatment
title_sort dosimetric, mechanical, and geometric verification of conformal dynamic arc treatment
topic Radiation Oncology Physics
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5724444/
https://www.ncbi.nlm.nih.gov/pubmed/12841789
http://dx.doi.org/10.1120/jacmp.v4i3.2515
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