Articles producció científica> Ciències Mèdiques Bàsiques

IAEA methodology for on-site end-to-end IMRT/VMAT audits: an international pilot study

  • Datos identificativos

    Identificador: imarina:9334303
    Autores:
    Kazantsev, PLechner, WGershkevitsh, EClark, CHVenencia, DVan Dyk, JWesolowska, PHernandez, VJornet, NTomsej, MBokulic, TIzewska, J
    Resumen:
    Background: The IAEA has developed and tested an on-site, end-to-end IMRT/VMAT dosimetry audit methodology for head and neck cases using an anthropomorphic phantom. The audit methodology is described, and the results of the international pilot testing are presented. Material and methods: The audit utilizes a specially designed, commercially available anthropomorphic phantom capable of accommodating a small volume ion chamber (IC) in four locations (three in planning target volumes (PTVs) and one in an organ at risk (OAR)) and a Gafchromic film in a coronal plane for the absorbed dose to water and two-dimensional dose distribution measurements, respectively. The audit consists of a pre-visit and on-site phases. The pre-visit phase is carried out remotely and includes a treatment planning task and a set of computational exercises. The on-site phase aims at comparing the treatment planning system (TPS) calculations with measurements in the anthropomorphic phantom following an end-to-end approach. Two main aspects were tested in the pilot study: feasibility of the planning constraints and the accuracy of IC and film results in comparison with TPS calculations. Treatment plan quality was scored from 0 to 100. Results: Forty-two treatment plans were submitted by 14 institutions from 10 countries, with 79% of them having a plan quality score over 90. Seventeen sets of IC measurement results were collected, and the average measured to calculated dose ratio was 0.988 +/- 0.016 for PTVs and 1.020 +/- 0.029 for OAR. For 13 film measurement results, the average gamma passing rate was 94.1% using criteria of 3%/3 mm, 20% threshold and global gamma. Conclusions: The audit methodology was proved to be feasible and ready to be adopted by national dosimetry audit networks for local impl
  • Otros:

    Autor según el artículo: Kazantsev, P; Lechner, W; Gershkevitsh, E; Clark, CH; Venencia, D; Van Dyk, J; Wesolowska, P; Hernandez, V; Jornet, N; Tomsej, M; Bokulic, T; Izewska, J
    Departamento: Ciències Mèdiques Bàsiques
    Autor/es de la URV: Hernandez Masgrau, Victor
    Palabras clave: System Radiotherapy, intensity-modulated Radiotherapy planning, computer-assisted Radiotherapy dosage Radiotherapy Radiometry Quality-assurance Quality assurance, health care Qa Pilot projects Phantoms, imaging Multicenter Medical audit International agencies Imrt Humans Head and neck neoplasms Head Feasibility studies Dosimetry audit Criteria
    Resumen: Background: The IAEA has developed and tested an on-site, end-to-end IMRT/VMAT dosimetry audit methodology for head and neck cases using an anthropomorphic phantom. The audit methodology is described, and the results of the international pilot testing are presented. Material and methods: The audit utilizes a specially designed, commercially available anthropomorphic phantom capable of accommodating a small volume ion chamber (IC) in four locations (three in planning target volumes (PTVs) and one in an organ at risk (OAR)) and a Gafchromic film in a coronal plane for the absorbed dose to water and two-dimensional dose distribution measurements, respectively. The audit consists of a pre-visit and on-site phases. The pre-visit phase is carried out remotely and includes a treatment planning task and a set of computational exercises. The on-site phase aims at comparing the treatment planning system (TPS) calculations with measurements in the anthropomorphic phantom following an end-to-end approach. Two main aspects were tested in the pilot study: feasibility of the planning constraints and the accuracy of IC and film results in comparison with TPS calculations. Treatment plan quality was scored from 0 to 100. Results: Forty-two treatment plans were submitted by 14 institutions from 10 countries, with 79% of them having a plan quality score over 90. Seventeen sets of IC measurement results were collected, and the average measured to calculated dose ratio was 0.988 +/- 0.016 for PTVs and 1.020 +/- 0.029 for OAR. For 13 film measurement results, the average gamma passing rate was 94.1% using criteria of 3%/3 mm, 20% threshold and global gamma. Conclusions: The audit methodology was proved to be feasible and ready to be adopted by national dosimetry audit networks for local implementation.
    Áreas temáticas: Radiology, nuclear medicine and imaging Oncology Medicine (miscellaneous) Medicina ii Medicina i Hematology General medicine Ciências biológicas iii Biotecnología
    Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/
    Direcció de correo del autor: victor.hernandez@urv.cat
    Identificador del autor: 0000-0003-3770-8486
    Fecha de alta del registro: 2024-06-28
    Versión del articulo depositado: info:eu-repo/semantics/publishedVersion
    Enlace a la fuente original: https://www.tandfonline.com/doi/full/10.1080/0284186X.2019.1685128
    Referencia al articulo segun fuente origial: Acta Oncologica. 59 (2): 141-148
    Referencia de l'ítem segons les normes APA: Kazantsev, P; Lechner, W; Gershkevitsh, E; Clark, CH; Venencia, D; Van Dyk, J; Wesolowska, P; Hernandez, V; Jornet, N; Tomsej, M; Bokulic, T; Izewska, (2020). IAEA methodology for on-site end-to-end IMRT/VMAT audits: an international pilot study. Acta Oncologica, 59(2), 141-148. DOI: 10.1080/0284186X.2019.1685128
    URL Documento de licencia: https://repositori.urv.cat/ca/proteccio-de-dades/
    DOI del artículo: 10.1080/0284186X.2019.1685128
    Entidad: Universitat Rovira i Virgili
    Año de publicación de la revista: 2020
    Tipo de publicación: Journal Publications
  • Palabras clave:

    Hematology,Medicine (Miscellaneous),Oncology,Radiology, Nuclear Medicine and Imaging
    System
    Radiotherapy, intensity-modulated
    Radiotherapy planning, computer-assisted
    Radiotherapy dosage
    Radiotherapy
    Radiometry
    Quality-assurance
    Quality assurance, health care
    Qa
    Pilot projects
    Phantoms, imaging
    Multicenter
    Medical audit
    International agencies
    Imrt
    Humans
    Head and neck neoplasms
    Head
    Feasibility studies
    Dosimetry audit
    Criteria
    Radiology, nuclear medicine and imaging
    Oncology
    Medicine (miscellaneous)
    Medicina ii
    Medicina i
    Hematology
    General medicine
    Ciências biológicas iii
    Biotecnología
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