The pilot study of on-site end-to-end IMRT audit in radiotherapy in the Czech Republic with the head anthropomorphic phantom

Autor: Irena Koniarová, Vladimir Dufek, Ivana Horakova
Rok vydání: 2016
Předmět:
Zdroj: Physica Medica. 32:304
ISSN: 1120-1797
DOI: 10.1016/j.ejmp.2016.07.157
Popis: Introduction In the Czech Republic, intensity modulated radiation therapy (IMRT) became a standard type of treatment. Each department has established the quality controls for IMRT plans but these controls can miss some aspects because they are not “end-to-end” tests. National Radiation Protection Institute (NRPI) has developed a tool for comprehensive verification of IMRT head plans. Purpose The aim of this work was to propose and test on-site audit that would verify the whole process of radiotherapy of head tumors. Materials and methods Anthropomorphic head phantom including bones, soft tissues, and cavities was adjusted for the purposes of the audit. Apertures for chambers were drilled and volumes were marked out in the phantom to distinguish PTV and OARs unambiguously. Two treatment sites can be verified separately (nasopharynx and glioblastoma). Verification of point doses with ionisation chambers and planar doses with films in PTV and organ at risk can be performed as well as planning process control. Results Methodology has been tested within the pilot study at 3 departments with photon beams (including rotational techniques) and one department with proton beams. The audit can be performed globally. The results might show interesting intercomparison among departments covering dosimetry part of treatment as well as differences in contouring standards, planning standards, plan evaluation parameters, patient set-up accuracy. Conclusion NRPI has developed and tested methodology of “end-to-end” audit for head and brain IMRT treatment. Disclosure This work has been supported by the project No. TB04SUJB001. Authors have no potential conflict of interest to disclose.
Databáze: OpenAIRE
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