Dose verification of radiotherapy for lung cancer by using plastic scintillator dosimetry and a heterogeneous phantom

Wiviann Ottosson, C. F. Behrens, Claus E. Andersen

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    Abstract

    Bone, air passages, cavities, and lung are elements present in patients, but challenging to properly correct for in treatment planning dose calculations. Plastic scintillator detectors (PSDs) have proven to be well suited for dosimetry in non-reference conditions such as small fields. The objective of this study was to investigate the performance of a commercial treatment planning system (TPS) using a PSD and a specially designed thorax phantom with lung tumor inserts. 10 treatment plans of different complexity and phantom configurations were evaluated. Although the TPS agreed well with the measurements for the least complex tests, deviations of tumor dose > 4% were observed for some cases. This study underpins the dosimetric challenge in TPS calculations for clinically relevant heterogeneous geometries. The scintillator system, together with the special phantom, provides a promising tool for evaluation of complex radiotherapy dose calculations and delivery.
    Original languageEnglish
    Article number012022
    Book seriesJournal of Physics: Conference Series (Online)
    Volume573
    Issue number1
    Number of pages4
    ISSN1742-6596
    DOIs
    Publication statusPublished - 2015
    Event8th International Conference on 3D Radiation Dosimetry - Ystad, Sweden
    Duration: 4 Sep 20147 Sep 2014
    Conference number: 8

    Conference

    Conference8th International Conference on 3D Radiation Dosimetry
    Number8
    CountrySweden
    CityYstad
    Period04/09/201407/09/2014

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