Three dimensional dose verification of intensity modulated radiosurgery using polymer-gel dosimetry

Dong Joon Lee, Hyun Tai Chung, Moon Jun Sohn

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Polymer gel 3D dosimetry was used to confirm the accuracy of treatment plans produced by the treatment planning software and assess the dosimetric uncertainties of the radiosurgery procedures. The aim of this study is to investigate the 3D dose distribution of intensity-modulated radiosurgery(IMRS) treatment using polymer gel dosimeter for a selected radiosurgery case. A spherical glass flask(160mm-radius) filled with the polymer gel dosimeter was fixed with in the stereotactic head frame. And the intensity modulated radiosurgery(IMRS) treatment procedure was simulated to a selected preclinical concave shaped pituitary tumor closed to the optic pathway. Images of the gel dosimeter were acquired using a Simens 1.5T MR imager. The images transferred to a planning computer for which a data analysis and compare to dose distribution produced by planning software. Reasonable agreement was observed at medium and high doses (50%-80% isodose lines) although differences of up to 10% were observed at low doses (30% isodose line) between the treatment planning system calculation of relative dose distribution and the gel measured data. The gel dosimeter measured dose profiles of pre-planned beams agree within 3% with the beam profiles produced by planning software. The polymer gel dosimeter in combination with MR imaging has been shown to be a valuable devices for verifying three dimensional IMRS dose distribution.

Original languageEnglish
Title of host publicationWorld Congress on Medical Physics and Biomedical Engineering
Subtitle of host publicationRadiation Protection and Dosimetry, Biological Effects of Radiation
Pages482-483
Number of pages2
Edition3
DOIs
StatePublished - 1 Dec 2009
EventWorld Congress on Medical Physics and Biomedical Engineering: Radiation Protection and Dosimetry, Biological Effects of Radiation - Munich, Germany
Duration: 7 Sep 200912 Sep 2009

Publication series

NameIFMBE Proceedings
Number3
Volume25
ISSN (Print)1680-0737

Other

OtherWorld Congress on Medical Physics and Biomedical Engineering: Radiation Protection and Dosimetry, Biological Effects of Radiation
CountryGermany
CityMunich
Period7/09/0912/09/09

Keywords

  • 3D
  • Dose verification
  • Gel-dosimetry
  • IMRS

Cite this

Lee, D. J., Chung, H. T., & Sohn, M. J. (2009). Three dimensional dose verification of intensity modulated radiosurgery using polymer-gel dosimetry. In World Congress on Medical Physics and Biomedical Engineering: Radiation Protection and Dosimetry, Biological Effects of Radiation (3 ed., pp. 482-483). (IFMBE Proceedings; Vol. 25, No. 3). https://doi.org/10.1007/978-3-642-03902-7-136