Determination of the depth dose distribution of proton beam using PRESAGE™ dosimeter

L. Zhao, I. J. Das, Q. Zhao, A. Thomas, J. Adamovics, M. Oldman

Research output: Contribution to journalArticle

7 Scopus citations


PRESAGE™ dosimeter dosimeter has been proved useful for 3D dosimetry in conventional photon therapy and IMRT [1-5]. Our objective is to examine the use of PRESAGE™ dosimeter for verification of depth dose distribution in proton beam therapy. Three PRESAGE™ samples were irradiated with a 79 MeV un-modulated proton beam. Percent depth dose profile measured from the PRESAGE™ dosimeter is compared with data obtained in a water phantom using a parallel plate Advanced Markus chamber. The Bragg-peak position determined from the PRESAGE™ is within 2 mm compared to measurements in water. PRESAGE™ shows a highly linear response to proton dose. However, PRESAGE™ also reveals an underdosage around the Bragg peak position due to LET effects. Depth scaling factor and quenching correction factor need further investigation. Our initial result shows that PRESAGE™ has promising dosimetric characteristics that could be suitable for proton beam dosimetry.

Original languageEnglish (US)
Article number012035
Pages (from-to)160-163
Number of pages4
JournalJournal of Physics: Conference Series
StatePublished - 2010

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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