In-phantom dosimetry for BNCT with Fricke and normoxic-polymer gels

G. Gambarini, S. Agosteo, M. Carrara, S. Gay, M. Mariani, L. Pirola, E. Vanossi

Research output: Contribution to journalArticle

Abstract

Measurements of in-phantom dose distributions and images are important for Boron Neutron Capture Therapy treatment planning. The method for spatial determination of absorbed doses in thermal or epithermal neutron fields, based on Fricke-xylenol-orange-infused gel dosimeters in form of layers, has revealed to be very reliable, as gel layer dosimeters give the possibility of obtaining spatial dose distributions and measurements of each dose contribution in neutron fields, by means of a properly studied procedure. Quite recently, BNCT has been applied to treat liver metastases; in this work the results of in-phantom dosimetry for explanted liver in BNCT treatments are described. Moreover, polyacrylamide gel (PAG) dosimeters in which a polymerization process appears as a consequence of absorbed dose, have been recently tested, because of their characteristic absence of diffusion. In fact, due to the diffusion of ferric ions, Fricke-gel dosimeters require prompt analysis after exposure to avoid spatial information loss. In this work the preliminary results of a study about the reliability of polymer gel in BNCT dosimetry are also discussed. Gel layers have been irradiated in a phantom exposed in the thermal column of the TRIGA MARK II reactor (Pavia). The results obtained with the two kinds of gel dosimeter have been compared.

Original languageEnglish
Article number029
Pages (from-to)275-281
Number of pages7
JournalJournal of Physics: Conference Series
Volume41
Issue number1
DOIs
Publication statusPublished - May 1 2006

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Gambarini, G., Agosteo, S., Carrara, M., Gay, S., Mariani, M., Pirola, L., & Vanossi, E. (2006). In-phantom dosimetry for BNCT with Fricke and normoxic-polymer gels. Journal of Physics: Conference Series, 41(1), 275-281. [029]. https://doi.org/10.1088/1742-6596/41/1/029