Calculations of dose distributions in the lungs of a rat model irradiated in the thermal column of the TRIGA reactor in Pavia

N. Protti, S. Bortolussi, S. Stella, M. A. Gadan, A. De Bari, F. Ballarini, P. Bruschi, C. Ferrari, A. M. Clerici, C. Zonta, J. G. Bakeine, P. Dionigi, A. Zonta, S. Altieri

Research output: Contribution to journalArticlepeer-review

Abstract

To test the possibility to apply boron neutron capture therapy (BNCT) to lung tumors, some rats are planned to be irradiated in the thermal column of the TRIGA reactor of the University of Pavia. Before the irradiation, lung metastases will be induced in BDIX rats, which will be subsequently infused with boronophenylalanine (BPA). During the irradiation, the rats will be positioned in a box designed to shield the whole animal except the thorax area. In order to optimize the irradiation set-up and to design a suitable shielding box, a set of calculations were performed with the MCNP Monte Carlo transport code. A rat model was constructed using the MCNP geometry capabilities and was positioned in a box with walls filled with lithium carbonate. A window was opened in front of the lung region. Different shapes of the holder and of the window were tested and analyzed in terms of the dose distribution obtained in the lungs and of the dose absorbed by the radiosensitive organs in the rat. The best configuration of the holder ensures an almost uniform thermal neutron flux inside the lungs (Φmaxmin=1.5), an irradiation time about 10 min long, to deliver at least 40 Gyw to the tumor, a mean lung dose of 5.9±0.4 Gyw, and doses absorbed by all the other healthy tissues below the tolerance limits.

Original languageEnglish
JournalApplied Radiation and Isotopes
Volume67
Issue number7-8 SUPPL.
DOIs
Publication statusPublished - Jul 2009

Keywords

  • BNCT
  • Lung metastases
  • MCNP calculations
  • Rat irradiation

ASJC Scopus subject areas

  • Radiation

Fingerprint Dive into the research topics of 'Calculations of dose distributions in the lungs of a rat model irradiated in the thermal column of the TRIGA reactor in Pavia'. Together they form a unique fingerprint.

Cite this