BNCT dose calculation in irregular fields using the sector integration method
| Autor: | Herman Blaumann, Juan Longhino, O. A. Calzetta Larrieu, D.E Sanz |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Radiation
Photon Materials science Field (physics) Phantoms Imaging Equivalent dose Radiotherapy Planning Computer-Assisted Physics::Medical Physics Argentina Boron Neutron Capture Therapy Imaging phantom Computational physics Neutron capture Nuclear magnetic resonance Neoplasms Electromagnetic shielding Humans Neutron Relative Biological Effectiveness Beam (structure) |
| Zdroj: | Applied Radiation and Isotopes. 61:835-840 |
| ISSN: | 0969-8043 |
| DOI: | 10.1016/j.apradiso.2004.05.037 |
| Popis: | Irregular fields for boron neutron capture therapy (BNCT) have been already proposed to spare normal tissue in the treatment of superficial tumors. This added dependence would require custom measurements and/or to have a secondary calculation system. As a first step, we implemented the sector-integration method for irregular field calculation in a homogeneous medium and on the central beam axis . The dosimetric responses (fast neutron and photon dose and thermal neutron flux), are calculated by sector integrating the measured responses of circular fields over the field boundary. The measurements were carried out at our BNCT facility, the RA-6 reactor (Argentina). The input data were dosimetric responses for circular fields measured at different depths in a water phantom using ionisation and activation techniques. Circular fields were formed by shielding the beam with two plates: borated polyethilene plus lead. As a test, the dosimetric responses of a 7×4 cm2 rectangular field, were measured and compared to calculations, yielding differences less than 3% in equivalent dose at any depth indicating that the tool is suitable for redundant calculations. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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