We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
External exposure of deciduous tooth enamel to photons: dose conversion coefficients for standard radiation fields.
- Authors
A. Ulanovsky; A. Wieser
- Abstract
Abstract  Dose conversion coefficients for teeth of children were computed for external photon sources by means of Monte Carlo methods using a modified MIRD-type mathematical phantom of a 5-year-old child. The tooth region is separated into eight smaller regions that represent incisors, canines, first and second molars. Each of these sub-regions is separated into enamel and dentin parts. Dose conversion coefficients were computed as ratio of absorbed dose in the enamel and air kerma. They are given for unidirectional (AP, PA, RLAT, LLAT), rotational (ROT) and isotropic (ISO) photon sources in the energy range from 10 keV to 10 MeV. All computations were performed with the MCNP4 code including coupled electronâphoton transport. The computed coefficients demonstrate a significant non-linearity versus photon energy, which is more pronounced than that observed for adult phantoms. Due to this non-linearity, use of the EPR-measured doses in human teeth requires information on the incident photon fluence spectra. The data presented can be used for assessment of public exposure.
- Subjects
PHOTONS; DENTAL enamel; MONTE Carlo method; NUMERICAL analysis
- Publication
Radiation & Environmental Biophysics, 2007, Vol 46, Issue 4, p339
- ISSN
0301-634X
- Publication type
Article
- DOI
10.1007/s00411-007-0125-0