Mathematical calibration is an increasingly popular technique among laboratories with a whole- or partial-body counters. A mathematical calibration employing a voxel phantom and Monte Carlo radiation transport code simulations has many benefits and can overcome many limitations of detector efficiency calibration using physical anthropomorphic phantoms. This publication tries to identify key factors for detector modelling. The influence of such parameters depends on energy and thus is studied in the gamma energy range of detectable radionuclides, i.e. from 15 keV to 1.5 MeV.
- MeSH
- antropometrie MeSH
- celotělové počítání metody MeSH
- dávka záření * MeSH
- fantomy radiodiagnostické * MeSH
- kalibrace MeSH
- lidé MeSH
- metoda Monte Carlo MeSH
- počítačová simulace MeSH
- radiační ochrana metody MeSH
- radiometrie přístrojové vybavení metody MeSH
- radionuklidy MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
A simple hemispherical phantom has been designed and prepared for the EURADOS intercomparison exercise on (241)Am activity determination in the skull (2011-13). The phantom consists of three parts that substitute bone and soft tissues. (241)Am is deposited on the surfaces of the bone-substituting part. The design and assumed composition of phantom parts are discussed. A preparation of the voxel representation of the phantom is described. The spectrum of a real measurement of the physical phantom agrees well with the simulation. The physical phantom, and its voxel representation, is provided to the participants of the intercomparison exercise.
- MeSH
- americium analýza MeSH
- design vybavení MeSH
- fantomy radiodiagnostické MeSH
- fotony MeSH
- kalibrace MeSH
- kosti a kostní tkáň MeSH
- lebka účinky záření MeSH
- metoda Monte Carlo MeSH
- monitorování radiace metody MeSH
- počítačová rentgenová tomografie MeSH
- polyurethany chemie MeSH
- radiometrie metody normy MeSH
- reprodukovatelnost výsledků MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Geografické názvy
- Česká republika MeSH
The paper deals with the physical skull phantoms Bundesinstitut fuer Strahlenschutz and BPAM-001, which are used in order to calibrate in vivo detection systems for estimation of (241)Am activity in the skeleton. Their voxel models were made and used in the Monte Carlo simulations. The results of the simulation were compared with measurements and reasonable agreement was observed. Several aspects such as materials and source distributions used in the models were discussed.
- MeSH
- aktinoidy analýza MeSH
- fantomy radiodiagnostické normy MeSH
- kalibrace MeSH
- kosti a kostní tkáň metabolismus MeSH
- lebka MeSH
- lidé MeSH
- metoda Monte Carlo MeSH
- počítačová rentgenová tomografie metody MeSH
- počítačová simulace MeSH
- počítačové zpracování obrazu MeSH
- radiometrie přístrojové vybavení metody MeSH
- software MeSH
- teoretické modely MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
