Abstract:
:The purpose of this study was to establish a dose estimation tool with Monte Carlo (MC) simulations. A 5-y-old paediatric anthropomorphic phantom was computed tomography (CT) scanned to create a voxelised phantom and used as an input for the abdominal cone-beam CT in a BEAMnrc/EGSnrc MC system. An X-ray tube model of the Varian On-Board Imager((R)) was built in the MC system. To validate the model, the absorbed doses at each organ location for standard-dose and low-dose modes were measured in the physical phantom with MOSFET detectors; effective doses were also calculated. In the results, the MC simulations were comparable to the MOSFET measurements. This voxelised phantom approach could produce a more accurate dose estimation than the stylised phantom method. This model can be easily applied to multi-detector CT dosimetry.
journal_name
Radiat Prot Dosimetryjournal_title
Radiation protection dosimetryauthors
Kim S,Yoshizumi TT,Toncheva G,Frush DP,Yin FFdoi
10.1093/rpd/ncp257subject
Has Abstractpub_date
2010-03-01 00:00:00pages
257-63issue
3eissn
0144-8420issn
1742-3406pii
ncp257journal_volume
138pub_type
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