Estimation of absorbed doses from paediatric cone-beam CT scans: MOSFET measurements and Monte Carlo simulations.

Journal Article (Journal Article)

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.

Full Text

Duke Authors

Cited Authors

  • Kim, S; Yoshizumi, TT; Toncheva, G; Frush, DP; Yin, F-F

Published Date

  • March 2010

Published In

Volume / Issue

  • 138 / 3

Start / End Page

  • 257 - 263

PubMed ID

  • 19889800

Electronic International Standard Serial Number (EISSN)

  • 1742-3406

Digital Object Identifier (DOI)

  • 10.1093/rpd/ncp257


  • eng

Conference Location

  • England