Three dimensional dose distribution comparison of simple and complex acquisition trajectories in dedicated breast CT - A Monte Carlo study


Journal Article

The purpose of this study was to characterize the three dimensional (3D) x-ray dose distributions in a target scanned with different acquisition trajectories for dedicated breast CT imaging. Monte Carlo simulations were used to evaluate two acquisition trajectories: circular azimuthal (no tilt) and complex sinusoidal (saddle) orbit with ±15° tilts around a pendant breast. Simulations were performed with tungsten (W) and cerium (Ce) filtration of a W-anode source; the simulated source flux was normalized to the measured exposure of a clinically used W-anode source. A water filled cylindrical phantom, was divided into 1cc voxels, and each voxel was set to track the cumulative energy deposited. Energy deposited per voxel was converted to dose, yielding the 3D distributed dose volumes. Results indicate that the mean absorbed dose at the isocenter of a volume for the un-tilted acquisition is ∼10% higher than that from a saddle scan, regardless of filtration used. © 2014 Springer International Publishing.

Full Text

Duke Authors

Cited Authors

  • Shah, JP; Mann, SD; McKinley, RL; Tornai, MP

Published Date

  • January 1, 2014

Published In

Volume / Issue

  • 8539 LNCS /

Start / End Page

  • 187 - 194

Electronic International Standard Serial Number (EISSN)

  • 1611-3349

International Standard Serial Number (ISSN)

  • 0302-9743

Digital Object Identifier (DOI)

  • 10.1007/978-3-319-07887-8_27

Citation Source

  • Scopus