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Three Dimensional Dose Distribution Comparison of Simple and Complex Acquisition Trajectories in Dedicated Breast CT – A Monte Carlo Study

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Breast Imaging (IWDM 2014)

Part of the book series: Lecture Notes in Computer Science ((LNIP,volume 8539))

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Abstract

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 ±15o 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.

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Author information

Authors and Affiliations

  1. Department of Biomedical Engineering, Duke University, Durham, NC, 27705, USA

    Jainil P. Shah & Martin P. Tornai

  2. Medical Physics Graduate Program, Duke University Medical Center, Durham, NC, 27705, USA

    Steve D. Mann & Martin P. Tornai

  3. Multi Modality Imaging Lab, Duke University Medical Center, Durham, NC, 27710, USA

    Jainil P. Shah, Steve D. Mann & Martin P. Tornai

  4. ZumaTek, Inc., Research Triangle Park, USA, NC, 27709

    Randolph L. McKinley

Authors
  1. Jainil P. Shah
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  2. Steve D. Mann
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  3. Randolph L. McKinley
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  4. Martin P. Tornai
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Editor information

Editors and Affiliations

  1. Department of Intelligent Image Information, Gifu University Graduate School of Medicine, 1-1 Yanagido, 501-1194, Gifu, Gifu, Japan

    Hiroshi Fujita , Takeshi Hara  & Chisako Muramatsu ,  & 

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© 2014 Springer International Publishing Switzerland

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Shah, J.P., Mann, S.D., McKinley, R.L., Tornai, M.P. (2014). Three Dimensional Dose Distribution Comparison of Simple and Complex Acquisition Trajectories in Dedicated Breast CT – A Monte Carlo Study. In: Fujita, H., Hara, T., Muramatsu, C. (eds) Breast Imaging. IWDM 2014. Lecture Notes in Computer Science, vol 8539. Springer, Cham. https://doi.org/10.1007/978-3-319-07887-8_27

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  • DOI: https://doi.org/10.1007/978-3-319-07887-8_27

  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-07886-1

  • Online ISBN: 978-3-319-07887-8

  • eBook Packages: Computer ScienceComputer Science (R0)

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