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Electron contamination modeling and reduction in a 1 T open bore inline MRI-linac system

Journal Article


Abstract

  • A potential side effect of inline MRI-linac systems is electron contamination focusing causing a high skin dose. In this work, the authors reexamine this prediction for an open bore 1 T MRI system being constructed for the Australian MRI-Linac Program. The efficiency of an electron contamination deflector (ECD) in purging electron contamination from the linac head is modeled, as well as the impact of a helium gas region between the deflector and phantom surface for lowering the amount of air-generated contamination.

Authors

  •   Oborn, Brad M.
  •   Kolling, Stefan (external author)
  •   Metcalfe, Peter E.
  •   Crozier, Stuart (external author)
  •   Litzenberg, D W. (external author)
  •   Keall, Paul J. (external author)

Publication Date

  • 2014

Citation

  • Oborn, B., Kolling, S., Metcalfe, P. E., Crozier, S., Litzenberg, D. W. & Keall, P. (2014). Electron contamination modeling and reduction in a 1 T open bore inline MRI-linac system. Medical Physics, 41 (5), 051708-1-051708-15.

Scopus Eid

  • 2-s2.0-84904865536

Ro Metadata Url

  • http://ro.uow.edu.au/eispapers/2250

Has Global Citation Frequency

Start Page

  • 051708-1

End Page

  • 051708-15

Volume

  • 41

Issue

  • 5

Place Of Publication

  • United States

Abstract

  • A potential side effect of inline MRI-linac systems is electron contamination focusing causing a high skin dose. In this work, the authors reexamine this prediction for an open bore 1 T MRI system being constructed for the Australian MRI-Linac Program. The efficiency of an electron contamination deflector (ECD) in purging electron contamination from the linac head is modeled, as well as the impact of a helium gas region between the deflector and phantom surface for lowering the amount of air-generated contamination.

Authors

  •   Oborn, Brad M.
  •   Kolling, Stefan (external author)
  •   Metcalfe, Peter E.
  •   Crozier, Stuart (external author)
  •   Litzenberg, D W. (external author)
  •   Keall, Paul J. (external author)

Publication Date

  • 2014

Citation

  • Oborn, B., Kolling, S., Metcalfe, P. E., Crozier, S., Litzenberg, D. W. & Keall, P. (2014). Electron contamination modeling and reduction in a 1 T open bore inline MRI-linac system. Medical Physics, 41 (5), 051708-1-051708-15.

Scopus Eid

  • 2-s2.0-84904865536

Ro Metadata Url

  • http://ro.uow.edu.au/eispapers/2250

Has Global Citation Frequency

Start Page

  • 051708-1

End Page

  • 051708-15

Volume

  • 41

Issue

  • 5

Place Of Publication

  • United States