Medical Dosimetry
Volume 22, Issue 3 , Pages 207-211, Autumn 1997

Practical implementation of Enhanced Dynamic Wedge in the CadPlan treatment planning system

  • Anna Samuelsson

      Affiliations

    • Corresponding Author InformationReprint requests to: Anna Samuelsson, Department of Radiation Physies, Sahlgrenska University Hospital, S-41345 Göteborg, Sweden.
    • Department of Radiation Physics, Sahlgrenska University Hospital, S-41345 Göteborg, Sweden
    • ,
  • Karl-Axel Johansson

      Affiliations

    • Department of Radiation Physics, Sahlgrenska University Hospital, S-41345 Göteborg, Sweden
    • ,
  • Olof Mattsson

      Affiliations

    • Department of Radiation Physics, Sahlgrenska University Hospital, S-41345 Göteborg, Sweden
    • ,
  • Åsa Palm

      Affiliations

    • Department of Radiation Physics, Sahlgrenska University Hospital, S-41345 Göteborg, Sweden
    • ,
  • Harri Puurunen

      Affiliations

    • Varian-Dosetek Oy, Tietajantic 14, FIN-02130 Espoo, Finland
    • ,
  • Göran Sernbo

      Affiliations

    • Department of Radiation Physics, Sahlgrenska University Hospital, S-41345 Göteborg, Sweden

Abstract 

The Varian CadPlan algorithm for computation of relative dose distributions and monitor unit calculations for Enhanced Dynamic Wedge (EDW) fields is based on a combination of open field beam data and Segmented Treatment data Tables. Calculation of dose by the pencil beam convolution model uses scatter kernels and boundary kernels to create the distribution. The principles of the pencil beam convolution model is presented. Comparison of measured and calculated monitor units and relative dose distributions showed good agreement and the deviations are within international accepted tolerans. Test results indicate that the EDW model works satisfactorily for all energies and wedge angles.

Keywords:  Enhanced Dynamic Wedge, Dose Calculations

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PII: S0958-3947(97)00019-8

Medical Dosimetry
Volume 22, Issue 3 , Pages 207-211, Autumn 1997

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