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Monte Carlo Neutron Photon Treatment Planning Calculations

Modelling from CT Scans with Variable Voxel Size
  • S. A. Wallace
  • B. J. Allen
  • J. N. Mathur

Abstract

Routine treatment planning using the Monte Carlo technique is becoming ever more possible with the development of increasingly powerful computational hardware. This is applicable not just within the field of Boron Neutron Capture Therapy, but in radiation therapy in general. In the clinical situation, treatment plans must take into account, amongst other factors, the individual patient geometry. This is typically done by incorporating patient CT or MRI information and using surface reconstruction techniques or with small rectilinear volume elements termed “voxels”. The voxel based method typically suffers from being inherently computationally intensive, however this problem may be overcome by introducing a variable voxel size. Regions of interest may be specified where higher resolution anatomical structure and dose calculations can be achieved. Surrounding regions may be modelled with lesser resolution, thereby reducing the overall computational effort required. Applying the Los Alamos Monte Carlo code MCNP, version 3a, with the use of supercomputing hardware enables calculations to be performed in under 10hrs to a resolution of a few millimetres and statistical accuracy of less than 5%. Results are presented for human head and whole body phantoms with incident neutron spectrum and collimator geometry being that of the JRC/ECN Petten epithermal neutron beam.

Keywords

Dose Distribution Liver Region Head Model Boron Neutron Capture Therapy Neutron Dose 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1996

Authors and Affiliations

  • S. A. Wallace
    • 1
  • B. J. Allen
    • 1
    • 2
  • J. N. Mathur
    • 1
  1. 1.Physics DepartmentUniversity of WollongongWollongongAustralia
  2. 2.St George Cancer Care CentreKogarahAustralia

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