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5.2
Observations
Equations solved:
Primary beam photon fluence explicitly raytraced through the patient
•
imply the same dependence on
― multisource beam model
― patient data (HU lookup)
as pencil kernel, point kernel (“superposition”) and Monte Carlo approaches
•
used to delimit strike dose artefacts from angular discretization
•
secondary particle transport decoupled and can be done in common for all
field segments to reduce computation time for (many field…) rotational
therapy
Converges to the true solution (except for neglected interactions) with finer
discretizations
One commercial implementation (Acuros™ in Varian Eclipse, EB and brachy versions)
*
*
Failla
etal Acuros XB advanced dose calculation for the Eclipse treatment planning system.
Varian white paper
*
Gifford
etal
, 2006. Phys Med Biol. 51(9):2253-65.
*
Gifford
etal
, 2008. Med Phys. 35(6):2279-85.
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