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Conventional technique
o
Reproducibility
of
positioning/margins
required
to
account for set-up errors
o
Safety of anaesthesia for infants
treated in the prone position
o
Time taken for simulation and for
each daily treatment
o
Dose inhomogeneities in the target
volume, especially at the junctions and
along the length of the spinal axis
Van Dyk,
IJROBP 1977