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Dose through kernel integration - 1
Double exponential, tabulated over depth
The dose to the central axis
from a circular field with
radius
R
(and laterally
uniform energy fluence) can
be calculated as
D =
A Ahnesjö et al (1992)
Med Phys
19, 263-273
This is the PB dose calculation in Oncentra TPS (formely Helax-TMS)
In the same way, the dose to
the central axis from a
square field, with side
s
,
can be calculated by
employing the equivalent
circle with
R
=0.561
·
s
.