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How to express deviations?
Calculated and measured dose distributions can be compared
according to
B – present beam, R – Ref beam
1)
to the
local dose
value
2) to the dose at a
specific point inside the beam
under consideration
this is proposed in the IAEA TRS-1583
3) to the
dose in a reference field
d
%(
i
,
B
)
=
100
×
D
calc
(
i
,
B
)
-
D
meas
(
i
,
B
)
(
)
/
D
meas
(
i
,
B
)
(
)
) ,
(
/) ,
(
) ,(
100 ) ,%(
R ref
DR ref
D
Bi
D
Bi d
meas
meas
calc
−
=
Dublin 2018
(
)
) ,
(
/)
,
(
) ,(
100 )
,%(
B ref
DB ref
DBi
D
Bi
d
meas
meas
calc
−
=
Local
Global
Global and output normalised
D
f
º
D
f
/
M
f
®
f
Î
calc
,
meas
éë
ù
û