1354-1355 / 2239
Including monitor signal
M
b
caused by backscatter as a function of collimator aperture, the
formalism is:
Dose per MU formalisms:
model-based dose calculations
(
)
(
)
( )
(
)
1
0
0
0
; , ;
; , ;
1
D A x y z D A x y
b A
M
z
M
Ψ
Ψ
−
=
⋅ +
calibration
factor
(
)
[
]
,
,
;
Ψ
M z y x AD
Note: Different implementations in common TPSs described in the next lecture)
(
)
( )
(
)
[
]
calc
1
ref
o
ref
ref
ref
ref
meas
ref
ref
ref
ref
o
o
1
,
,
;
−
+ ⋅Ψ
=
Ab
z y x AD M