ESTRO course Dose Modelling and Verification 2017

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 
       
ref ref ref ref Meas
1
ref ref ref ref 0 ref
Calc
0
0
; , ,
; , , 1
D A x y z M
D A x y z b M A 


 
 

 
 
 
   
   
0
0
1
0
; , , ; ;
1
; D A x y D A x y z z
M
A
M
b

 
  
Including monitor signal Mb caused by backscatter depending on collimator setting
   
0 0 ( ) 1
b M M M A b A M   
 
2
mon
back 2
coll
z
b A k F
z

 
3
2
Irradiated coll mon
collimator
area
cos
d F A
z z





Empirical factor from Sc measurements
M0
Mb Monitor chamber
mon z
coll z
 
presc
; at prescription point/conditions from field
i
i
i
D w
M
D A i
M


 
 
all fields
=1
;prescription conditions
;prescription conditions
i
i
i
i
D A
w
D A


Plan with dose weighted fields and prescribed dose Dpres:
Includes head scatter
and phantom scatter