Dose Course 2018_Flipping book

TRS-483: formalism for relative dosimetry in small static

output factor determination in small static fields

f

D D

clin

f Q

f

Qw,

S

=

clin = 

clin

msr

,

cp

f

, Qmsr clin

msr

Qw,

msr

f

f

f

   

   

M M M M

clin M D M D clin clin Q f

clin

clin

Q

Qw,

=

clin

clin

f

f

msr

msr

Q

Qw,

Q

msr

msr

msr

f

clin

Small field detector-specific correction factor

Q

f

f

, ,

k

=

clin

clin

msr

Q Q f

Clin: any clinical fiel

clin

msr

msr

Q

msr

Ref: msr field

In TRS-483: Correction factors tabulated for equivalent square msr fields defined by MLC or cones and for Cyberknife Tomotherapy, GammaKnife and 6 MV, 10 MV, WFF and FFF linacs.