Dose Course Book

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Isocentric

• c = 10 x 10 cm²

Dose per MU formalisms:

factor-based dose calculations

Reference normalisation conditions

Fixed SSD

c = 10 x 10 cm²

ref

Field size at isocenter

• d

ref

= 10 cm

• SSD = SAD - d

ref

Tissue phantom ratio

TPR(c,d)

ref

Field size at surface

d

ref

= 10 cm

SSD = SAD

Relative depth dose

RDD(s,d)

SAD

SSD=SAD

c

ref

(

)

[

]

MU cGy

M

d cD

SAD ;

,

ref

ref

(

)

[

]

MU cGy

M

d cD

SSD ;

,

ref

ref

d

ref

d

ref

c

ref