AROI-ESTRO GYN Teaching Course

Mid Line Block

Normalization • For corner shielding, normalization at the isocentre • For Midline block- at a reference point

TPS modelling – Accurate modeling in TPS – Central axis is blocked

Central axis blocked

100

80

60

Dose(%)

40

20

0

-17

-7

3

13

Distance(cm)

Measured_crline Measured_inline

TPS_crline TPS_inline

Swamidas et al, ACPSEM 2009