ASMR

Metaphysics margins?

• Clinically used margin for breast: 0 mm! – Adapted from sim-technique - it’s just beam setup – Clearly not enough according to conventional margin ideas

• Clinically used margin for boost: 5 mm – Let’s see if that’s enough

Systematic

Random

Delineation

2.0 mm 1.5 mm

-

Setup

2.5 mm 2.0 mm 3.2 mm

Shape changes 2.0 mm

Total

3.2 mm

– Margin: 2.5 * 3.2 + 0.3 * 3.2 = 9 mm

Because of background dose