SBRT 2016

Typical Spot Sizes

Spot size in air or water, no pre- absorber Spot size in air and water, no pre-absorber

1

0.8

water

0.6

FWHM ± 1.0 cm

0.4

air

0.2

Spot size (1 sigma, cm)

34 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 0

(residual) Range (cm)

Courtesy by M. Engelsman