CPB Budapest 2017

Depth Dose Curve: BRT versus EBRT

BRT: Physics Scatter / absorption

BRT

0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6

1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 0.0 0.2 0.4 0.6 0.8

20 keV 25 keV 30 keV 40 keV 50 keV 60 keV 70 keV 80 keV 90 keV

100 keV 150 keV 200 keV 300 keV 400 keV 667 keV

100 keV

60 keV

Yb-169

80 keV

Ir-192

50 keV

40 keV

0 2 4 6 8 10 12 14 16 0.0 0.1 0.2 0.3 30 keV 20 keV Radial Distance (cm)

Radial Dose Fucntion g(r)

Dose Rate Normalized to 1.0 cm

0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0

Radial Distance (cm)