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BRT: Physics
Scatter / absorption
BRT
Depth Dose Curve: BRT
versus
EBRT
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
Ir-192
Yb-169
100 keV
80 keV
60 keV
50 keV
40 keV
Radial Dose Fucntion g(r)
1.0
1.2
1.4
1.6
1.8
2.0
2.2
2.4
2.6
2.8
3.0
100 keV
150 keV
200 keV
300 keV
400 keV
667 keV
20 keV
25 keV
30 keV
40 keV
50 keV
60 keV
70 keV
80 keV
90 keV
Dose Rate Normalized to 1.0 cm
0 2 4 6 8 10 12 14 16
0.0
0.1
0.2
0.3
30 keV
20 keV
Radial Distance (cm)
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
0.0
0.2
0.4
0.6
0.8
Radial Distance (cm)