1946-1947 / 2063
0.54
0.55
0.56
0.57
0.58
0.59
0 10 20 30 40 50 60
Loss in effective dose:
Acute to 60 min: 9%
5 min to 45 min: 6%
5 min to 30 min: 4%
2 Gy in 6
“
fields
”
Surviving Fraction
Time (min)
α
/
β
= 7.6 Gy
t
1/2
= 24.5 min
Prostate PC-3 cell survival in vitro
(Joiner et al, Wayne State University, Detroit)
Joiner et al, Med. Phys. 2010