309 / 1674
Comparison of MammoSite and Interstitial Brachytherapy,
example
24 patients treated with MammoSite compared to 17 patients treated with IB
MammoSite
Interstitial Brachytherapy
Dose/frac/days
34/10/5
36.4/7/5
PTV cc
109.6
63.4
V90
96%
76%
V100
88%
70%
V150
27%
26%
V200
3%
9%
Dose homogeneity
0.70
0.63
Dmax skin
97%
45%
Dmax lung
66%
54%
Dmax heart
27%
31%
V90 (% of PTV receiving ≥90% of prescribed dose)
Major et al, R&O 2006
A little more
dose inhomoge.
Less skin and
lung dose