Table 2.
Air cavity volume ratio.
| Balloon Physical Size | Fill Volume | Air Cavity Size (radius, in cm) | Volume Ratio |
|---|---|---|---|
| 0.25 | 0.04% | ||
| 34 cc | 0.50 | 0.36% | |
| 1.00 | 3.12% | ||
| 1.44 | 9.98% | ||
| 4‐5 cm MammoSite Balloon | |||
| 0.50 | 0.24% | ||
| 70 cc (S) | 1.00 | 2.04% | |
| 1.50 | 7.32% | ||
| 1.66 | 10.11% | ||
| 0.50 | 0.26% | ||
| 70 cc (L) | 1.00 | 2.21% | |
| 1.50 | 7.96% | ||
| 1.62 | 10.18% | ||
| 5‐6 cm MammoSite Balloon | |||
| 0.50 | 0.18% | ||
| 125 cc | 1.00 | 1.57% | |
| 1.50 | 5.59% | ||
| 2 | 9.97% | ||
Sixteen size combinations were used in this study. The volume ratio was calculated by dividing the air cavity volume by the PTV of each balloon size.