Table 3. Corresponding depths to the irradiated σ/ctc-ratios and beam sizes for an exemplary tumor in 5–8.5 cm depth.
| σ/ctc-ratio | 0.053 | 0.11 | 0.17 | 0.23 | 0.31 | 0.49 |
| Beam size σ [μm] | 95 | 199 | 306 | 411 | 561 | 883 |
| Depth d [cm] | 0 | 1.5 | 2.0 | 2.5 | 3.4 | 5.0 |
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