Table 3.
Dose differences for phantom study split in comparison for titanium and plastic applicator for organ at risk and target surrogate. A negative difference means the value was higher for TG-43 than for Acuros-based treatment plans
| Absorbed dose | EQD2 (α/β = 3 resp. 10 Gy) | |||||||
|---|---|---|---|---|---|---|---|---|
| TG-43 (Gy) |
Acuros (Gy) |
relΔ (%) |
TG-43 (GyISO) |
Acuros (GyISO) |
relΔ (%) |
|||
| OAR | D0.1cm3 | Titanium | 5.32 | 5.22 | –1.88 | 8.85 | 8.58 | –3.06 |
| Plastic | 4.95 | 4.92 | –0.61 | 7.87 | 7.79 | –0.98 | ||
| D2cm3 | Titanium | 4.43 | 4.34 | –2.03 | 6.58 | 6.37 | –3.22 | |
| Plastic | 4.23 | 4.20 | –0.71 | 6.12 | 6.05 | –1.12 | ||
| Target | D50 | Titanium | 11.43 | 11.28 | –1.24 | 20.40 | 20.02 | –1.89 |
| Plastic | 11.25 | 11.24 | –0.02 | 19.91 | 19.90 | –0.04 | ||
| D90 | Titanium | 7.54 | 7.44 | –1.24 | 11.02 | 10.82 | –1.76 | |
| Plastic | 7.51 | 7.47 | –0.51 | 10.96 | 10.88 | –0.73 | ||
| D98 | Titanium | 6.79 | 6.71 | –1.11 | 9.49 | 9.35 | –1.56 | |
| Plastic | 6.77 | 6.77 | –0.05 | 9.47 | 9.46 | –0.07 | ||
| V100 | (%) | (%) | (%) | |||||
| Titanium | 96.37 | 95.35 | –1.02 | |||||
| Plastic | 96.14 | 95.75 | –0.39 | |||||
EQD2 – equivalent dose at 2 Gy, α/β – alpha/beta ratio, D0.1cm3, D2cm3 – minimum dose to the most exposed 0.1 cm3, 2 cm3, OAR – organs at risk, D50, D90, D98 – the minimum dose to 50%, 90%, 98% of the target, V100 – volume of the anatomic volume receiving 100%, of the prescribed dose