From: Assessment of IMPT versus VMAT plans using different uncertainty scenarios for prostate cancer
Nominal Plans | Uncertainty Plans | ||||||
---|---|---|---|---|---|---|---|
Cohort | VMATorig | IMPTRO3 | IMPTRO5 | VMAT3mm | IMPT3%/3 mm | VMAT5mm | IMPT3%/5 mm |
CTV Dmax | |||||||
Mean | 110.0 ± 1.7 | 108.0 ± 1.6 | 109.7 ± 1.8 | 110.0 ± 1.7 | 106.8 ± 1.1 | 110.0 ± 1.8 | 108.7 ± 1.9 |
Range | 107.4–113.8 | 104.5–110.6 | 106.8–113.8 | 106.7–114.5 | 104.2–110.0 | 106.7–114.4 | 104.0–114.6 |
Failure rate of uncertainty plans (%) | 0.0 | 0.0 | 0.0 | 0.0 | |||
CTV homogeneity index (HI) | |||||||
Mean | 0.05 ± 0.01 | 0.03 ± 0.01 | 0.05 ± 0.01 | 0.05 ± 0.01 | 0.06 ± 0.02 | 0.07 ± 0.03 | 0.09 ± 0.04 |
Range | 0.03–0.08 | 0.02–0.04 | 0.03–0.06 | 0.03–0.10 | 0.01–0.10 | 0.04–0.25 | 0.04–0.26 |
CTV conformity index (CI) | |||||||
Mean | 1.8 ± 0.1 | 1.5 ± 0.1 | 1.7 ± 0.2 | 1.8 ± 0.1 | 1.2 ± 0.1 | 1.8 ± 0.1 | 1.5 ± 0.2 |
Range | 1.6–2.0 | 1.2–1.7 | 1.4–2.0 | 1.6–2.0 | 0.8–1.6 | 1.6–2.0 | 1.0–2.0 |
CTV V95% | |||||||
Mean | 99.9 ± 0.1 | 100.0 ± 0.0 | 100.0 ± 0.0 | 99.9 ± 0.2 | 99.6 ± 0.4 | 99.7 ± 0.7 | 98.8 ± 1.2 |
Range | 99.7–100.0 | 100.0 | 100.0 | 98.3–100.0 | 97.5–100.0 | 94.5–100 | 95.4–100 |
Failure rate of uncertainty plans (%) | 0.0 | 0.0 | 0.0 | 0.0 | |||
Anorectum (V4000cGy) | |||||||
Mean | 20.4 ± 6.3 | 13.8 ± 4.4 | 15.3 ± 5.3 | 20.7 ± 8.2 | 14.0 ± 6.2 | 21.2 ± 10.2 | 15.8 ± 9.0 |
Range | 10.4–32.7 | 6.6–22.8 | 7.7–27.9 | 5.00–45.7 | 3.0–32.0 | 2.1–53.7 | 1.7–42.5 |
Failure rate of uncertainty plans (%) | 4.6 | 0.0 | 8.7 | 3.1 | |||
Anorectum (V6500cGy) | |||||||
Mean | 7.0 ± 2.9 | 5.1 ± 2.5 | 6.4 ± 3.5 | 7.4 ± 4.9 | 5.5 ± 4.0 | 8.1 ± 6.5 | 7.4 ± 6.4 |
Range | 2.8–14.4 | 1.8–9.3 | 2.4–15.3 | 0.1–22.8 | 0.1–17.0 | 0.0–28.9 | 0.0–27.1 |
Failure rate of uncertainty plans (%) | 5.1 | 0.3 | 10.9 | 8.6 | |||
Anorectum (V8000cGy) | |||||||
Mean | 0.9 ± 1.1 | 0.5 ± 0.8 | 1.1 ± 1.8 | 1.4 ± 2.3 | 0.8 ± 1.5 | 1.8 ± 3.0 | 1.9 ± 3.4 |
Range | 0.0–3.5 | 0.0–2.6 | 0.0–7.7 | 0.0–12.3 | 0.0–7.1 | 0.0–12.4 | 0.0–17.7 |
Failure rate of uncertainty plans (%) | 0.6 | 0 | 3.0 | 5.8 | |||
Bladder (V4000cGy) | |||||||
Mean | 21.9 ± 11.4 | 13.7 ± 7.3 | 15.3 ± 7.7 | 21.9 ± 11.9 | 13.5 ± 7.8 | 21.9 ± 12.8 | 15.1 ± 9.3 |
Range | 3.4–44.5 | 1.8–31.5 | 2.2–31.1 | 2.3–53.4 | 1.0–42.0 | 1.7–60.9 | 0.9–46.0 |
Failure rate of uncertainty plans (%) | 1.1 | 0.0 | 1.7 | 0.0 | |||
Bladder (V6500cGy) | |||||||
Mean | 8.5 ± 4.7 | 6.0 ± 3.5 | 7.4 ± 3.9 | 8.6 ± 5.4 | 5.9 ± 4.4 | 8.7 ± 6.5 | 7.6 ± 5.9 |
Range | 1.2–19.7 | 0.6–14.3 | 0.8–15.2 | 0.6–28.4 | 0.2–25.1 | 0.3–34.7 | 0.1–30.7 |
Failure rate of uncertainty plans (%) | 1.1 | 0.3 | 2.3 | 0.9 | |||
Bladder (V8000cGy) | |||||||
Mean | 2.5 ± 2.3 | 0.6 ± 0.9 | 1.3 ± 1.3 | 2.7 ± 2.9 | 0.6 ± 1.2 | 2.9 ± 3.6 | 1.4 ± 2.1 |
Range | 0.0–8.3 | 0.0–3.2 | 0.0–4.3 | 0.0–15.6 | 0.0–9.39 | 0.0–20.9 | 0.0–11.7 |
Failure rate of uncertainty plans (%) | 2.4 | 0.0 | 4.8 | 0.6 |