Skip to main content

Table 2 The dose-volume parameters of accumulated dose

From: Adaptive planning based on single beam optimization in passive scattering carbon ion radiotherapy for patients with pancreatic cancer

Volume Parameter AP-1 AP-2 TM BM Original plan
CTV1 V95 (%) 99.4 (95.6–99.9) 97.5(94.3–99.4) 88.3 (79.4–97.5)* 84.8 (67.7–96.7)* 99.5 (93.0–99.9)
  V90 (%) 99.9 (99.1–100) 99.5 (98.7–100) 94.7 (89.1–99.7)* 91.2 (76.4–99.4)* 100 (97.8–100)
  D98 [Gy (RBE)] 40.1(38.4–40.8) 39.1 (37.9–40.3) 35.5 (32.1–39.1)* 33.0 (22.8–38.8)* 40.2 (37.1–40.7)
  Mean [Gy (RBE)] 41.4 (41.1–42.0) 41.3 (41.1–41.5) 40.9 (40.2–41.2)* 40.6 (38.5–41.1)* 41.4 (41.1–41.7)
CTV2 V95 (%) 96.7 (85.1–99.8) 91.8 (82.5–98.4)* 85.1 (81.0–98.3)* 80.5 (37.1–95.1)* 93.5 (86.1–100)
  V90 (%) 99.0 (91.1–100) 96.6 (88.5–99.8) 94.4 (89.9–99.6) 89.4 (46.5–98.3)* 98.5 (91.3–100)
  D98 [Gy (RBE)] 51.2 (43.8–54.5) 48.3 (44.4–52.8) 46.3 (43.4–52.8) 44.7 (21.6–50.0)* 49.3 (43.3–54.6)
  Mean [Gy (RBE)] 55.0 (54.3–55.4) 54.7 (54.0–55.2)* 54.4 (53.9–55.2)* 53.8 (44.6–54.9)* 54.8 (54.3–55.3)
GTV V95 (%) 99.0 (88.2–100) 97.3 (90.7–100) 94.9 (85.8–100) 90.5 (44.4–100)* 98.5 (85.6–100)
  V90 (%) 99.8 (93.5–100) 99.6 (96.4–100) 99.0 (94.5–100) 96.7 (53.5–100)* 99.6 (90.9–100)
  D98 [Gy (RBE)] 53.6 (45.5–55.3) 52.1 (47.8–55.0) 50.8 (47.6–55.1) 48.0 (28.4–54.9)* 52.3 (43.3–55.1)
  Mean [Gy (RBE)] 55.2 (54.8–55.6) 55.1 (54.5–55.5) 55.0 (54.3–55.4) 54.6 (47.3–55.4)* 55.1 (54.3–55.5)
Duodenum D2cc [Gy (RBE)] 28.5 (18.5–36.3) 32.1 (22.2–49.8)* 27.2 (20.8–47.4) 31.1 (18.2–46.9) 25.2 (21.3–40.2)
  V10 [Gy (RBE)] (ml) 36.8 (21.8–79.5) 37.1 (22.5–82.5) 40.7 (24.3–79.0) 38.2 (27.7–81.0) 41.2 (22.5–82.7)
  V20 [Gy (RBE)] (ml) 7.0 (1.7–25.6) 11.0 (3.1–52.2)* 5.6 (2.1–29.6)* 7.2 (0.9–25.5)* 3.5 (2.3–20.1)
  V30 [Gy (RBE)] (ml) 1.4 (0.5–10.6) 2.9 (0.2–19.7) 1.9 (0.3–13.2) 2.5 (0.0–10.3) 1.0 (0.4–9.5)
  Mean [Gy (RBE)] 11.4 (6.8–15.1) 12.8 (7.8–22.4) 10.7 (7.8–20.5) 11.6 (7.8–19.2) 10.1 (7.7–15.6)
Stomach D2cc [Gy (RBE)] 35.2 (19.0–40.1) 38.4 (23.7–42.3) 34.0 (18.9–38.4) 35.3 (21.1–44.0) 36.0 (16.9–43.6)
  V10 [Gy (RBE)] (ml) 73.4 (23.3–106.1) 73.9 (26.1–106.3) 71.3 (17.2–107.6) 65.4 (19.2–100.1) 82.5 (20.9–113.8)
  V20 [Gy (RBE)] (ml) 14.2 (1.7–45.2) 20.3 (3.8–48.9) 17.4 (1.6–49.7) 20.8 (2.4–45.4) 15.7 (1.1–51.2)
  V30 [Gy (RBE)] (ml) 4.7 (0.2–18.0) 6.6 (0.6–21.6) 5.4 (0.1–22.3) 5.1 (0.3–20.7) 6.3 (0.1–26.9)
  Mean [Gy (RBE)] 7.6 (3.5–16.9) 7.6 (3.9–17.8) 7.3 (2.8–17.7) 6.8 (3.2–16.6) 8.9 (2.9–18.9)
  1. Data are presented as median (range)
  2. TM tumor matching, BM bone matching, CTV clinical target volume, GTV gross tumor volume, V95 and V90 the percentage of the volume receiving 95% and 90% of prescribed dose, D98 the dose coverage 98% of the volume. Vn the absolute volume receiving n Gy (RBE)
  3. *P < 0.05 compared with original plan