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Table 2 Summary of the DVH analysis for the CTV, PTV and Organs at Risk

From: Stereotactic body radiotherapy (sbrt) in lung oligometastatic patients: role of local treatments

Parameter Objective Mean ± SD Range
CTV
Volume = 13.9 ± 25.8 cm3 Range = [.5 – 183.6] cm3
Mean [Gy] 100% 101.4 ± 1.7 [98.4 - 106.4]
V 98% [%] >98% 98.1 ± 3.4 [80.3 - 100.0]
D 99% [Gy] Maximize 98.25 ± 1.7 [94.3 - 103.2]
D 1% [Gy] Minimize 104.3 ± 2.1 [99.8 - 112.9]
PTV
Volume = 42.3 ± 51.2 cm3 Range = [2.5 – 333.1] cm3
Mean [Gy] 100% 100.3 ± 0.3 [96.8 - 104.9]
V 95% [%] >95% 96.7 ± 1.9 [90.2 - 99.9]
D 99% [Gy] Maximize 93.1 ± 2.0 [89.5 - 96.6]
D 1% [Gy] Minimize 104.8 ± 1.8 [101.9 - 112.9]
Lungs
Mean [Gy] <4 Gy 3.7 ± 3.8 [0.5 - 16.8]
V 5Gy [%] <30% 17.9 ± 18.8 [0.1 - 78.2]
V 10Gy [%] <20% 11.2 ± 14.2 [0.1 - 65.8]
V 20Gy [%] <10% 5.2 ± 7.4 [0.0 - 34.6]
Spinal cord
D 1% [Gy] <20 Gy 10.2 ± 5.6 [2.2 - 21.7]
Heart
D 1% [Gy] <30 Gy 11.3 ± 10.9 [0.5 - 28.6]
Esophagus
D 1% [Gy] <30 Gy 16.3 ± 11.5 [5.1 - 36.1]
  1. Dx%: dose received by at least x% of the volume; Vx%: volume receiving at least x% of the dose.
  2. Data are reported as average values plus or minus standard deviation and range.