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Table 2 Average dose-volumetric parameters of primary plans

From: The effect of extremely narrow MLC leaf width on the plan quality of VMAT for prostate cancer

  Original plan Shifted plan p
Primary target volume
D1% (Gy) 51.99 ± 0.36 51.71 ± 0.31 <0.001
Mean dose (Gy) 50.70 ± 0.22 50.50 ± 0.20 0.007
D99% (Gy) 47.87 ± 0.36 47.94 ± 0.32 0.026
D95% (Gy) 49.33 ± 0.08 49.30 ± 0.07 0.107
D5% (Gy) 51.58 ± 0.33 51.32 ± 0.31 0.014
V95% (%) 99.07 ± 0.36 99.15 ± 0.35 0.478
Conformity index 1.06 ± 0.05 1.04 ± 0.04 0.006
Homogeneity index 0.07 ± 0.01 0.06 ± 0.01 <0.001
Normal tissue
Gradient measure (cm) 1.86 ± 0.18 2.01 ± 0.26 0.041
Monitor Unit (MU)
MU 532 ± 115 572 ± 117 0.294
  1. Abbreviations: D n% Dose received by at least n% volume of the target volume, V n% the percent volume of a structure irradiated by at least n% of the prescription dose