Fig. 5

Linear regression for dose metrics vs tumor volume. a ∆D50 vs tumor volume (Slope_fit = −0.046 Gy/cm³, R ² = 0.505, P = 0.003). b ∆D _avg vs tumor volume (Slope_fit = −0.04 Gy/cm³, R ² = 0.354, P = 0.02). c ∆V100 vs tumor volume (Slope_fit = −0.034%/cm³, R ² = 0.615, P = 5.4e−4)