Fig. 3From: Dosimetric study between a single isocenter dynamic conformal arc therapy technique and Gamma Knife radiosurgery for multiple brain metastases treatment: impact of target volume geometrical characteristicsPaddick Index absolute difference between MBM and GP as a function of the volume, the distance to the isocenter, the Sphericity Index and the major axis diameter determined with a multivariate regression approach. The green segments of the abscissa axis highlight the range of values where the difference is statistically significantBack to article page