Fig. 1From: Circular collimator arc versus dynamic conformal arc treatment planning for linac-based stereotactic radiosurgery of an intracranial small single lesion: a perspective of lesion asymmetryDistributions of (a) planning target volume (PTV) size and (b) PTV asymmetry (Asym), and (c) the plot of PTV Asym as a function of PTV size for 95 lesions. Dotted lines represent median values of PTV size (0.415 cm3) and PTV Asym (6.12%)Back to article page