Fig. 2From: Prognostic value of the distance between the primary tumor and brainstem in the patients with locally advanced nasopharyngeal carcinomaRelationship of the distance between the primary tumor and brainstem (Dbs) and PGTVnx V95 % (a); PGTVnx V95 % (b); and the radiation dose to GTVnx (c) of the patients with locally-advanced NPC. The color-filled areas represent the target volumes: GTVnx (red); PGTVnx (blue); brainstem (yellow); and sacrificed volume of PGTVnx (SV-PGTVnx, orange)Back to article page