Fig. 1From: Primary tumor volume delineation in head and neck cancer: missing the tip of the iceberg?Differences in target volume delineation in soft tissue and lung windows. GTV and CTV contoured on lung window (green structures) are slightly larger than their counterparts contoured in soft tissue window (red structures). a: Both GTVs on soft tissue window; b: Both GTVs on lung window; c: Both CTVs on soft tissue window; d: Both CTVs on lung windowBack to article page