Figure 1From: Selective use of postoperative neck radiotherapy in oral cavity and oropharynx cancer: a prospective clinical studyThe radiologic imaging of nodal recurrence volume was co-registered with the pre-treatment CT data set used for treatment planning. (A) DVH analysis of nodal failure “in field”. (B) DVH analysis of nodal failure “marginal field”. (C) DVH analysis of nodal failure “out-field”.Back to article page