Fig. 3From: A multicenter prospective phase III clinical randomized study of simultaneous integrated boost intensity-modulated radiotherapy with or without concurrent chemotherapy in patients with esophageal cancer: 3JECROG P-02 study protocolTarget contouring for (a, b) elective nodal irradiation (ENI) and (c, d) involved-field irradiation (IFI). The red area indicates the gross tumor volume (GTV-T); the grey area, the gross tumor volume for lymph nodes (GTV-N); the blue area, the planning gross tumor volume (PGTV); and the green area, the planning target volume (PTV)Back to article page