Figure 1From: Evaluation of the value of ENI in radiotherapy for cervical and upper thoracic esophageal cancer: a retrospective analysisFailure patterns of the IFI group and the ENI group. ENI = elective nodal irradiation. Red: GTV; Blue: IFI field in the coronal direction; Green: ENI field in the coronal direction; Orange: the Out-PTVifi in-PTVeni field.Back to article page