Figure 1From: Evaluation of inter-fraction and intra-fraction errors during volumetric modulated arc therapy in nasopharyngeal carcinoma patientsComparison of cone-beam computed tomography (CT) images and planning CT images of an NPC patient. The top and bottom images are cone-beam CT images and planning CT images, respectively. (a), (b) and (c) are images obtained in the sagittal, coronal and transverse planes, respectively.Back to article page