Figure 3From: 3D-image-guided HDR-brachytherapy versus 2D HDR - brachytherapy after external beam radiotherapy for early T-stage nasopharyngeal carcinoma Axial computed tomography (CT) image of a stage T1-2a NPC patient showing two brachytherapy intracavitary applicators in situ with 2.5 Gy, 2.25 Gy, 1.75 Gy, 1.25 Gy, and 0.75 Gy isodose lines.Back to article page