Figure 2From: Using neoadjuvant chemotherapy and replanning intensity-modulated radiotherapy for nasopharyngeal carcinoma with intracranial invasion to protect critical normal tissueAn example of the contour of the PTV CTV-H . The green shadow represented the PTVCTV-H1 and the blue line was PTVCTV-H2. The margin between tumor and critical normal was extended.Back to article page