Use Dose Bricks Concept to Implement Nasopharyngeal Carcinoma Treatment Planning

Figure 9

This photo shows the accuracy check of mechanical isocenter and treatment setup. Film was put parallel to treatment table top at the isocenter without any phantom on film and exposure by RSAO, LSAO, LAO, and RAO fields. The two white dash lines can be used to check the abutting junction line of “A” shape to LAO, LSAO, RAO, and RSAO.