Figure 5. Skin reaction graph for the nasopharyngeal carcinoma (NPC) patient in Figure 4, for bothradium and X-ray fields for the skin of the temple. Treatment was described as follows. "A 5 cm field was placed in each preauricular region, a 5 cm field in each superior labial region, and an 8 cm field in each superior cervical region" [35]. The total dose received by the skin of the neck in 40 days was 7400 roentgen (r) from the radium beam and 5500 r from the X-ray beam. The total dose received on the skin of the temple in 46 days from the radium beam was 8700 r and from the X-ray beam 6500 r. Of the 20 cases of NPC treated, the "percentage cured" was estimated to be 25% with a 95% confidence interval of 9–51%. This, as expected from the small number of cases, is very wide [35].