Fig. 1

The incidence of ≥ 2 grade RP in 119 patients. There are 38 (31.9%) patients had developed ≥ 2 grade RP in total 119 patients, of which 27 (22.7%) had 2 grade RP and 11 (9.2%) had 3 grade radiation pneumonia. No one has developed 4 or 5 grade RP