Fig. 3

Dose distribution of proton beam therapy. a The lymph nodes were treated with 60 Gy relative biological effectiveness. The liver metastasis in S4 (b) was treated with 79.2 Gy relative biological effectiveness
Dose distribution of proton beam therapy. a The lymph nodes were treated with 60 Gy relative biological effectiveness. The liver metastasis in S4 (b) was treated with 79.2 Gy relative biological effectiveness