Figure 6

The risk of second cancer in different groups based on the full mechanistic dose-response model. A1, B1, and C1 indicate excess absolute risks to the contralateral breast (CB), contralateral lung (CL), and ipsilateral lung (IL), respectively. *indicates a statistically significant difference between groups; †indicates a significant difference for alternative techniques compared to group 1 (G1) and group 2 (G2). W-TF = 3D-CRT with two tangential fields and wedges; 2F-IMRT = IMRT with two tangential fields; 6F-IMRT = IMRT with six fields; and VMAT = VMAT with double partial arcs.