FIGURE 6.

Examples of the plans scored ≤3. The thick yellow lines represent the 100% isodose line, and the thick red lines represent the planning target volume (PTV). (a) The 4‐field‐box plan was scored as 3 because of the excessive dose to the bowel. (b) The 3D conformal radiotherapy plan was scored as 3 as the PTV (red) was not fully covered by a 100% isodose line near the bowel. (c) The volumetric modulated arc therapy plan was scored as 2 as the PTV (red) was not fully covered by a 100% isodose line near the rectum