680205.fig.002a
(a)
680205.fig.002b
(b)
Figure 2: DVH of the rectal wall for one representative patient, where the solid line is with retractor and the dashed line is without the retractor. In the left DVH, the rectal volume is presented as relative volume (%) and in the right DVH the volume is presented as absolute volume. Note that the volume is larger with retractor compared to without.