Figure 5.

Comparison of the simulated effects of the positioning errors with/without CBCT-based online set-up correction in the LR, SI and AP axes on the irradiation dose of the spinal cord with the actual plan (red and orange line: isocenter moving left/right in LR axis, yellow and deep green lines: isocenter moving superior/inferior in SI axis, blue and purple lines: isocenter moving anterior/posterior in AP axis, respectively; and the green line was the actual DVH of the cord). (a: the simulated and actual DVHs of the cord and b: the simulated and actual maximum dose of 5% volume of the cord).