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Figure 4: DVH-based curves of the rectal wall for cases that did not pass the criterion of V78 Gy<1% for any of the four KBP models. The KBPORIG, KBPC-DVH, and KBPC-REGmodels had two cases (a and b), four cases (a and c-e), and three cases (c, f and g), respectively, that did not meet the V78 Gy<1% criterion. The DVH curves for KBPORIG, KBPC-DVH, and KBPC-REGshow a long tail close to the maximum dose in some cases, whereas that for KBPC-ALLhad no tail in any case. KBP: Knowledge-based treatment planning, DVH: Dose–volume histogram

Figure 4: DVH-based curves of the rectal wall for cases that did not pass the criterion of V<sub>78 Gy</sub><1% for any of the four KBP models. The KBP<sub>ORIG</sub>, KBP<sub>C-DVH</sub>, and KBP<sub>C-REG</sub>models had two cases (a and b), four cases (a and c-e), and three cases (c, f and g), respectively, that did not meet the V<sub>78 Gy</sub><1% criterion. The DVH curves for KBP<sub>ORIG</sub>, KBP<sub>C-DVH</sub>, and KBP<sub>C-REG</sub>show a long tail close to the maximum dose in some cases, whereas that for KBP<sub>C-ALL</sub>had no tail in any case. KBP: Knowledge-based treatment planning, DVH: Dose–volume histogram