Fig. 2

Classification of the KBP result for each OAR metric for a single fraction and b three fraction schedules. OAR metrics are ordered from maximum dose constraints to volumetric constraints. Improvement possible = KBP was < 90% of submitted plan value; Within 10% = KBP was within 10% of the submitted plan value; Submitted superior = KBP was > 110% of submitted plan value; Submitted plan fails, KBP passes = Submitted plan did not meet constraint, but KBP did; Submitted plan passes, KBP fails = Submitted plan met constraint, but KBP did not. Note the constraint for Kidney_I V50% was ALARA, therefore a plan could not fail this metric