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Table 1 Target coverage goals for the gross tumour volume (GTV) and planning target volume (PTV) on the ARREST clinical trial

From: Ablative radiation therapy to restrain everything safely treatable (ARREST): study protocol for a phase I trial treating polymetastatic cancer with stereotactic radiotherapy

Goal Acceptable Not acceptable
PTV: ≥95% of the PTV to receive ≥95% of the prescription dose for every lesion. GTV: ≥95% of the GTV to receive ≥95% of the prescription dose for every lesion. 1. Failure to meet dose constraints listed in Additional file 1
2. Not being able to meet minimum “Acceptable” coverage for every lesion i.e.
3. < 90% of lesions meet the “Goal” target coverage criteria