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Average values with maximum/minimum range for the planning target volume (PTV) margins proposed in the literature for different techniques: (1) positioning on external marks using room lasers (9 references), (2) image-guided radiation therapy (40 references), (3) bone anatomy match (6 references), (4) soft tissue match (3 references), (5) fiducial markers (28 references), (6) electromagnetic tracking (5 references) and (7) adapted delivery (16 references).
