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Table 1 Comparison of the plan results for the phantom.

From: Two-step intensity modulated arc therapy (2-step IMAT) with segment weight and width optimization

  Plan 1 Plan 2 Plan 3 Plan 4
D PTV, max (%) 165.9 113.4 108.4 110.7
D PTV, min (%) 76.1 97.6 97.6 97.4
V 107, PTV (%) 90.6 20.7 3.3 12.3
HI 2.18 1.16 1.11 1.14
D OAR, max (%) 44.6 52.2 47.5 47.8