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Delivery efficiency curve comparisons. P-RSBT with different paddle sizes was compared to S-RSBT and D-RSBT on five clinical cases. A point on a delivery efficiency curve stands for the maximal D90 (y-axis) that can be achieved with the corresponding delivery method for a given delivery time (x-axis). The rotation stride r ⋅ δφ for P-RSBT was 5°.
