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. 2018 Oct 29;10(10):e3510. doi: 10.7759/cureus.3510

Figure 3. Comparison of beam profiles in both X and Y directions between Halcyon’s native 6FFF beam and DBF sequence using upper layer MLC motion; ripples in the flattened beam profile perpendicular to the MLC travel caused by the tongue-and-groove effect.

Figure 3

DBF: dynamic beam flattening; MLC: multi-leaf collimator