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Purely regular motion, 1cm peak to peak amplitude on axis with a 2.5cm beam and all leaves open. The upper-left plot is the beam model, a. The upper-right is the dose(y,t) function, b. If one chooses a particular voxel in b, and plot its dose(t), then the lower left plot is obtained, c. If one time-integrates the dose for each position, then the dose profile is obtained: lower-right plot, d. Notice that there are no unwanted dose modulations in d.
