Plots of pass rates of 1% dose difference from noninterrupted delivery on a central coronal plane for the five cases as a function of beam-on-time between interrupts. The dose difference was normalized to each local dose with no interrupt, and a dose threshold of 10% of the maximum dose on the coronal plane was employed for the pass rate calculation. Each circle shows each mean of the five cases, and a vertical line indicates a range, where most of the ranges were too small to be visualized.