Long-term stability analysis of beam shape in a robotic radiosurgery system.

The solid yellow line represents the moving average over the elapsed MU to facilitate the visualization of trends in the parameters. Penumbra: In the longitudinal orientation (Figure 3a,b ), both sides of the penumbra showed a significant decreasing trend that was particularly pronounced in the negative side and exhibited a highly significant decrease over time ( p < 0.001), as shown in Table 1 .

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