Evaluation of Deformable Image Registration Methods for Dose Monitoring in Head and Neck Radiotherapy

Figure 3

Representation of the DVH differences between the DVH calculated from the weekly CT and the DVH from the planning CT for (a) the parotid glands, (b) the brain stem, (c) the spinal cord, and (d) the CTV₇₀. DVH: dose-volume histogram and CTV₇₀: clinical target volume receiving 70 Gy. For each subfigure the dashed lines represent the maximum and the minimum DVH difference values; the black line represents the mean DVH difference. Each color represents the 75%, 50%, and 25% interquantile range of the data.

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