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Representative dose-volume histogram of spinal cord, optic chiasm, brainstem, and optic nerve for 9F-IMRT, 2ARC-VMAT, and Hybrid IMRT/VMAT. The curves of 9F-IMRT, 2ARC-VMAT, and Hybrid IMRT/VMAT are indicated in solid lines, dashed lines, and dotted lines, respectively.
