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Figure 1: Panel A. Preoperative MRI showing a right pterional meningioma. Panel B shows a preoperative DWMRI with normal optic nerves. Panel C. DWMRI showing diffusion restriction in the right ON. Panel D. ADC images showing reduced ADC in the right ON. Panel E. MRI MIP images showing a patent's right ophthalmic artery. Panel F. Postoperative CT showing minimal postoperative changes

Figure 1: Panel A. Preoperative MRI showing a right pterional meningioma. Panel B shows a preoperative DWMRI with normal optic nerves. Panel C. DWMRI showing diffusion restriction in the right ON. Panel D. ADC images showing reduced ADC in the right ON. Panel E. MRI MIP images showing a patent's right ophthalmic artery. Panel F. Postoperative CT showing minimal postoperative changes