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Figure 1: High-resolution MRI and magnetic resonance angiography of the brain. Diffusion-weighted image (a) shows an acute infarction of the right lateral medulla. Magnetic resonance angiography (b) shows a long stenosis (white arrows) of the right vertebral artery. Three-dimensional space T1-weighted MRI of vertebral artery (c, d) reveals the high signals (arrowhead) of intramural hematoma indicating the diagnosis of dissection

Figure 1: High-resolution MRI and magnetic resonance angiography of the brain. Diffusion-weighted image (a) shows an acute infarction of the right lateral medulla. Magnetic resonance angiography (b) shows a long stenosis (white arrows) of the right vertebral artery. Three-dimensional space T1-weighted MRI of vertebral artery (c, d) reveals the high signals (arrowhead) of intramural hematoma indicating the diagnosis of dissection