PMC5046741_01
T2-weighted axial magnetic resonance imaging of the cervical spine through the C5-C6 and C6-C7 levels, demonstrating a moderate near-midline left herniation of the C5-C6 intervertebral disk compressing the cervical cord (a), as well as a large right paramedian herniation of the C6-C7 intervertebral disk compressing the right C7 nerve root (b)
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F1
Magnetic resonance imaging (MRI) of the cervical spine demonstrated a moderate near-midline left herniation of the C5-C6 intervertebral disk compressing the cervical cord, as well as a large right paramedian herniation of the C6-C7 intervertebral disk compressing the right C7 nerve root [Figure 1a and b].
Sagittal non-contrast computed tomography of the cervical spine, showing appropriate placement of the fusion construct at the C5-C7 vertebral levels
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F2
Postoperative radiographs demonstrated normal alignment of the cervical spine with appropriate positioning of the fusion construct [Figure 2].
Axial computed tomography angiogram of the neck demonstrating near-complete occlusion of the right internal carotid artery (arrow), as well as greater than 50% stenosis of the left internal carotid artery (arrowhead)
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F3
CT angiogram (CTA) of the head and neck revealed near-complete occlusion of the right internal carotid artery and greater than 50% stenosis of the left internal carotid artery, with otherwise normal arterial anatomy without evidence of dissection [Figure 3].
T2 fluid-attenuated inversion recovery (a, b) and diffusion weighted (c, d) images demonstrating multiple right hemispheric infarcts in a watershed pattern, involving frontal, parietal, and temporal territories of the anterior circulation
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F4
MRI/MRA of the head and neck showed greater than 50% occlusion of the left internal carotid artery without evidence of dissection, complete occlusion of the right internal carotid artery at its origin with slow reconstitution at the petrous level, slow intracranial flow distally indicating insufficient collateral flow, and extensive diffusion restriction and fluid-attenuated inversion recovery changes in a typical watershed distribution throughout the right hemisphere [Figures 4 and 5].
Time-of-flight magnetic resonance angiogram of the neck demonstrating absent flow through the right internal carotid artery at its origin (a), as well as greater than 50% stenosis of the left internal carotid artery with prominent irregularity (b)
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F5
MRI/MRA of the head and neck showed greater than 50% occlusion of the left internal carotid artery without evidence of dissection, complete occlusion of the right internal carotid artery at its origin with slow reconstitution at the petrous level, slow intracranial flow distally indicating insufficient collateral flow, and extensive diffusion restriction and fluid-attenuated inversion recovery changes in a typical watershed distribution throughout the right hemisphere [Figures 4 and 5].