Vertigo MRI

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

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MRI

• MRI is superior to a CT scan due to its ability to visualize the posterior fossa.

===MRI/MRA:=== .

• If history/physical examination suggests central cause of vertigo
• If unable to distinguish central vs. peripheral etiology in patient with risk factors for cerebrovascular accident (CVA)
• Sensitivity/specificity of MRA > 95% for posterior circulation lesion

MRI of Internal Auditory Canal/Cerebellopontine Angle

• If acoustic neuroma suspected
• Incidence of acoustic neuroma in patients with vertigo and no hearing loss: 1/9000
• Incidence of acoustic neuroma in patients with dizziness and asymmetric hearing loss: 1/600