What is the role of MRI in the evaluation of hydrocephalus?

Updated: Jun 04, 2018
  • Author: Stephen L Nelson, Jr, MD, PhD, FAACPDM, FAAN, FAAP; Chief Editor: Jasvinder Chawla, MD, MBA  more...
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Answer

MRI can evaluate for Chiari malformation or cerebellar or periaqueductal tumors. It affords better imaging of the posterior fossa than CT. MRI can differentiate normal pressure hydrocephalus (NPH) from cerebral atrophy although the distinctions may be challenging. Flow voids in the third ventricle and transependymal fluid exudates are helpful. However, numerous suitable patients have a brain pattern suggestive of atrophy and small vessel ischemic disease that may ultimately be NPH. [14] Guidelines for imaging studies in suspected NPH have been established. [15]


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