What is the role of diffusion-weighted imaging (DWI) in the workup of hypoxic-ischemic encephalopathy (HIE)?

Updated: Jul 18, 2018
  • Author: Santina A Zanelli, MD; Chief Editor: Dharmendra J Nimavat, MD, FAAP  more...
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Answer

DWI allows earlier identification of injury patterns in the first 24-48 hours. The MRI sequence identifies areas of edema and, hence, injured areas. DWI changes peak at 3-5 day and pseudonormalizes by the end of the first week. In neonates, DWI changes may underestimate the extent of injury, most likely because of the importance of apoptosis in the ultimate extent of neurologic injury. [41]


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