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5 - Advanced neuroimaging techniques in children with traumatic brain injury

Published online by Cambridge University Press:  14 May 2010

By
Stephen Ashwal ,
Karen A. Tong ,
Andre Obenaus  and
Barbara A. Holshouser
Edited by
Vicki Anderson  and
Keith Owen Yeates
Vicki Anderson
Affiliation:
University of Melbourne
Keith Owen Yeates
Affiliation:
Ohio State University
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Summary

Pediatric traumatic brain injury remains a major public health problem. Fortunately, the advent of several neuroimaging techniques has improved our ability to better diagnose and treat affected children. Because intensive care therapy has resulted in lowered mortality and morbidity, attention is also focusing on issues related to brain recovery and reorganization. It is likely that, in the future, imaging may better define the relation between structural and functional deficits and approaches will be developed to guide treatment paradigms. In this review, we examine four imaging methods that are increasingly used for the assessment of pediatric brain injury. Susceptibility weighted imaging is a 3-D high-resolution magnetic resonance imaging technique that is more sensitive than conventional imaging in detecting hemorrhagic lesions that are often associated with diffuse axonal injury. Magnetic resonance spectroscopy acquires metabolite information reflecting neuronal integrity and functions from multiple brain regions and provides sensitive, non-invasive assessment of neurochemical alterations that offers early prognostic information regarding outcome. Diffusion weighted imaging is based on differences in diffusion of water molecules within the brain and is sensitive in the early detection of ischemic injury. Diffusion tensor imaging is a form of diffusion weighted imaging and allows better evaluation of white matter fiber tracts by taking advantage of the intrinsic directionality (anisotropy) of water diffusion in human brain and is useful in identifying white matter abnormalities after diffuse axonal injury.

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Pediatric Traumatic Brain Injury
New Frontiers in Clinical and Translational Research
 , pp. 68 - 93
Publisher: Cambridge University Press
Print publication year: 2010

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