Diffusion-weighted imaging of the brain: normal patterns, traps and artifacts

Owing to its rapid acquisition time and high sensitivity, diffusion-weighted imaging has turned into a routine sequence for brain imaging. This is the case not only for stroke, but also for various diseases such as abscesses or tumors. Being aware of the artifacts is important for optimal interpreta...

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Bibliographic Details
Published in:Journal de radiologie 2006-12, Vol.87 (12 Pt 1), p.1837-1847
Main Authors: Bertrand, A, Oppenheim, C, Moulahi, H, Naggara, O, Rodrigo, S, Patsoura, S, Adamsbaum, C, Pierrefitte, S, Meder, J F
Format: Article
Language:fre
Subjects:
Brain - anatomy & histology
Diffusion Magnetic Resonance Imaging
Humans
Online Access:Get full text
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Summary:Owing to its rapid acquisition time and high sensitivity, diffusion-weighted imaging has turned into a routine sequence for brain imaging. This is the case not only for stroke, but also for various diseases such as abscesses or tumors. Being aware of the artifacts is important for optimal interpretation. After a brief review of the normal patterns, the most frequent artifacts, inherent to the echoplanar imaging technique, are described and we provide suggestions to avoid them. Most current traps are caused by T2-weighting of the diffusion images; the key for avoiding erroneous interpretation relies on the ADC map.
ISSN:0221-0363
DOI:10.1016/S0221-0363(06)74164-6