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Echo planar imaging

Dr Yuranga Weerakkody and Dr Usman Bashir et al.

Echo planar imaging is the acquisition of multiple echoes following the 90° / 180° in a spin-echo sequence. Each subsequent echo results in a progressively T2-weighted signal. As a result an image can be acquired in 20 - 100 msec, allowing excellent temporal resolution such as that required in cardiac imaging.

Benefits

reduced imaging time
decreased motion artifact,
ability to image rapid physiologic processes of the human body.

Applications

cardiac imaging
abdominal imaging, i.e., breath-hold sequences and 3D MR angiography
diffusion imaging
perfusion imaging
functional imaging

diffusion weighted imaging

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References

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1. Poustchi-amin M, Mirowitz SA, Brown JJ et-al. Principles and applications of echo-planar imaging: a review for the general radiologist. Radiographics. 21 (3): 767-79. Radiographics (citation) - Pubmed citation