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Real-time geometric distortion correction for interventional imaging with echo-planar imaging (EPI)

✍ Scribed by Iulius Dragonu; Baudouin Denis de Senneville; Bruno Quesson; Chrit Moonen; Mario Ries

Publisher
John Wiley and Sons
Year
2009
Tongue
English
Weight
349 KB
Volume
61
Category
Article
ISSN
0740-3194

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✦ Synopsis

Abstract

Many MR‐guided interventional procedures rely on fast imaging sequences for providing images in real‐time with a precise relation between the target position in the image and its true position. Echo‐planar imaging (EPI) methods are very fast but prone to geometric distortions. Here, we propose a correction method designed for real‐time conditions, adapting existing approaches based on dual EPI acquisition with varying echo times. The method is demonstrated with MR‐thermometry for guiding thermal therapies. The proposed approach imposes a small penalty in acquisition speed but adds negligible latency to data processing, an important element for interventions of mobile organs. Magn Reson Med, 2009. © 2009 Wiley‐Liss, Inc.

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