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Real‐time geometric distortion correction for interventional imaging with echo‐planar imaging (EPI)
Author(s) -
Dragonu Iulius,
de Senneville Baudouin Denis,
Quesson Bruno,
Moonen Chrit,
Ries Mario
Publication year - 2009
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/mrm.21903
Subject(s) - computer science , computer vision , echo (communications protocol) , real time mri , artificial intelligence , planar , position (finance) , distortion (music) , data acquisition , echo planar imaging , magnetic resonance imaging , computer graphics (images) , medicine , radiology , computer network , amplifier , finance , bandwidth (computing) , economics , operating system
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.