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Real-time geometric distortion correction for interventional imaging with echo-planar imaging (EPI).
- Iulius Dragonu, Baudouin Denis de Senneville, Bruno Quesson, Chrit Moonen, and Mario Ries.
- Laboratory for Molecular and Functional Imaging: from Physiology to Therapy, Unité Mixte de Recherche 5231 Centre National de la Recherche Scientifique/Université Bordeaux 2, Bordeaux, France.
- Magn Reson Med. 2009 Apr 1; 61 (4): 994-1000.
AbstractMany 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.
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