Real-time geometric distortion correction for interventional imaging with echo-planar imaging (EPI)
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en
Article de revue
Ce document a été publié dans
Magnetic Resonance in Medicine. 2009, vol. 61, n° 4, p. 994–1000
Wiley
Résumé en anglais
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) ...Lire la suite >
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.< Réduire
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