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Abstract #0583

Prospective motion correction with FID-triggered image navigators

Maryna Babayeva 1,2 , Pavel Falkovskiy 1,2 , Tom Hilbert 1,2 , Guillaume Bonnier 1,2 , Bndicte Marchal 1,2 , Reto Meuli 3 , Jean-Philippe Thiran 2 , Rolf Gruetter 3,4 , Gunnar Krueger 1,2 , and Tobias Kober 1,2

1 Siemens ACIT - CHUV Radiology, Siemens Healthcare IM BM PI, & Department of Radiology, University Hospital (CHUV), Lausanne, Switzerland, 2 LTS5, cole Polytechnique Fdrale de Lausanne, Lausanne, Switzerland, 3 Department of Radiology, University Hospital (CHUV), Lausanne, Switzerland, 4 CIBM, cole Polytechnique Fdrale de Lausanne and University of Geneva, Switzerland

In this work, we propose a method for prospective motion correction in MRI using a novel image navigator module, which is triggered by a free induction decay (FID) navigator. Only when motion occurs, the image navigator is run and new positional information is obtained through image registration. The image navigator was specifically designed to match the impact on the magnetization and the acoustic noise of the host sequence. This detection-correction scheme was implemented for an MP-RAGE sequence and 5 healthy volunteers were scanned at 3T while performing various head movements. The correction performance was demonstrated through automated brain segmentation and an image quality index whose results are sensitive to motion artifacts.

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