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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