Julian Maclaren1, Kuan Lee1,
Chaiya Luengviriya2,3, Michael Herbst1, Oliver Speck2,
Maxim Zaitsev1
1Medical Physics, Dept. of
Radiology, University Medical Center Freiburg, Freiburg, Germany; 2Dept.
of Biomedical Magnetic Resonance, Otto-von-Guericke University, Magdeburg,
Germany; 3Dept. of Physics, Kasetsart University, Thailand
Subject motion is a major limiting factor in high-resolution imaging of the brain. By updating the imaging volume continuously during imaging, prospective motion correction offers a solution to this problem; however, navigator data must be extremely precise if the reconstructed images are to be free of artifacts. This work presents a combined prospective-retrospective approach, which corrects for motion prospectively, but then estimates navigator errors after imaging and corrects for these retrospectively. Simulations and in vivo experiments demonstrate the effectiveness of the method.
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