Abstract #4033

MR-embedded respiratory motion tracking in ZTE lung imaging for PET-MRI

Tanguy Boucneau¹, Brice Fernandez², Michael Soussan³, Luc Darrasse¹, and Xavier Maître¹

¹Imagerie par Résonance Magnétique Médicale et Multi-Modalités, IR4M, CNRS, Univ Paris-Sud, Université Paris-Saclay, Orsay, France, ²Applications & Workflow, GE Healthcare, Orsay, France, ³Imagerie Moléculaire in Vivo, IMIV, Inserm, CEA, CNRS, Univ Paris-Sud, Université Paris-Saclay, Orsay, France

This study aims at showing the feasibility of MR-embedded respiratory motion tracking in ZTE lung imaging. It was shown that the motion information in a moving phantom as well as in free-breathing human volunteers and patients could be extracted from the off-center k-space data sampled during a ZTE acquisition with a faithful accuracy and precision in time and in amplitude with respect to a respiratory belt measurement. This new intrinsic motion follow-up method could be useful for retrospective motion correction of simultaneously acquired PET/MR images.

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