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Abstract #2053

Free-breathing whole-heart coronary MRA with Radial SSFP and fully automated 3D rigid body motion corrected reconstruction

Guruprasad Krishnamoorthy1,2, Joao Tourais1,2, Jouke Smink1, Marc Kouwenhoven1, Suthambhara Nagaraj3, and Marcel Breeuwer1

1MR Clinical Science, Philips Healthcare, Best, Netherlands, 2Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, Netherlands, 3MR R&D, Philips Healthcare, Bangalore, India

Prolonged acquisition time and susceptibility to respiratory motion remain to be the major challenge in 3D free-breathing whole-heart MR angiography. Recently, respiratory self-navigated 3D-Radial CMRA technique has been proposed to address the said limitations. In this technique, a 1-D projection oriented in Superior-Inferior direction are acquired at every heartbeat before each interleave of 3D-Radial imaging data for 1D motion correction of the heart with 100% respiratory gating efficiency. In this work, an extension of this method is proposed to estimate and correct for the 3D motion of the heart along with a robust navigator processing and automatic coil selection algorithm (3D-PRONAV). The proposed method is validated in five volunteers.

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