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Abstract #2393

Self-gated cardiac Cine MRI of the rat on a clinical 3T MRI system

Martin Krmer 1 , Karl-Heinz Herrmann 1 , Judith Biermann 1 , Sebastian Freiburger 2 , Michael Schwarzer 2 , and Jrgen R Reichenbach 1

1 Medical Physics Group, Institute of Diagnostic and Interventional Radiology I, Jena University Hospital - Friedrich Schiller University Jena, Jena, TH, Germany, 2 Department of Cardiothoracic Surgery, Jena University Hospital - Friedrich Schiller University Jena, TH, Germany

To perform cardiac cine imaging of a rat with a clinical whole-body 3T MRI system, a single slice was repeatedly acquired with radial readouts rotated using the golden-angle. The acquisition was interspersed with repetitive measurements of 1D navigator projections with a high frequency of 54 Hz. From the navigator data a correlation function was derived showing both respiratory and cardiac motion. Thresholding the correlation function to exclude respiratory motion retrospective cardiac cine-reconstruction was performed by using the cardiac signal from the navigator data. Spatial in-plane resolution of 0.21 x 0.21 mm was achieved in less than 10 minutes

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