Abstract #0459

A Golden-Angle Acquisition Coupled with k-t Sparse SENSE Reconstruction for Fetal Self Retro-Gated Cine Cardiac MRI: an In Vivo Feasibility Study

Jerome Chaptinel¹, Yvan Mivelaz², Jerome Yerly^1,3, Leonor Alamo¹, Milan Prsa², Yvan Vial⁴, François Gudinchet¹, Gregoire Berchier¹, Jean-Baptiste Ledoux¹, and Matthias Stuber^1,3

¹Department of Radiology, University Hospital (CHUV) and University of Lausanne (UNIL), Lausanne, Switzerland, ²Department of Pediatrics, University Hospital (CHUV) and University of Lausanne (UNIL), Lausanne, Switzerland, ³Center for Biomedical Imaging (CIBM), Lausanne, Switzerland, ⁴Department of Gynecology-Obstetrics, University Hospital (CHUV) and University of Lausanne (UNIL), Lausanne, Switzerland

Fetal cardiac cine MRI is challenging due to the lack of an ECG trigger signal, fetal motion, and the need for both a high spatial and temporal resolution. To overcome these hurdles, we have developed and tested a new acquisition-reconstruction paradigm: data collection was performed with a continuous radial golden-angle acquisition and cine images were reconstructed with a k-t sparse SENSE algorithm. A cardiac gating signal was extracted from the images themselves and supported self retro-gated reconstructions in which motion-corrupted data were excluded. Fetal self retro-gated cardiac cine images with high temporal and spatial resolution were successfully obtained in pregnant patients.

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