Jerome Chaptinel1, Yvan Mivelaz2, Jerome Yerly1,3, Leonor Alamo1, Milan Prsa2, Yvan Vial4, François Gudinchet1, Gregoire Berchier1, Jean-Baptiste Ledoux1, and Matthias Stuber1,3
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.
