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MR imaging of the fetal heart is challenging due to resolution requirements and the impact of maternal respiration, fetal cardiac motion, and gross fetal movement. These factors have largely precluded the development of 3D acquisition techniques. In this work, a novel reconstruction algorithm is developed to estimate and correct for displacement of the fetal heart due to maternal respiration and gross fetal movement enabling the first-ever motion-corrected time-resolved 4D images of the fetal heart from 3D radial data. Proof-of-concept results are demonstrated using a comprehensive numerical simulation developed for this work and initial data acquired in utero.
Ferincz et al. (Wed,) studied this question.