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Additional file 4: Video S4. Representative reconstructions of fetal hearts undergoing through-plane motion. This video corresponds to the same images shown in Fig. 5. For comparison, one representative cycle from the real-time reconstructions is shown for each quiescent period as well as well as reordered cine reconstructions (with and without motion correction) in short axis views derived from separate reconstruction of quiescent periods (a and b). Papillary muscles are denoted by arrows and are best visualized by the reordered cine images. (MP4 8384 kb)