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Med Image Comput Comput Assist Interv. 2016 Oct;9902:54-62. doi: 10.1007/978-3-319-46726-9_7. Epub 2016 Oct 2.

Temporal Registration in In-Utero Volumetric MRI Time Series.

Author information

1
Massachusetts Institute of Technology, Cambridge, MA, USA.
2
Harvard Medical School, Boston Children's Hospital, Boston, MA, USA.

Abstract

We present a robust method to correct for motion and deformations in in-utero volumetric MRI time series. Spatio-temporal analysis of dynamic MRI requires robust alignment across time in the presence of substantial and unpredictable motion. We make a Markov assumption on the nature of deformations to take advantage of the temporal structure in the image data. Forward message passing in the corresponding hidden Markov model (HMM) yields an estimation algorithm that only has to account for relatively small motion between consecutive frames. We demonstrate the utility of the temporal model by showing that its use improves the accuracy of the segmentation propagation through temporal registration. Our results suggest that the proposed model captures accurately the temporal dynamics of deformations in in-utero MRI time series.

PMID:
28417113
PMCID:
PMC5391876
DOI:
10.1007/978-3-319-46726-9_7
[Indexed for MEDLINE]
Free PMC Article

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