Temporal Registration in In-Utero Volumetric MRI Time Series

Autor:	Liao, Ruizhi, Turk, Esra, Zhang, Miaomiao, Luo, Jie, Grant, Ellen, Adalsteinsson, Elfar, Golland, Polina
Rok vydání:	2016
Předmět:	Computer Science - Computer Vision and Pattern Recognition
Druh dokumentu:	Working Paper
Popis:	We present a robust method to correct for motion and deformations for 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. Comment: to appear in International Conference on Medical Image Computing and Computer Assisted Intervention, 2016
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1608.03907 Zobrazit plný text záznamu View this record from Arxiv