Symmetric Block-Matching Registration for the Distortion Correction of Echo-Planar Images

Renaud Hedouin (1) , Olivier Commowick (1) , Maxime Taquet (2, 3) , Elise Bannier (4, 1) , Benoit Scherrer (3) , Simon K. Warfield (3) , Christian Barillot (1)

1 VisAGeS - Vision, Action et Gestion d'informations en Santé
2 ICTEAM - Institute of Information and Communication Technologies, Electronics and Applied Mathematics
3 CRL - Computational Radiology Laboratory [Boston]
4 Département de Radiologie [CHU de Rennes]

We introduce a new approach to correct geometric and in- tensity distortion of Echo Planar Images (EPI) from images acquired with opposite phase encoding directions. A new symmetric block-matching registration algorithm has been developed for this purpose relying on new adapted transfor- mations between blocks and a symmetric optimization scheme to ensure an opposite symmetric transformation. We present results of our algorithm showing its ability to robustly re- cover EPI distortion while obtaining sharper results than the popular TOPUP algorithm.

Domaines: Neurosciences [q-bio.NC]

Renaud Hedouin, Olivier Commowick, Maxime Taquet, Elise Bannier, Benoit Scherrer, et al.. Symmetric Block-Matching Registration for the Distortion Correction of Echo-Planar Images. IEEE International Symposium on Biomedical Imaging (ISBI), Apr 2015, New York, United States. pp.717-720. ⟨inserm-01118766⟩