Field Map Constrained Nonrigid Registration Method for Correction of Distortions in EP Images
Li Y, Xu N, Fitzpatrick J, Morgan V, Pickens D, Dawant B
Image post-processing techniques have been widely used in distortion correction for Echo Planar (EP) images. Two main strategies among them are field map and nonrigid registration methods. The combination of these two methods has not yet been investigated. Here, we use a measured field map as a constraint for the registration process and we utilize nonrigid registration to compensate inaccuracies in field map measurements. The proposed methodology is demonstrated on simulated images and on a real EP image of a phantom.