Super Resolution of MRI Using Improved IBP

An approach for improving the z-axis resolution of MRI using super resolution (SR) technology in the post processing step is proposed. The 2D multi-slice MRI is often anisotropic, the z-resolution lower than the in plane resolution. And the isotropic is necessary for certain diagnostic while the truly isotropic image is hardly obtained. In this case the super resolution is an efficiency post-processing approach to obtain the demand image. In this method, the imaging volume is acquired multiple times with small spatial shifts in z-axis. We use an algorithm which introduces the Papoulis-Gerchberg extrapolation within the Iterative back-projection method to process the shift image serials. Experiments demonstrate that better edge definition in the slice select direction and signal to noise efficiency are obtained.