Parallel Mri Reconstruction: A Filter-Bank Approach

Parallel magnetic resonance imaging (MRI) using multi-channel receiver coils has emerged as an effective tool to reduce imaging time in various MRI applications. However, there are still a number of image reconstruction issues that have not been fully addressed, thereby limited the level of speed enhancement achievable with the technology. This paper reformulates the image reconstruction problem as a digital filter bank problem (in contrast to the conventional matrix formulation used in the popular SENSE technique) and develops an effective algorithm to handle the ill-conditioned problem often encountered in image reconstruction. Simulations based on an eight-channel configuration demonstrate that the proposed method is superior to the SENSE reconstruction especially when large acceleration factors are used