k-space based reconstruction method for wave encoded bSSFP sequence

Purpose: To propose a parallel MRI model of wave encoded 2D bSSFP sequence k-space reconstruction based on SPIRiT. Theory and Methods: It is an advantage that MRI images are more stable in k-space reconstruction than in image domain reconstruction. Therefore, SPIRiT method is used to improve the stability of the reconstructed image. In addition, simulation experiments are carried out to further observe the reconstruction effect of wave encoded bSSFP sequence based on SPIRiT. In vivo experiments, compare the wave 2D bSSFP sequence reconstructed based on SPIRiT with the general bSSFP sequence. Results: Simulation and in vivo experiments show that in the reconstruction process of wave encoded bSSFP sequence, compared with the general bSSFP sequence, the g-factor decreased. Based on SPIRiT reconstruction method can reconstruct a stable and good image under 4-fold acceleration by using simpler empirical selection parameters. Conclusion: For the wave encoded bSSFP sequence, the reconstruction model based on SPIRiT avoids the problem of decreasing the reconstruction robustness due to inaccurate sensitivity estimation. The imaging uniformity is good and has good research value.