PET Image Reconstruction with Multiple Kernels and Multiple Kernel Space Regularizers

no code implementations • 4 Mar 2021 • Shiyao Guo, Yuxia Sheng, Shenpeng Li, Li Chai, Jingxin Zhang

To reduce the reconstruction error and the sensitivity to iteration number, we present a general class of multi-kernel matrices and two regularizers consisting of kernel image dictionary and kernel image Laplacian quatradic, and use them to derive the single-kernel regularized EM and multi-kernel regularized EM algorithms for PET image reconstruction.

Dictionary Learning Image Reconstruction