Improved Complex Convolutional Neural Network Based on SPIRiT and Dense Connection for Parallel MRI Reconstruction

Table 1

The symbols used in Algorithm 1.

Parameter	Value
The fully sampled MR image
The MR image to be reconstructed
The k-space data to be reconstructed
The undersampled k-space data
The SPIRiT calibration kernel
The operator that selects the nonacquired points
The operator that puts the acquired points back
The operator that puts the nonacquired points back
The convolution units
The dense concatenation operation