Accelerated imaging Algorithms Artefact reduction Artifacts Auto calibration Backpropagation Calibration signal Convolution Convolutional neural network Convolutional neural networks Errors Generalized auto-calibrating partially parallel acquisitions Image Processing, Computer-Assisted Image enhancement Image reconstruction Images reconstruction K-space Magnetic Resonance Imaging Magnetic resonance imaging Mean square error Neural Networks, Computer Parallel imaging Physics Reconstruction techniques accelerated imaging acceleration algorithm article artifact artifact reduction