Disclosed herein is a medical instrument (100, 300) comprising a memory (110) storing machine executable instructions (120), a convolutional neural network (122, 122', 122", 122'''), and a compressed sensing data-consistency module (124). The convolutional neural network is configured to output a de-noised magnetic resonance image (132) in response to inputting an input magnetic resonance image (130) and is a multiscale deep neural network. Execution of the machine executable instructions causes the processor to provide a reconstructed magnetic resonance image (136) reconstructed from measured k-space data (126) by iteratively using the convolutional neural network and the compressed sensing data-consistency module to implement a magnet resonance imaging compressed sensing reconstruction.
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