MRI (Magnetic Resonance Imaging) rapid reconstruction technology for fusing multi-scale features based on cross domain cascade

The invention relates to an MRI (Magnetic Resonance Imaging) rapid reconstruction technology based on cross domain cascading and fusing multi-scale features. The problems of lack of frequency domain information, single model architecture and neglect of branch reconstruction importance in the prior art are solved. A method of combining a frequency domain and an image domain is adopted, a single domain is optimized to be a cross domain, a single framework is optimized to be a cascade framework, original reconstruction of only one model is changed into reconstruction of a plurality of models, a feature extraction branch and a reconstruction branch are connected in a data splicing mode, and the feature extraction branch and the reconstruction branch are combined into a U-shaped structure. The method has the advantages of being good in model performance, high in reconstructed image quality and short in MRI scanning time. 本发明是一种基于交叉域级联的融合多尺度特征的MRI快速重建技术。解决现有技术缺乏频率域信息、模型架构单一与忽视重建分支重要性的问题。采取频率域与图像域结合的方法，将单一域优化为交叉域，将单