2021/05/26 by Zhou Chen, Jinxi Xiang, Chen, Zhou +5 · 3 citations
Engineering · #Electrical and Bioimpedance Tomography #FOS: Electrical engineering #Flow Measurement and Analysis #Image and Video Processing (eess.IV) #Non-Destructive Testing Techniques #electronic engineering #information engineering
paper · doi:10.48550/arxiv.2105.12474
openalex publication_date 2021/05/26 · openalex created_date 2022/07/25 · openalex updated_date 2026/07/28
Multi-frequency Electrical Impedance Tomography (mfEIT) is an emerging biomedical imaging modality to reveal frequency-dependent conductivity distributions in biomedical applications. Conventional model-based image reconstruction methods suffer from low spatial resolution, unconstrained frequency correlation and high computational cost. Deep learning has been extensively applied in solving the EIT inverse problem in biomedical and industrial process imaging. However, most existing learning-based approaches deal with the single-frequency setup, which is inefficient and ineffective when extended to address the multi-frequency setup. In this paper, we present a Multiple Measurement Vector (MMV) model based learning algorithm named MMV-Net to solve the mfEIT image reconstruction problem. MMV-Net takes into account the correlations between mfEIT images and unfolds the update steps of the Alternating Direction Method of Multipliers (ADMM) for the MMV problem. The non-linear shrinkage operator associated with the weighted l21 regularization term is generalized with a cascade of a Spatial Self-Attention module and a Convolutional Long Short-Term Memory (ConvLSTM) module to capture intra- and inter-frequency dependencies. The proposed MMVNet was validated on our Edinburgh mfEIT Dataset and a series of comprehensive experiments. All reconstructed results show superior image quality, convergence performance and noise robustness against the state of the art.