Abstract
Cherenkov-excited luminescence scanned tomography (CELST) can recover a high-resolution 3D distribution of luminescent sources within tissue. However, reconstructing the distribution of the quantum field from boundary measurements is a typical ill-posed problem. In this work, we propose a novel two-step reconstruction network (TSR-Net) based on a fusion mechanism, that integrates two encoder-decoder networks (ED-Net) using a concatenation block. Firstly, an ED-Net is trained to learn the CT structural features of tissues with the measured data. Then, the trained ED-Net is fixed and cascaded by another ED-Net for a second-step training to predict the 3D distributions. Numerical simulations reveal that the proposed approach can not only accurately reconstruct the intensity values of the luminescent sources, but also achieve a reconstruction resolution of 1mm with low target-background contrast. Furthermore, the well-trained network is still effective in the reconstruction of tissues with different shapes, which indicates an excellent generalization ability of the algorithm.
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This paper is supported by the Project for the National Natural Science Foundation of China (82171992, 62105010).
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Zhang, W., Feng, J., Li, Z., Sun, Z., Jia, K. (2023). TSR-Net: A Two-Step Reconstruction Approach for Cherenkov-Excited Luminescence Scanned Tomography. In: Yongtian, W., Lifang, W. (eds) Image and Graphics Technologies and Applications. IGTA 2023. Communications in Computer and Information Science, vol 1910. Springer, Singapore. https://doi.org/10.1007/978-981-99-7549-5_3
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