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Terahertz spatio-temporal deep learning computed tomography
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DOI：10.1364/OE.461439.png)
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摘要
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Terahertz computed tomography (THz CT) has drawn significant attention because of its unique capability to bring multi-dimensional object information from invisible to visible. However, current physics-model-based THz CT modalities present low data use efficiency on time-resolved THz signals and low model fusion extensibility, limiting their application fields' practical use. In this paper, we propose a supervised THz deep learning computed tomography (THz DL-CT) framework based on time-domain information. THz DL-CT restores superior THz tomographic images of 3D objects by extracting features from spatio-temporal THz signals without any prior material information. Compared with conventional and machine learning based methods, THz DL-CT delivers at least 50.2%, and 52.6% superior in root mean square error (RMSE) and structural similarity index (SSIM), respectively. Additionally, we have experimentally demonstrated that the pretrained THz DL-CT model can generalize to reconstruct multi-material systems with no prerequisite information. THz CT through the DL data fusion approach provides a new pathway for non-invasive functional imaging in object investigation. (c) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
Keyword:
CARRIER DYNAMICS
IDENTIFICATION
SPECTROSCOPY
期刊
IF:
3.3
论文数:
6.1W
被引数:
14.3W
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