Terahertz Computed Tomography takes the advantages of not only high resolution in space and density without image
overlap but also the capability of being directly used in digital processing and spectral analysis, which determine it to be
a good choice in parameter detection for process control. But Diffraction and scattering of THz wave will obfuscate or
distort the reconstructed image. In order to find the most effective reconstruction method to build THz CT model.
Because of the expensive cost, a fan-shaped THz CT industrial detection system scanning model, which consists of 8
emitters and 32 receivers, is established based on studying infrared CT technology. The model contains control and
interface, data collecting and image reconstruction sub-system. It analyzes all the sub-function modules then reconstructs
images with algebraic reconstruction algorithm. The experimental result proves it to be an effective, efficient algorithm
with high resolution and even better than back-projection method.
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