Research on the hybrid scanning computed laminography
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TP391 TH74

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    Abstract:

    For the imaging of plate-like objects, the computed laminography ( CL) technology has been widely used because of its nondestructive and intuitive characteristics. CL imaging methods are mainly divided into linear scanning and circular scanning. Linear scanning has high efficiency, and circular scanning has good data uniformity. However, due to the incomplete projection data of both methods, there are problems of sliced image aliasing and unclear image edge. In this article, a hybrid scanning CL (HyCL) imaging method is proposed, which consists of linear scanning and circular scanning. The geometric model is formulated, the simulation and imaging experiments are implemented by using SIRT image reconstruction algorithm, the imaging effect and in-slice aliasing is analyzed. Compared with parallel translation computed laminography ( PTCL), orthogonal translation computed laminography ( OTCL) and rotational computed laminography (RCL), results show that HyCL can effectively reduce aliasing artifacts and protect details. The image contour can be retained clearly and evenly, and the contrast is better.

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  • Received:
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  • Online: July 04,2023
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