Novel ICL (industrial computed laminography) system and implementation method

Abstract

The invention relates to a novel ICL (industrial computed laminography) system and belongs to the field of laminated imaging of computers. The system comprises a radiation source, a flat panel detector, a to-be-detected sample and a platform, wherein the radiation source is fixed on the platform, the flat panel detector and the to-be-detected sample linearly move in parallel in the same direction, besides, the flat panel detector rotates synchronously in the scanning process, so that the flat panel detector is always perpendicular to the central ray of the radiation source in the data acquisition process of the system. The invention further relates to an implementation method of the novel ICL system. The method comprises steps as follows: an imaging model is established; an iterative reconstruction algorithm is adopted. The novel ICL system is simple in structure, low in cost and high in implementability and can be used for nondestructive testing of large-size platy components.

Description

technical field [0001] The invention belongs to the field of computer layered imaging, and relates to a novel ICL system and a realization method. Background technique [0002] Computed Tomography (CT) is a relatively mature non-destructive testing technology, which can effectively image and analyze the internal structure of objects, and has been widely used in industry, medicine, aviation and other fields. In a typical fan-beam industrial CT system, the sample to be tested is placed on a turntable between the X-ray tube and the flat panel detector, and the X-rays generated by the X-ray tube are collected and stored by the detector after being attenuated by the object. At least 180° projection data are required to obtain a reconstructed image through the thin slice of the sample. Obtaining 180-degree projection data is nearly impossible for oversized components due to geometric constraints. At the same time, for plate-shaped components whose length and width are much large...

AI Technical Summary

Problems solved by technology

But it has some shortcomings: 1) The curvature of the C-arm of the system is determined, and the position of the ray source is fixed, resulting in the distance S between the system ray source and the track of the flat panel detector. D It is not adjustable, so the field of view (Field of View, FOV) is not variable, resulting in low system flexibility; 2) The manufacture of high-precision C-arms is complicated and costly; although these systems have been widely used in medical and industrial applications Good results, however none of them focus on system structure complexity, cost, etc.

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