Abstract
X-ray tomography becomes a wide-spread non-destructive testing method. Flexibility of the reconstruction algorithms makes possible to apply 3D tomographic analysis to complex mechanisms and systems and detect defects of different types. For instance, this opportunity allows to solve geometrical problem, when the size of the investigating sample exceeding dimensions of the setup. This paper proposes to use non-standard geometry of tomographic scanning and backprojection algorithm optimized for this case to solve previously mentioned problem. Producing and assembling of complex space systems and mechanics requires the testing procedure at each step of the technological process: for separate parts of mechanism as well as for assembled system or device. Presented approach prospectively fits for this task.
Highlights
One of the most important advantages of CT measurements is the opportunity to obtain detailed 3D visualization of the sample including its internal structure, which is the way to detect defects: cracks, pores, splits etc
The standard filtered backprojection algorithm becomes applicable for the reconstruction of the certain part of the sample depending on the type of beam: parallel, fan or cone
Optimization and adaptation of filtered backprojection algorithms are the way of building the X-ray setup for the scanning of such objects
Summary
One of the most important advantages of CT measurements is the opportunity to obtain detailed 3D visualization of the sample including its internal structure, which is the way to detect defects: cracks, pores, splits etc. The standard geometry of the tomographic scanning (Figure 1) requires full or limited coverage of the sample by the beam in condition of matching the optical axis of the detector with the center of the sample rotation [1]. The standard filtered backprojection algorithm becomes applicable for the reconstruction of the certain part of the sample depending on the type of beam: parallel, fan or cone. Approaches of the tomographic scanning of the object with sizes, which are bigger, than the dimensions of X-ray setup are still developing. Optimization and adaptation of filtered backprojection algorithms are the way of building the X-ray setup for the scanning of such objects
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