INTELLIGENT SYSTEMS AND TECHNOLOGIES

On the problem of accuracy assessment in computed tomography

M. V. Chukalina<sup>ab

a</sup> Smart Engines Service LLC, Moscow, Russia
^b Federal Research Center "Computer Science and Control" of Russian Academy of Sciences, Moscow, Russia

Abstract: The computed tomography method allows determining the internal structure of objects without physically destroying these objects. The method is used to determine the structure of unknown objects, conduct flaw detection or metrological control of products, etc. Tomographic reconstruction algorithms are used to construct a digital image of an object from a set of X-ray projections collected from different angles. Different applications of tomography (study the structure, flaw detection, testing, etc.) dictate different requirements for the accuracy of reconstruction. As the measuring and computing parts improve, tomographic systems continue to expand their areas of application. Organization of multi-scale measurements in a single device, shooting both the product as a whole and its individual parts from different angles, requires automatic methods for finding the boundaries of the parts of interest, determining their position in the volume in order to accurately position the source-optics-detector trinity relative to the areas of interest. The requirements for the placement of set-up parts additionally increase the requirements for the accuracy of reconstruction. In this paper, the problem of estimating the accuracy of reconstruction depending on the purpose of the tomograph usage under specified restrictions on time or dose load is formulated.

Keywords: computed tomography, reconstruction algorithms, reconstruction accuracy, structural similarity, flaw detection, metrology.

DOI: 10.14357/20718632250201

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