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About Monitored Tomographic Reconstruction

© 2022 М. V. Chukalinaa,b, А. S. Ingachevab,c, K. B. Bulatovb,d, K. О. Kutukovae, E. Zscheche, V. V. Arlazarovb,d

aFSRC Cristallograhy and photonics 119333 Moscow, Leninskii prospect, 59, Russia
bSmart Engines Service 117312 Moscow, pr. 60-letiya Oktyabrya, 9, Russia
cInstitute for Information Transmission Problems of the Russian Academy of Sciences (Kharkevich Institute) 127051 Moscow, Bolshoi karetnii., 19, Russia
dFederal Research Center “Computer Science and Control” of Russian Academy of Sciences 117312 Moscow, pr. 60-letiya Oktyabrya, 9, Russia
edeepXscan GmbH, Dresden, Germany

Received 14 Jan 2022

X-ray tomography is widely used in medicine, industry, customs control and, of course, in scientific research studies as a non-destructive method for visualizing the internal morphological structure of probed objects. Each application imposes its own limitations on the method. Thus, medical applications require limiting the dose load, and use at customs requires a reduction in inspection time. Recently, the authors proposed a fundamentally new approach to working with tomographic data, called monitored reconstruction. The proposed approach differs from the classical two-stage “projection collecting according to a given protocol and then reconstruction”. In monitored approach the reconstruction of a digital image begins after the first few projections (package of projections) are taken, the next step is to analyze the intermediate result and automatically decide to continue measuring the next “package” of projections or consider the result as final, and stop the process. The article discusses in detail the basic principles of the monitored approach, determines the function of total losses, the cost of reconstruction error, the cost of observations. The parameters that affect the formula of the observation cost function depend on the field of method application. The results of a model monitored experiment with projections collected on a tomographic setup with nanometer resolution were analyzed. It is shown that the application of the monitored reconstruction approach to the data allowed us to reduce the number of required projections by 10% on average to achieve a 5% deviation from the “exact” answer, compared with the case of the classical two-stage approach.

Key words: X-ray tomography, two-stage reconstruction, monitored reconstruction, cost of observation, total loss function

DOI: 10.31857/S0235009222020032

Cite: Chukalina М. V., Ingacheva А. S., Bulatov K. B., Kutukova K. О., Zschech E., Arlazarov V. V. O monitoringovom podkhode k tomograficheskoi rekonstruktsii [About monitored tomographic reconstruction]. Sensornye sistemy [Sensory systems]. 2022. V. 36(2). P. 183–193 (in Russian). doi: 10.31857/S0235009222020032


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