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A Confocal Collimator for Radionuclide Diagnostics and X-Ray Fluorescence Analysis

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Abstract—

The use of a special device that limits the field of view of a detector, i.e., a confocal collimator, is one of the approaches to obtaining information about the spatial distribution of the detected material in the methods for radionuclide diagnostics (in medicine) and X-ray fluorescence analysis (in material science). This device is a monolithic construction with a large number of straight channels whose axes are directed towards a single point that is the focus of the confocal collimator. The possibility of fabricating confocal collimators using 3D printing technology is demonstrated. The advantages of 3D printing are simplicity, reliability, and wide availability. It is shown that the use of a confocal collimator in radionuclide diagnostics instead of a single-channel collimator is advantageous, since it substantially increases the sensitivity (by 2−7 times) with the simultaneous improvement of the resolution (approximately by 9 times). The applicability of the confocal collimator for determining the depth of occurrence of a radiation source, i.e., for measuring the three-dimensional distribution of the emitting (fluorescent) substance, is also demonstrated.

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ACKNOWLEDGMENTS

We thank A.P. Naumov for his help in developing the prototype of confocal collimator.

Funding

This work was supported in part by the Russian Foundation for Basic Research (project nos. 19-01-00790, 17-29-03492, and 18-29-26019).

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Authors and Affiliations

  1. Institute of Microelectronics Technology and High Purity Materials, Russian Academy of Sciences, 142432, Chernogolovka, Moscow oblast, Russia

    S. I. Zaitsev, O. V. Trofimov & Ya. L. Shabelnikova

  2. Institute for Information Transmission Problems, Russian Academy of Sciences, 127051, Moscow, Russia

    M. V. Chukalina

  3. Shubnikov Institute of Crystallography, Crystallography and Photonics Federal Research Center, Russian Academy of Sciences, 119333, Moscow, Russia

    M. V. Chukalina

Authors
  1. S. I. Zaitsev
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  2. O. V. Trofimov
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  3. Ya. L. Shabelnikova
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  4. M. V. Chukalina
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Corresponding authors

Correspondence to S. I. Zaitsev or Ya. L. Shabelnikova.

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Translated by N. Goryacheva

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Zaitsev, S.I., Trofimov, O.V., Shabelnikova, Y.L. et al. A Confocal Collimator for Radionuclide Diagnostics and X-Ray Fluorescence Analysis. Instrum Exp Tech 63, 425–429 (2020). https://doi.org/10.1134/S0020441220030203

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  • DOI: https://doi.org/10.1134/S0020441220030203

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