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Image reconstruction for the coded aperture system in nuclear safety and security using a Monte Carlo-based system matrix

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Abstract

Purpose

Accurate localization of radioactive materials is critical to nuclear safety and nuclear security. A coded aperture imaging system provides a visualization solution. However, the correlation method has poor reconstruction performance for sources with low counts and for extended sources.

Methods

In this study, a Monte Carlo optimization-based MLEM algorithm (MC-MLEM) is proposed. The system matrix was obtained by accurate Monte Carlo simulation, so the physical effects such as mask penetration that affect the imaging process were taken into account in the MLEM algorithm. In the simulation process, the normalization of the system matrix was realized by controlling the source at different position of the source plane to have the same activity and emission angle.

Results

The experimental results showed that compared with the correlation method, the MC-MLEM algorithm could improve the signal-to-noise ratio and angular resolution and locate the source position quickly and accurately under low count conditions. Furthermore, the MC-MLEM algorithm could reconstruct the shape of the extended source and the expected activity ratio of cold-hot sources with large activity differences.

Conclusion

The MC-MLEM algorithm improved the imaging results and enhanced the reconstruction performance.

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References

  1. M.J. Cieślak, K.A.A. Gamage, R. Glover, Coded-aperture imaging systems: past, present and future development—A review. Radiat. Meas. 92, 59–71 (2016)

    Article  Google Scholar 

  2. K. Amgarou et al., A comprehensive experimental characterization of the iPIX gamma imager. J. Instrum. 11, P08012–P08012 (2016)

    Article  Google Scholar 

  3. O. Gal et al., Development of a portable gamma camera with coded aperture. Nucl. Instrum. Methods Phys. Res. Sect. A Accel. Spectrom. Detect. Assoc. Equip. 563, 233–237 (2006)

    Article  ADS  Google Scholar 

  4. A.L. Mladenov, D. Stankov, T.Z. Nonova, K. Krezhov, Radiation protection, radioactive waste management and site monitoring at the nuclear scientific experimental and educational centre irt-sofia at inrne-bas. Radiat. Prot. Dosimetry 162, 176–181 (2014)

    Article  Google Scholar 

  5. L. Caballero et al., Gamma-ray imaging system for real-time measurements in nuclear waste characterisation. J. Instrum. 13, P03016–P03016 (2018)

    Article  Google Scholar 

  6. E. Furuta, Semi-quantitative analysis of leaf surface contamination by radioactivity from the Fukushima Daiichi nuclear power plant accident using HPGe and imaging plate. J. Radioanal. Nucl. Chem. 297, 337–342 (2013)

    Article  Google Scholar 

  7. C.G. Wahl et al., The Polaris-H imaging spectrometer. Nucl. Instrum. Methods Phys. Res. Sect. A Accel. Spectrom. Detect. Assoc. Equip. 784, 377–381 (2015)

    Article  ADS  Google Scholar 

  8. R.W. Todd, J.M. Nightingale, D.B. Everett, A proposed γ camera. Nature 251, 132–134 (1974)

    Article  ADS  Google Scholar 

  9. A. Haboub, A.A. Macdowell, S. Marchesini, D.Y. Parkinson, Coded aperture imaging for fluorescent x-rays. Rev. Sci. Instrum. 85, 063704–063704 (2014)

    Article  ADS  Google Scholar 

  10. T. Collaboration. Lhc. Precision luminosity measurements at LHCb. J. Instrum. 9, P12005–P12005 (2014)

  11. A. Zoglauer, M. Galloway, M. Amman, P.N. Luke, S.E. Boggs, Aerial standoff detection with the High Efficiency Multimode Imager (HEMI). In: IEEE nuclear science symposuim & medical imaging conference 566–570 (2010). doi:https://doi.org/10.1109/NSSMIC.2010.5873824

  12. M.A. Alnafea, K. Wells, M. Guy, N.M. Spyrou, Near field corrections for coded aperture imaging in scintimammography. In: 2006 IEEE nuclear science symposium conference record. 5, 2948–2953 (2006)

  13. M. Jeong, B. Van, B.T. Wells, L.J. Dries, M.D. Hammig, Comparison between pixelated scintillators: CsI(Tl), LaCl 3(Ce) and LYSO(Ce) when coupled to a silicon photomultipliers Array. Nucl. Instrum. Methods Phys. Res. Sect. A Accel. Spectrom. Detect. Assoc. Equip. 893, 75–83 (2018)

    Article  ADS  Google Scholar 

  14. E.E. Fenimore, T.M. Cannon, Coded aperture imaging with uniformly redundant arrays. Appl. Opt. 17, 337–347 (1978)

    Article  ADS  Google Scholar 

  15. L.A. Shepp, Y. Vardi, Maximum likelihood reconstruction for emission tomography. IEEE Trans. Med. Imaging 1, 113–122 (1982)

    Article  Google Scholar 

  16. D. Lazaro, Z.E. Bitar, V. Breton, D. Hill, I. Buvat, Fully 3D Monte Carlo reconstruction in SPECT: a feasibility study. Phys. Med. Biol. 50, 3739–3754 (2005)

    Article  Google Scholar 

  17. M. Rafecas, et al. Use of a Monte-Carlo based probability matrix for 3D iterative reconstruction of MADPET-II data. In: 2003 IEEE Nuclear Science Symposium. Conference Record (IEEE Cat. No.03CH37515). 3, 1775–1779 (2003)

  18. S. Shokouhi, et al. Statistical 3D image reconstruction for the RatCAP PET tomograph using a physically accurate, Monte Carlo based system matrix. In: IEEE symposium conference record nuclear science 2004. 6, 3901–3905 (2004)

  19. K. Li et al., A new virtual ring-based system matrix generator for iterative image reconstruction in high resolution small volume PET systems. Phys. Med. Biol. 60, 6949–6973 (2015)

    Article  Google Scholar 

  20. M. Jeong, M.D. Hammig, Comparison of gamma ray localization using system matrixes obtained by either MCNP simulations or ray-driven calculations for a coded-aperture imaging system. Nucl. Instrum. Methods Phys. Res. Sect. A Accel. Spectrom. Detect. Assoc. Equip. 954, 161353 (2020)

    Article  Google Scholar 

  21. Q. Liu et al., Image reconstruction using multi-energy system matrices with a scintillator-based gamma camera for nuclear security applications. Appl. Radiat. Isot. 163, 109217 (2020)

    Article  Google Scholar 

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (No. 11905229).

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Authors and Affiliations

  1. Bei**g Engineering Research Center of Radiographic Techniques and Equipment, Institute of High Energy Physics, Chinese Academy of Sciences, Bei**g, 100049, China

    Yue Yu, **aoli Sun, Zhiming Zhang, Shuangquan Liu, **uzuo Liang, Daowu Li, Lei Shuai, Tingting Hu & Long Wei

  2. School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Bei**g, 100049, China

    Yue Yu, **aoli Sun, Zhiming Zhang & Long Wei

  3. **an Laboratory of Applied Nuclear Science, **an, 250131, China

    **aoli Sun, Zhiming Zhang, Shuangquan Liu, Tingting Hu & Long Wei

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  1. Yue Yu
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Correspondence to Long Wei.

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On behalf of all authors, the corresponding author Long Wei states that there is no conflict of interest.

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Yu, Y., Sun, X., Zhang, Z. et al. Image reconstruction for the coded aperture system in nuclear safety and security using a Monte Carlo-based system matrix. Radiat Detect Technol Methods 7, 263–270 (2023). https://doi.org/10.1007/s41605-023-00381-5

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  • DOI: https://doi.org/10.1007/s41605-023-00381-5

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