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Method for obtaining and dual-energy processing of X-ray sinograms for identifying low-contrast ubstances in CT using sources with a continuous radiation spectrum
A.A. Komarskiy 1, S.R. Korzhenevskiy 1, V.V. Krinitsin 1

1 Institute of Electrophysics of the Ural Branch of the Russian Academy of Sciences,
Amundsen St. 106, Ekaterinburg, 620110, Russia

 PDF, 2205 kB

DOI: 10.18287/2412-6179-CO-1485

Pages: 282-291.

Full text of article: Russian language.

Abstract:
The article proposes and implements a method of dual-energy CT. The method allows the contrast-enhanced differentiation of one substance from another when substances have similar chemical compositions and densities. In this case, the use of standard dual-energy CT methods does not allow the unambiguous identification of the desired substance. This is because X-ray sources emit non-monochromatic radiation, and changes in object thickness lead to significant absorption of low-energy radiation. The article justifies the use of a design solution to reduce the influence of variable object thickness on the absorption of low-energy X-ray radiation. This allows dual-energy transformation to be performed not for CT slices but for sinograms obtained at different energy spectra of X-ray radiation. After reconstructing the dual-energy sinogram on a CT slice, the desired substance is unambiguously identified. The successful implementation of this method is demonstrated in the example of beryl particles embedded in muscovite. In CT slices obtained after reconstructing dual-energy sinograms, beryl particles with sizes as small as 1 mm are clearly distinguished with a total sample thickness of 30 mm.

Keywords:
dual-energy CT, image processing, dual-energy processing, sinogram, x-ray image, beryl.

Citation:
Komarskiy AA, Korzhenevskiy SR, Krinitsin VV. Method for obtaining and dual-energy processing of X-ray sinograms for identifying low-contrast ubstances in CT using sources with a continuous radiation spectrum. Computer Optics 2025; 49(2): 282-291. DOI: 10.18287/2412-6179-CO-1485.

Acknowledgements:
The investigation was funded by the Russian Science Foundation (RSF) under project No. 22-79-10013.

References:
  1. Johnson TR. Dual-energy CT: general principles. Am J Roentgenol 2012; 199(5): 3-8. DOI: 10.2214/AJR.12.9116.
  2. R, De Man B, Gupta R. Dual energy computed tomography: physical principles, approaches to scanning, usage, and implementation: Part 1. Neuroimaging Clin N Am 2017; 27(3): 371-384. DOI: 10.1016/j.nic.2017.03.002.
  3. Forghani R, De Man B, Gupta R. Dual energy computed tomography: physical principles, approaches to scanning, usage, and implementation: Part 2. Neuroimaging Clin N Am 2017; 27(3): 385-400. DOI: 10.1016/j.nic.2017.03.003.
  4. Aran S, Shaqdan KW, Abujudeh HH. Dual-energy computed tomography (DECT) in emergency radiology: basic principles, techniques, and limitations. Emerg Radiol 2014; 21(4): 391-405. DOI: 10.1007/s10140-014-1208-2.
  5. Hounsfield GN. Computerized transverse axial scanning (tomography): Part 1. Description of system. Br J Radiol 1973; 46(552): 1016-1022. DOI: 10.1259/0007-1285-46-552-1016.
  6. Schmidt B, Flohr T. Principles and applications of dual source CT. Phys Med 2020; 79: 36-46 DOI: 10.1016/j.ejmp.2020.10.014.
  7. Pinho DF, Kulkarni NM, Krishnaraj A, Kalva SP, Sahani DV. Initial experience with single-source dual-energy CT abdominal angiography and comparison with single-energy CT angiography: image quality, enhancement, diagnosis and radiation dose. Eur Radiol 2013; 23(2): 351-359. DOI: 10.1007/s00330-012-2624-x.
  8. Ohira S, Ikawa T, Kanayama N, Minamitani M, Kihara S, Inui S, Ueda Y, Miyazaki M, Yamashita H, Nishio T, Koizumi M, Nakagawa K, Konishi K. Dual-energy computed tomography-based iodine concentration as a predictor of histopathological response to preoperative chemoradiotherapy for pancreatic cancer. J Radiat Res 2023; 64(6): 940-947. DOI: 10.1093/jrr/rrad076.
  9. Oda S, Emoto T, Nakaura T, Kidoh M, Utsunomiya D, Funama Yo, Nagayama Ya, Takashio S, Ueda M, Yamashita T, Tsujita K, Ando Yu, Yamashita Ya. Myocardial late iodine enhancement and extracellular volume quantification with dual-layer spectral detector dual-energy cardiac CT. Radiol Cardiothorac Imaging 2019; 1(1): e180003. DOI: 10.1148/ryct.2019180003.
  10. Ashoor M, Asgari A, Khorshidi A, Rezaei A. Evaluation of Compton attenuation and photoelectric absorption coefficients by convolution of scattering and primary functions and counts ratio on energy spectra. Indian J Nucl Med 2015; 30(3): 239-247. DOI: 10.4103/0972-3919.158532.
  11. Bolus DN. Dual-energy computed tomographic scanners: principles, comparisons, and contrasts. J Comput Assist Tomogr 2013; 37(6): 944-947. DOI: 10.1097/RCT.0000000000000028.
  12. Cellina M, Bausano MV, Pais D, Chiarpenello V, Costa M, Vincenzo Z, Cè M, Martinenghi C, Oliva G, Carrafiello G. Dual-energy CT applications in urological diseases. Appl Sci 2023; 13(13): 7653. DOI: 10.3390/app13137653.
  13. Roele ED, Timmer VCML, Vaassen LAA, Kroonenburgh AMJL, Postma AA. Dual-energy CT in head and neck imaging. Curr Radiol Rep 2017; 5(5): 19. DOI: 10.1007/s40134-017-0213-0.
  14. Tonai S, Kubo Y, Tsang MY, Bowden S, Ide K, Hirose T, Kamiya N, Yamamoto Y, Yang K, Yamada Y, Morono Y, Heuer VB, Inagaki F, Expedition 370 Scientists. A new method for quality control of geological cores by X-ray computed tomography: Application in IODP expedition 370. Front Earth Sci 2019; 7: 117. DOI: 10.3389/feart.2019.00117.
  15. Bauer C, Wagner R, Orberger B, Firsching M, Ennen A, Pina CG, Wagner C, Honarmand M, Nabatian G, Monsef I. Potential of dual and multi energy XRT and CT analyses on iron formations. Sensors 2021; 21(7): 2455. DOI: 10.3390/s21072455.
  16. Firsching M, Nachtrab F, Uhlmann N, Hanke R. Multi-Energy X-ray imaging as a quantitative method for materials characterization. Adv Mater 2011; 23(22-23): 2655-2656. DOI: 10.1002/adma.201004111.
  17. Rebuffel V, Dinten JM. Dual-energy X-ray imaging: benefits and limits. Insight: Non-Destr Test Cond Monit 2007; 49(10): 589-594. DOI: 10.1784/insi.2007.49.10.589.
  18. Firsching M, Nachtrab F, Mühlbauer J, Uhlmann N. Detection of enclosed diamonds using dual energy X-ray imaging. NDT.net 2012: 17(7): 1-7. Source: <https://www.ndt.net/article/wcndt2012/papers/397_wcndtfinal00397.pdf>.
  19. Dean PJ, Male JC. Some properties of the visible luminescence exited in diamond by irradiation in the fundamental absorption edge. J Phys Chem Solids 1964; 25(12): 1369-1383. DOI: 10.1016/0022-3697(64)90052-6.
  20. Calas G, Petiau J, Manceau A. X-ray absorption spectroscopy of geological materials. J Phys Colloq 1986; 47(C8): 813-818. DOI: 10.1051/jphyscol:19868156.
  21. Komarskiy A, Korzhenevskiy S, Ponomarev A, Chepusov A. Dual-energy processing of X-ray images of beryl in muscovite obtained using pulsed X-ray sources. Sensors 2023; 23(9): 4393. DOI: 10.3390/s23094393.
  22. Li B, Yadava G, Hsieh J. Quantification of head and body CTDI(VOL) of dual-energy x-ray CT with fast-kVp switching. Med Phys 2011; 38(5): 2595-2601. DOI: 10.1118/1.3582701.
  23. Niu Z, Chen J, Ren H, Wang Y, Tao XW, Zhan K. Comparison of image quality between split-filter twin beam dual energy and single energy images in abdominal CT. Eur J Radiol 2019; 121: 108702. DOI: 10.1016/j.ejrad.2019.108702.
  24. Franco PN, Spasiano CM, Maino C, Ponti E, Ragusi M, Giandola T, Terrani S, Peroni M, Corso R, Ippolito D. Principles and applications of dual-layer spectral CT in gastrointestinal imaging. Diagnostics 2023; 13(10): 1740. DOI: 10.3390/diagnostics13101740.
  25. Komarskiy AA, Korzhenevskiy SR, Ponomarev AV, Komarov NA. Pulsed X-ray source with the pulse duration of 50 ns and the peak power of 70 MW for capturing moving objects. J Xray Sci Technol 2021; 29(4), 567-576. DOI: 10.3233/XST-210873.
  26. Komarskiy AA, Korzhenevskiy SR, Komarov NA. X-ray sources of nanosecond pulses based on semiconductor opening switch for CT. AIP Conf Proc 2020; 2250(1): 020018. DOI: 10.1063/5.0013238.
  27. Rukin SN, Tsyranov SN. Subnanosecond breakage of current in high-power semiconductor switches. Tech Phys Lett 2000; 26(9): 824-826. DOI: 10.1134/1.1315507.
  28. Rukin SN. Pulsed power technology based on semiconductor opening switches: A review. Rev Sci Instrum 2020; 91(1): 011501. DOI: 10.1063/1.5128297.
  29. Komarskiy AA, Korzhenevskiy SR, Komarov NA, Krasniy OD. Calculating the radiation spectrum of pulsed X-ray sources based on semiconductor opening switches. AIP Conf Proc 2021; 2356(1): 020015. DOI: 10.1063/5.0052861.

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