Abstract: Aim: was to evaluate possibilities of dual-energy multislice computed tomography (MSCT) in determining the composition of kidney stones. Materials and methods: a dual-energy MSCT was performed in 60 patients with urolithiasis of different locations (63.3% male, 36.7% female). Two groups of patients were identified: with mixed (simultaneously, the patient was diagnosed with stones of urate and non-urate structure) and nonurate composition of stones. Out of 60 patients, 16 (10 patients from a mixed group and 6 from a non-urate) were subjected to chemical analysis of stones by IR-spectrometry and X-ray phase analysis. Obtained data were compared with data of the dual-energy MSCT Results: in most cases (93,7 %), results of the chemical analysis of stones confirmed the structure of uroliths obtained by the dual-energy MSCT method. Conclusions: The method of dual-energy multislice computed tomography is effective in determining the composition of stones of the urinary system, appears to be a promising method in the diagnosis of urolithiasis, and expands possibilities of modern urology in planning patients with urolithiasis. References 1. Akopyan A.V., Zorkin S.N., Vorobyova L.E., Shakhnovsky D.S., Mazo A.M. Ocenka sostava konkrementa v lechenii mochekamennoj bolezni. [Evaluation of the concrement in the treatment of urolithiasis.] Detskaya khirurgiya. 2015; 19(1): 42-45 (in Rus). 2. Turk C., Knoll Т., Petrik А., Sarica K., Straub M., Seitz C. Guidelines on urolithiasis. European Association of Urology. 2014; 128 p. 3. Suslyaeva N.M. Vozmozhnosti luchevyh metodov issledovaniya v diagnostike visceral'nogo ozhireniya. [Possibilities of radiation research methods in the diagnosis of visceral obesity.] Bulleten Sibirskoy Meditsini. 2010; 9(5): 121-128 (in Rus). 4. Klimkova M.M., Sinitsin V.V., Mazurenko D.A., Bernikov E.V. Vozmozhnosti luchevyh metodov Perspektivy primeneniya dvuhehnergeticheskoj komp'yuternoj tomografii v diagnostike mochekamennoj bolezni i opredelenii himicheskogo sostava mochevyh kamnej (obzor literatury). v diagnostike visceral'nogo ozhireniya. [Prospects for the use of dual-energy computed tomography in the diagnosis of urolithiasis and the determination of the chemical composition of urinary stones (literature review).] Medical Imaging. 2016; 6: 84-92 (in Rus). 5. Graser A. Dual energy CT characterization of urinary calculi: initial in vitro and clinical experience. Invest Radiol. 2008; 43(2): 112-119. 6. Kapsargin F.P., Dyabkin E.V., Berezhnoy A.G. Sovremennye podhody hirurgicheskogo lecheniya mochekamennoj bolezni. [Modern approaches to the surgical treatment of urolithiasis.] Novosti khirurgii. 2013; 21(1): 101-106 (in Rus). 7. Yanenko E.K., Merinov D.S., Konstantinova O.V., Epishov V.A., Kalinichenko D.N. Sovremennye tendencii v ehpidemiologii, diagnostike i lechenii mochekamennoj bolezni. [Modern trends in the epidemiology, diagnosis and treatment of urolithiasis]. Eхperim. I klinich. urology. 2012; 3: 19-24 (in Rus). 8. Gucuk. A., Uyeturk U. Usefulness of hounsfield unit and density in the assessment and treatment of urinary stones. World J. Nephrol. 2014; 3(4): 282-286. 9. Kapanadze L.B., 10. Kambadakone A.R., Eisner B.H., Catalano O.A., Sahani D.V. New and evolving concepts in the imaging and management of urolithiasis: urologists' perspective. Radiographics. 2010; 30(3):603-623. DOI: 10.1148/rg. 303095146. 11. Eliahou R., Hidas G., Duvdevani M., Sosna J. Determination of renal stone composition with dual-energy computed tomography: an emerging application. Seminars in Ultrasound, CT and MRI. 2010; 31(4): 315-320. DOI: 10.1053/j.sult.2010.05.002. 12. Leng S., Huang A., Cardona J.M., Duan X., Williams J.C., McCollough C.H. Dual-Energy CT for Quantification of Urinary Stone Composition in Mixed Stones: A Phantom Study. American Journal of Roentgenology. 2016;207: 321-329. DOI: 10.2214/AJR.15.15692. 13. Yadav B., Maharjan S. Characterization of Urinary Tract Stones with Dual Energy Computed Tomography. Radiography Open. 2017; 3(1): 11. DOI: 10.7577 /radopen.2001
