JOURNAL DESCRIPTION
The Medical Radiology and Radiation Safety journal ISSN 1024-6177 was founded in January 1956 (before December 30, 1993 it was entitled Medical Radiology, ISSN 0025-8334). In 2018, the journal received Online ISSN: 2618-9615 and was registered as an electronic online publication in Roskomnadzor on March 29, 2018. It publishes original research articles which cover questions of radiobiology, radiation medicine, radiation safety, radiation therapy, nuclear medicine and scientific reviews. In general the journal has more than 30 headings and it is of interest for specialists working in thefields of medicine¸ radiation biology, epidemiology, medical physics and technology. Since July 01, 2008 the journal has been published by State Research Center - Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency. The founder from 1956 to the present time is the Ministry of Health of the Russian Federation, and from 2008 to the present time is the Federal Medical Biological Agency.
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Medical Radiology and Radiation Safety. 2025. Vol. 70. № 1
DOI:10.33266/1024-6177-2025-70-1-115-121
A.V. Petraikin1, А.А. Baulin1,Y.A. Vasilev1, Z.R. Artyukova1, A.K. Smorchkova1,
D.S. Semenov1, A.A. Alihanov2, R.A. Erizhokov1, O.V. Omelyanskaya1
Analysis of Possibility of Using an Algorithm for Correcting Metal Artifacts in CT-Images for Radiation Therapy Planning
1 Research and Practical Clinical Center for Diagnostics and Telemedicine Technologies, Moscow, Russia
2 N.I. Pirogov RNIMU, Moscow, Russia
Контактное лицо: Аnatoly А. Baulin, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
ABSTRACT
Purpose: To quantitatively evaluate reconstruction software algorithms in combination with algorithm O-MAR for correcting metal artifacts in CT-images and explore the potential of using O-MAR for radiation therapy planning tasks.
Material and methods: A quantitative assessment of the O-MAR algorithm on CT scans of a 20 cm diameter cylindrical phantom with a hip joint implant in the center was performed. Test tubes with different concentrations of potassium hydrogen phosphate (K2HO4×3H2O) were placed around the implant. The evaluation parameters used standard deviation (SD) of the region of interest (ROI) density in HU units and the calculation of the degree of susceptibility to artifacts (P).The calculation of absorbed dose in the phantom was performed on the Eclipse 17.0 planning station, using the AAA (Analytical Anisotropic Algorithm) calculation algorithm.
Results: Calculations of the degree of artifact susceptibility showed that the minimum mean noise value was observed for the iMR series in combination with O-MAR (31.6 ± 45.5 HU) and the maximum for FBP (16) without O-MAR (77.0 ± 31.1 HU). As a result of comparison of CT studies with/without O-MAR, the average calculated difference in absorbed dose for all control points is 0.33±1.68 % and 0.42±1.38 % in the presence of implant for FBP and iMR modes, respectively. However, for both modes the difference was 3.22 % for the artifact zone (dark spot).
Conclusion: It is shown that the use of the O-MAR algorithm reduces the distorted values of X-ray density that arose as a result of the presence of an implant in CT studies. The calculation of the absorbed dose for the artifact zone (dark spot) shows a decrease in the uncertainty of the dose calculation in O-MAR-corrected studies.
Keywords:CT, metal artifacts reduction (MAR), radiation therapy planning
For citation: Petraikin AV, Baulin АА, Vasilev YA, Artyukova ZR, Smorchkova AK, Semenov DS, Alihanov AA, Erizhokov RA, Omelyanskaya OV. Analysis of Possibility of Using an Algorithm for Correcting Metal Artifacts in CT-Images for Radiation Therapy Planning. Medical Radiology and Radiation Safety. 2025;70(1):115–121. (In Russian). DOI:10.33266/1024-6177-2025-70-1-115-121
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PDF (RUS) Full-text article (in Russian)
Conflict of interest. The authors declare no conflict of interest.
Financing. This paper was prepared by a group of authors as a part of the research and development effort titled «Development of ahardware and software suite for opportunistic screening of osteoporosis» (USIS No.: 123031400007-7) in accordance with the Order No. 1196 dated December 21, 2022 «On approval of state assignments funded by means of allocations from the budget of the city of Moscow to the state budgetary (autonomous) institutions subordinate to the Moscow Health Care Department, for 2023 and the planned period of 2024 and 2025» issued by the Moscow Health Care Department.
Contribution. Article was prepared with equal participation of the authors.
Article received: 20.10.2024. Accepted for publication: 25.11.2024.