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http://dx.doi.org/10.7742/jksr.2022.16.6.709

Effect of Iterative-metal Artifact Reduction (iMAR) at Tomotherapy: a Phantom Study  

Daegun, Kim (Department of Radiation Oncology, Soonchunhyang University Bucheon Hospital)
Jaehong, Jung (Department of Radiation Oncology, Soonchunhyang University Bucheon Hospital)
Sungchul, Kim (Department of Health Science, Gachon University Graduate School)
Publication Information
Journal of the Korean Society of Radiology / v.16, no.6, 2022 , pp. 709-718 More about this Journal
Abstract
We evaluated the effect of high-density aluminum, titanium, and steel metal inserts on computed tomography (CT) numbers and radiation treatment plans for Tomotherapy. CT images were obtained using a cylindrical TomoPhantom comprising cylindrical rods of various densities and metal inserts. Three CT image sets were evaluated for image quality as the mean CT number and standard deviation. Dose evaluation also performed. The reference values did not significantly differ between the CT image sets with the corrected metal inserts. The higher-density material exhibited the largest difference in the mean CT number and standard deviation. The conformity index at Iterative-Metal Artifact Reduction (iMAR) was approximately 20% better than that of non-iMAR. No significant target or organ at risk dose difference was observed between non-iMAR and iMAR. Therefore, iMAR is helpful for target or organ at risk delineation and for reducing uncertainty for three-dimensional conformal radiation therapy in Tomotherapy.
Keywords
Hounsfield unit; Iterative-metal artifact reduction; Tomotherapy;
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Times Cited By KSCI : 2  (Citation Analysis)
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