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http://dx.doi.org/10.7742/jksr.2021.15.3.273

A Study of the Metal Artifact Reduction using Dual Energy CT : Clinical Applications of Dual Energy and MAR Algorithm  

Park, Ki Seok (Department of Radiological Science, Busan Haeundae PAIK Hospital)
Choi, Woo Jeon (Department of Radiological Science, Busan BON Hospital)
Kim, Dong Hyun (Department of Radiological Science, Catholic University of Pusan)
Publication Information
Journal of the Korean Society of Radiology / v.15, no.3, 2021 , pp. 273-279 More about this Journal
Abstract
Metal material inserted into the body have a large difference in density from human tissues or bones around the Metal during CT scans.. Therefore, the Metal material inserted into the body produces Artifact. Metal Artifact, which occurs around Metals, can degrade the quality of CT images, causing confusion when medical team diagnose lesions. Through this experiment, we confirm that the occurrence of Artifacts decrease by using Dual energy CT and MAR algorithm in Single source Dual energy CT. We also want to present basic data on clinical application methods by comparing and analyzing the characteristics of images obtained by each method. Using GE 750HD CT, artificial implants were scanned using general method and Dual energy. Then we apply the MAR algorithm to each image obtained. And all previously acquired images were compared and analyzed the characteristics of the examination, such as image quality evaluation and dose evaluation. Images with MAR algorithm and Dual Energy confirmed a decrease in Metal Artifact. Images with MAR algorithm have reduced Metal Artifact, but have the disadvantage of distorting the details of artificial joint implants. On the other hand images teseted with Dual Energy have the advantage of being able to implement details than those applied with MAR algorithms, it takes longer to reconstruct the image and the exposure dose was about four times higher than those applied with MAR algorithm. In order to locate Metals, such as the post-operative follow-up period, it is useful to apply MAR algorithm to obtain images. And it is more useful to examine with Dual Energy when micro lesion identification, such as cardiac examination, and surgical planning or when tests are performed in diagnostic way.
Keywords
Metal Artifact; MAR; Dual Energy; exposure dose; SNR;
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1 M. S. Kim, J. S. Jeong, M. G. Kim, "Clinical Apply of Dual Energy CT (kVp switching): A Novel Approach for MAR(Metal Artifact Reduction) Method," Journal of Radiation protection, Vol. 36, No. 2, pp. 79-85, 2011.
2 E. H. Goo, "A study of the CT MAR using single-source and dual-source devices : practical comparison using animal phantom fabrication", Journal of the Korean Society of Radiology. Vol. 14, No, 14, No. 7. pp 1003-1011, 2020. https://doi.org/10.7742/jksr.2020.14.7.1003   DOI
3 H. J. Kim, J. Yoon, "The Analysis of CT Number Rate of Change of Applying The Iterative Metallic Artifact Reduction Algorithm for CT Reconstruction Image", Journal of the Korea Academia-Industrial cooperation Society, Vol. 18. No. 7. pp. 84-91, 2017. https://doi.org/10.5762/KAIS.2017.18.7.84   DOI
4 H. J. Kim, J. Yoon, "Convergence Comparison of Metal Artifact Reduction Rate for Pacemaker Insertion of CT Imaging Phantoms in the Raw Data with MAR Algorithm," Journal of the Korea Convergence Society, Vol. 8. No. 1. pp. 43-49, 2017. https://doi.org/10.15207/JKCS.2017.8.1.043   DOI
5 H. J. Kim, J. Yoon, "Analysis of the Artifact reduction rate for the types of medical Metals in CT with MAR algorithm," Journal of the Korea Academia-Industrial cooperation Society, Vol. 17. No. 9 pp. 655-662, 2016. https://doi.org/10.5762/KAIS.2016.17.9.655   DOI
6 S. H. Lee, K. H. Yang, D. Y. Kim, S. B. Kim, "MAR method of study use to Dual Source CT," Journal of Korean Society of Computed Tomographic Technology, Vol. 1, No. 15, pp. 97-103, 2013. https://doi.org/10.7742/jksr.2020.14.7.1003   DOI
7 H. J. Kim, " Usefulness Evaluation of Application of Metallic Algorithm Reducing for Beam Hardening Artifact Occur in Typical Brain CT Image", Journal of the Korean Society of Radiology, Vol. 12, No. 3, pp. 389-395, 2018. https://doi.org/10.7742/jksr.2018.12.3.389   DOI
8 J. R. Park, M. S. Kim, J. M. Kim, H. S. Chung, C. H. Lee, G. M. Back. "A Study on Usefulness of Clinical Application of Metal Artifact Reduction Algorithm in Radiotherapy," Journal of the Korean Society for Radiation Therapy, Vol. 29. No. 2. pp. 9-17, 2017.
9 https://www.gehealthcare.com/-/jssmedia/3b5c4c1c695e45a9b41309ae3f4ce22b.pdf?la=en-us
10 Y. K. Kim, S. Yang, T. U. Wang, "Evaluation of Artifact and Noise in the Standard and MAR Algorithms with Variation of Examination Conditions of CT," Journal of Radiological Science and Technology, Vol. 43, No. 2, pp. 79-85, 2020. https://doi.org/10.17946/JRST.2020.43.2.79   DOI