Browse > Article
http://dx.doi.org/10.17946/JRST.2020.43.2.79

Evaluation of Artifact and Noise in the Standard and MAR Algorithms with Variation of Examination Conditions of CT  

Kim, Young-kuen (Dept. of Radiologic Technology, Gwangju Health University)
Yang, Sook (Industrial Researcher of Cusmedi Co.)
Wang, Tae-uk (Dept. of Radiology, Chonnam National University Hwasun Hospital)
Publication Information
Journal of radiological science and technology / v.43, no.2, 2020 , pp. 79-85 More about this Journal
Abstract
The influence of metal artifact in CT image depends on the type of metal materialsm, the reconstruction algorithm, and scan parameters. The presence of metal artifacts was quantitatively evaluated by applying the standard and MAR algorithms through the phantom study. In the change of tube voltage applied the standard algorithm, metal artifact decreased to 44.9% for 80 vs 120 kVp, 24% for 100 vs 120 kVp, while the image taken at 140 kVp increased the artifact by 19% compared to 120 kVp. When the tube current was increased from 100 to 300 mA, there was no significant difference in the CT value and noise. Black band and white strike artifacts occurred up to 65.9% in the adjacent ROI of the metal driver, whereas titanium screw produced lesser metal artifact than that of the metal driver. The combination of 120kVp or higher tube voltage-standard algorithm was effective in removing black band artifacts as well as white streak by high density materials. However, MAR reconstruction algorithm was useful in improving image quality under the environment of low kVp and high density materials, without increase of radiation exposure.
Keywords
MAR and Standard algorithm; kVp; mA; Slice thickness; Computed Tomography(CT); Metal artifact;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
연도 인용수 순위
1 Kim HJ, Yoon J. 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. 2017;18(7):84-91.   DOI
2 Anderson KM, Norman E, Geijer H, Krauss W. Visual grading evaluation of commercially available metal artefact reduction techniques in hip prosthesis computed tomography. The British Journal of Radiology. 2016;89(1063):1-11.
3 Andersson KM, Nowik P, Persliden J, Thunberg P, Norrman E. Metal artefact reduction in CT imaging of hip prostheses an evaluation of commercial techniques provided by four vendors. The British Journal of Radiology. 2015;88:1-7.
4 Kim HJ. A study of beam hardening effect reduction occur in brain CT. Journal of the Korea Academia-Industrial Cooperation Society, 2015;16(12):8479-86.   DOI
5 Kim MS, Jeong JS, Kim MG. Clinical apply of Dual energy CT(kVp switching) : A Novel approach for MAR(Metal Artifact Reduction) Method. Journal of Radiation Protection, 2011;36(2):79-86.
6 Kim HJ. A study of beam hardening effect reduction occur in brain CT. Journal of the Korea Academia- Industrial Cooperation Society, 2015;16(12):8479-86.   DOI
7 Kim YJ, Cha JG, Kim HJ, Yi JS, Kim HJ. Dual-Energy and Iterative Metal Artifact Reduction for Reducing Artifacts Due to Metallic Hardware: A Loosening Hip Phantom Study. American Journal of Roentgenology. 2019;212:1106-11.   DOI
8 Moon SG, Hong SH, Choi JY, Jun WS, Kang HG, Kim HS, Kang HS. Metal artifact reduction by the alteration of technical factors in multidetector computed tomography: A 3-dimensional quantitative assessment. J Comput Assist Tomogr. 2008 Jul-Aug;2(4):630-3.
9 White SC, Pharoah MJ. Oral radiology: Principles and interpretation. 7th Ed. St. Louis, Missouri, Elsevier-Mosby; 2014: 196.
10 Panjnoush M, Kheirandish Y, Kashani PM, Fakhar HB, Younesi F, Mallahi M. Effect of Exposure Parameters on Metal Artifacts in Cone Beam Computed Tomography. Journal of Dentistry of Tehran University of Medical Sciences. 2016;13(3):143-50.
11 Gjesteby L, De Man B, Jin Y, Paganetti H, Verburg J, Giantsoudi D, Wang G. Metal artifact reduction in CT: Where are we after four decades? IEEE. 2016;4:2169-3536.
12 Kim HJ, Yoon J. 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. 2016;17(9):655-62.   DOI