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KMID : 0364920110360020079
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Journal of Radiation Protection and Research
2011 Volume.36 No. 2 p.79 ~ p.85
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Clinical Apply of Dual Energy CT (kVp switching) : A Novel Approach for MAR(Metal Artifact Reduction) Method
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Kim Myeong-Seong
Jeong Jong-Sung
Kim Myeong-Gu
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Abstract
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OThe purpose of this article was to measure and compare the value of the metal artifact reduction (MAR) algorithm by Dual energy(kVp switching) CT (Computed Tomography) for non using MAR and we introduced new variable Dual energy CT applications through a clinical scan. The used equipment was GE Discovery 750HD with Dual-Energy system(kVp switching). CT scan was performed on the neck and abdomen area subject for patients. Studies were from Dec 20 2010 to Feb 10 2011 and included 25 subject patients with prosthesis. We were measured the HU (Hounsfield Unit) and noise value at metal artifact appear(focal loss of signal and white streak artifact area) according to the using MAR algorithm. Statistical analyses were performed using the paired sample t-test. In patient subject case, the statistical difference of showing HU was p=0.01 and p=0.04 respectively. At maximum black hole artifact area and white streak artifact area according to the using MAR algorithm. However noise was p=0.05 and p=0.04 respectively; and not the affected black hole and white streak artifact area. Dual Energy CT with the MAR algorithm technique is useful reduce metal artifacts and could improve the diagnostic value in the diagnostic image evaluation of metallic implants area.
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KEYWORD
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Metal implant, Dual-energy CT, MARs, Metal artifact
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