Head and Neck Imaging
The Application of Reducing Metal Artifacts of Spinal Implants in Flash CT*
Author：CHEN Xiao-mei, LIU Biao, XIE Zhao-lin,et al.
affiliation：Department of Radiology, Guigang People's Hospital, Guigang 537100, Guangxi Province, China
PDFAbstract
Objective To evaluate the optimal energy of the monochromatic imaging with Flash CT dual energy scan in reducing spinal pedicle screw metallic artifacts, and find out the best reconstruction images for clinical evalution. Methods The 19 groups images were evaluted by 5 points in bone window and soft tissue window from 48 patients,and the Kruskal-Wallis was used for statistical analysis,and the differences of Max and Mini artifacts was compared using Paired t-test at the same groups. The actual diameter of the 253 screws was compared with the width of each monochromatic images. Results The scores of monochromatic images were higher than the polychromatic images, and the 130keV image was the highest score.The heaviest and little artifacts CT value were large different below the 120keV Monochromatic images, of P＜0.05. Approximate true values of nails on 154keV monochromatic images. Conclusion Above 130keV monochromatic images reduced the metallic artifacts,but combined with the score of bone and soft tissue window, 130keV images was the best. The screw were best observed in the 154keV monochromatic images.
【Keyword】Flash CT; Monochromatic; Metallic Artifacts
【Chart number】R826.64
【Document Identification Number】A
【DOI】10.3969/j.issn.1672-5131.2018.08.043
Chinese journal of CT and MRI
th16Volume， th 8 Issue
2018Year08Month
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