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    3. Prosthetic Metallic Artifact Reduction

    Prosthetic Metallic Artifact Reduction

    4min
    Damita L. Thomas
    Published on June 19, 2018

    History

    Findings

    iMAR aides in the reduction of metal artifacts in PET/CT.

    Comments

    Coronal images without and with iMAR application.
    A) Image without iMAR, demonstrating large bands of blackness reflecting artifact from prosthesis, obscuring soft tissue detail.
    B) With iMAR, soft tissue structures are visualized.
    iMAR aides in the reduction of metal artifacts in PET/CT.

    Conclusion

    Axial images without & with iMAR application.
    A) Arrows delineating black band & white streaking artifact from prosthesis, which obscure vasculature structures.
    B) Visualization of the contrast-enhanced left femoral artery, revealing intact vessel.

    Examination protocol

    CT

    Tube voltage

    110 kV

    Tube current

    100 eff mAs

    Slice thickness

    5 mm

    By Damita L. Thomas
    Data courtesy of New Century Imaging, Oradell, New Jersey, USA
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    2. American Academy of Orthopaedic Surgeons. Total hip replacement. https://orthoinfo.aaos.org/en/treatment/total-hip-replacement. Updated August 2015. Accessed March 14, 2018.
    3. Kremers HM, Larson DR, Crowson CS, et al. Prevalence of total hip and knee replacement in the United States. J Bone Joint Surg Am. 2015;97:1386-1397.
    4. Dargel J, Oppermann J, Brüggemann G-P, Eysel P. Dislocation following total hip replacement. Dtsch Arztebl Intl. 2014;111:884-890.
    5. Barrett JF, Keat N. Artifacts in CT: recognition and avoidance. Radiographics. 2004;24:1679-1691.
    6. Huang JY, Followill DS, Howell RM, et al. Approaches to reducing photon dose calculation errors near metal implants. Med Phys. 2016;43(9):5117-5130.
    7. The outcomes by Siemens Healthineers customers described herein are based on results that were achieved in the customer’s unique setting. Since there is no “typical” hospital and many variables exist (e.g., hospital size, case mix, level of IT adoption) there can be no guarantee that other customers will achieve the same results.