Clinical Potential of Digital Linear Tomosynthesis Imaging of Total Joint Arthroplasty |
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Authors: | Tsutomu Gomi Hiroshi Hirano |
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Affiliation: | (1) School of Allied Health Sciences, Kitasato University, 1-15-1 Kitasato, Sagamihara Kanagawa, 228-8555, Japan;(2) Department of Radiology, Shinshu University Hospital, 3-1-1 asahi, Matsumoto, Nagano 390-8621, Japan |
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Abstract: | The present study was performed to evaluate the potential for clinical application of digital linear tomosynthesis in imaging
hip prostheses. Volumetric x-ray digital linear tomosysnthesis was used to image hip prostheses. The tomosynthesis was compared
to metal artifact reduction (MAR) computed tomography (CT), and non-MAR CT scans of a prosthesis case. The effectiveness of
this method in enhancing visibility of a prosthesis case was quantified in terms of the signal-to-noise ratio (SNR), and removal
of ghosting artifacts in a prosthesis case was quantified in terms of the artifact spread function (ASF). In the near in-focus
plane, the contrast is greater in the MAR CT or tomosynthesis relative to the non-MAR CT. The order of ASF performance of
the algorithm was as follows: (1) tomosynthesis; (2) MAR-CT; (3) non-MAR CT. The potential usefulness of digital linear tomosynthesis
for evaluation of hip prostheses was demonstrated. Further studies are required to determine the ability of digital linear
tomosynthesis to quantify the spatial relationships between the metallic components of these devices as well as to identify
bony changes with diagnostic consequences. |
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Keywords: | Digital tomosynthesis total joint arthroplasty |
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