Vibroacoustography for the assessment of total hip arthroplasty

Vibroacoustography for the assessment of total hip arthroplasty

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OBJECTIVES: This paper proposes imaging with 3-dimensional vibroacoustography for postoperatively assessing the uncovered cup area after total hip arthroplasty as a quantitative criterion to evaluate implant fixation.METHODS: A phantom with a bone-like structure covered by a tissue-mimicking material was used to simulate a total hip arthroplasty case.Vibroacoustography images of the uncovered cup region were generated using a two-element confocal ultrasound transducer and a hydrophone inside a water tank.Topological correction based on the geometry of the implant was performed to generate a 3-dimensional vx bonnet protector representation of the vibroacoustography image and to accurately evaluate the surface.

The 3-dimensional area obtained by the vibroacoustography approach was compared to the area evaluated by a 3-dimensional motion capture system.RESULTS: The vibroacoustography technique provided high-resolution, high-contrast, and speckle-free images with less sensitivity to the beam incidence.Using a 3-dimensional-topology correction of the image, we accurately estimated the uncovered area of the implant with a relative error of 8.1% in comparison with the motion capture system measurements.

CONCLUSION: Measurement of the cup coverage after total hip arthroplasty has not been well established; however, the covered surface area of the acetabular component is one of the most important prognostic factors.The preliminary results of this study show argento romano countertop that vibroacoustography is a 3-dimensional approach that can be used to postoperatively evaluate total hip arthroplasty.The favorable results also provide an impetus for exploring vibroacoustography in other bone or implant surface imaging applications.