Vibroacoustography for the assessment of total hip arthroplasty
Clinics
;
68(4): 463-468, abr. 2013. graf
Article
in English
| LILACS
| ID: lil-674233
ABSTRACT
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 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 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. .
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Arthroplasty, Replacement, Hip
/
Elasticity Imaging Techniques
Type of study:
Diagnostic study
/
Prognostic study
Limits:
Humans
Language:
English
Journal:
Clinics
Journal subject:
Medicine
Year:
2013
Type:
Article
/
Project document
Affiliation country:
United States
Institution/Affiliation country:
Mayo Clinic/US
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