Sun, Dan; Murphy, William S; Amundson, Andrew; Lane, Patrick; Kowal, Jens; Murphy, Stephen B (2023). Validation of a Novel Method of Measuring Cup Orientation using BiPlanar Simultaneous Radiographic Images. The journal of arthroplasty, 38(7S), S252-S256. Elsevier 10.1016/j.arth.2023.04.011
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BACKGROUND
Accurate acetabular component positioning is paramount to the success of total hip arthroplasty. Two-dimensional imaging alone remains a popular tool for implant position assessment despite known limitations. We investigated the accuracy of a novel method for assessing acetabular component position based upon orthogonal simultaneous biplanar Xray images.
METHODS
There were forty consecutive patients who had a pre-existing total hip arthroplasty (THA) on the contralateral side who underwent both computed tomography (CT) and simultaneous orthogonal biplanar radiographic scans for pre-operative planning of THA. The operative inclination (OI) and operative anteversion (OA) of the acetabular cup were calculated by a new measurement method using the biplanar simultaneous scans. Those measurements were compared to measurement of the cup orientation on CT. The measurements were made by two independent observers. Interobserver correlation coefficients were calculated between the two observers to measure reliability.
RESULTS
The mean error in OA measurement of the acetabular cup between simultaneous orthogonal biplanar radiographic and CT imaging was 0.5° (Standard Deviation (SD): 1.9°, minimum -4.0°, maximum 5.0°), the mean error in OI was 0.0° (SD: 1.7°, minimum -5.0°, maximum 4.0°). The average absolute error was 1.5° for OA, and 1.2° for OI. Interobserver correlation coefficient was 0.83 for OA and 0.93 for OI.
CONCLUSION
The novel method of measuring cup orientation using simultaneous biplanar radiographic scans utilized in this study was accurate and reproducible between observers compared to CT measurements.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
10 Strategic Research Centers > ARTORG Center for Biomedical Engineering Research |
UniBE Contributor: |
Kowal, Horst Jens |
Subjects: |
500 Science > 570 Life sciences; biology 600 Technology > 610 Medicine & health |
ISSN: |
1532-8406 |
Publisher: |
Elsevier |
Language: |
English |
Submitter: |
Pubmed Import |
Date Deposited: |
20 Apr 2023 11:28 |
Last Modified: |
18 Apr 2024 00:25 |
Publisher DOI: |
10.1016/j.arth.2023.04.011 |
PubMed ID: |
37075906 |
Uncontrolled Keywords: |
Acetabular cup Arthroplasty Biplanar Radiographs Postoperative measurement |
BORIS DOI: |
10.48350/181868 |
URI: |
https://boris.unibe.ch/id/eprint/181868 |
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