Automated Web Tool Measurement of Total Hip Arthroplasty Acetabular Component Inclination and Anteversion Angles

Background: Periprosthetic hip dislocation after total hip arthroplasty is a devastating postoperative complication. It is often associated with suboptimal orientation of the acetabular component, characterized by the acetabular abduction and anteversion angles obtained from anteroposterior pelvic r...

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Main Authors: Christine Yoon, BS, Anna Eligulashvili, BS, Zeynep Seref-Ferlengez, PhD, Barlas Goker, MD, Eli Kamara, MD, Edward Mardakhaev, MD
Format: Article
Language:English
Published: Elsevier 2025-02-01
Series:Arthroplasty Today
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Online Access:http://www.sciencedirect.com/science/article/pii/S2352344124002917
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author Christine Yoon, BS
Anna Eligulashvili, BS
Zeynep Seref-Ferlengez, PhD
Barlas Goker, MD
Eli Kamara, MD
Edward Mardakhaev, MD
author_facet Christine Yoon, BS
Anna Eligulashvili, BS
Zeynep Seref-Ferlengez, PhD
Barlas Goker, MD
Eli Kamara, MD
Edward Mardakhaev, MD
author_sort Christine Yoon, BS
collection DOAJ
description Background: Periprosthetic hip dislocation after total hip arthroplasty is a devastating postoperative complication. It is often associated with suboptimal orientation of the acetabular component, characterized by the acetabular abduction and anteversion angles obtained from anteroposterior pelvic radiographs. We introduce a novel automated web tool to streamline the subjective and lengthy process of this manual measurement and compare it to manual human measurements. Methods: One board-certified orthopaedic surgeon used the web tool to make automatic measurements of anteroposterior radiographs of 97 patients who underwent unilateral hip arthroplasty. Manual and web tool measurements included abduction angle and calculated anteversion angle by Liaw’s method. Differences between manual and web tool measurements were compared with a paired t-test and Bland-Altman analysis. Results: There were no statistically significant differences between the average of manual measurements as compared to the web tool measurement in abduction angle (43.29 ± 7.05 vs 43.00 + 6.22, P = .85), anteversion angle (20.43 ± 7.62 vs 20.82 ± 7.37, P = .52), and ratio of the minor axis of the acetabular cup circumference in the AP radiograph to the total length of the acetabular head (0.42 ± 0.15 vs 0.44 ± 0.15, P = .18). The mean difference of average for abduction angle, anteversion angle, and ratio between the short axis of the transverse ellipse to the total length of the acetabular cup were −0.28, 0.39, and 0.02, respectively. Bland-Altman analysis for all 3 measurements displayed negligible systemic bias with random scattering. Conclusions: Automated measurements obtained with a novel web tool are in strong agreement with the manually obtained ground truth measurements. The web tool helps to eliminate interobserver differences that arise with manual annotation. The web tool has the potential to streamline acetabular measurements with enhanced accuracy.
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series Arthroplasty Today
spelling doaj-art-7c3611b550d844b59f37208a5b9dd27c2025-02-10T04:34:31ZengElsevierArthroplasty Today2352-34412025-02-0131101606Automated Web Tool Measurement of Total Hip Arthroplasty Acetabular Component Inclination and Anteversion AnglesChristine Yoon, BS0Anna Eligulashvili, BS1Zeynep Seref-Ferlengez, PhD2Barlas Goker, MD3Eli Kamara, MD4Edward Mardakhaev, MD5Albert Einstein College of Medicine, Bronx, NY; Corresponding author. Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx, NY 10461.Tel.: +1 516 242 8722.Albert Einstein College of Medicine, Bronx, NYDepartment of Orthopedic Surgery, Montefiore Medical Center, Bronx, NYDepartment of Orthopedic Surgery, Montefiore Medical Center, Bronx, NYDepartment of Orthopedic Surgery, Montefiore Medical Center, Bronx, NYDepartment of Radiology, Montefiore Medical Center, Bronx, NYBackground: Periprosthetic hip dislocation after total hip arthroplasty is a devastating postoperative complication. It is often associated with suboptimal orientation of the acetabular component, characterized by the acetabular abduction and anteversion angles obtained from anteroposterior pelvic radiographs. We introduce a novel automated web tool to streamline the subjective and lengthy process of this manual measurement and compare it to manual human measurements. Methods: One board-certified orthopaedic surgeon used the web tool to make automatic measurements of anteroposterior radiographs of 97 patients who underwent unilateral hip arthroplasty. Manual and web tool measurements included abduction angle and calculated anteversion angle by Liaw’s method. Differences between manual and web tool measurements were compared with a paired t-test and Bland-Altman analysis. Results: There were no statistically significant differences between the average of manual measurements as compared to the web tool measurement in abduction angle (43.29 ± 7.05 vs 43.00 + 6.22, P = .85), anteversion angle (20.43 ± 7.62 vs 20.82 ± 7.37, P = .52), and ratio of the minor axis of the acetabular cup circumference in the AP radiograph to the total length of the acetabular head (0.42 ± 0.15 vs 0.44 ± 0.15, P = .18). The mean difference of average for abduction angle, anteversion angle, and ratio between the short axis of the transverse ellipse to the total length of the acetabular cup were −0.28, 0.39, and 0.02, respectively. Bland-Altman analysis for all 3 measurements displayed negligible systemic bias with random scattering. Conclusions: Automated measurements obtained with a novel web tool are in strong agreement with the manually obtained ground truth measurements. The web tool helps to eliminate interobserver differences that arise with manual annotation. The web tool has the potential to streamline acetabular measurements with enhanced accuracy.http://www.sciencedirect.com/science/article/pii/S2352344124002917Total hip arthroplasty (THA)Safe zoneAcetabular inclination angleAcetabular anteversion angleS/TLHip dislocation
spellingShingle Christine Yoon, BS
Anna Eligulashvili, BS
Zeynep Seref-Ferlengez, PhD
Barlas Goker, MD
Eli Kamara, MD
Edward Mardakhaev, MD
Automated Web Tool Measurement of Total Hip Arthroplasty Acetabular Component Inclination and Anteversion Angles
Arthroplasty Today
Total hip arthroplasty (THA)
Safe zone
Acetabular inclination angle
Acetabular anteversion angle
S/TL
Hip dislocation
title Automated Web Tool Measurement of Total Hip Arthroplasty Acetabular Component Inclination and Anteversion Angles
title_full Automated Web Tool Measurement of Total Hip Arthroplasty Acetabular Component Inclination and Anteversion Angles
title_fullStr Automated Web Tool Measurement of Total Hip Arthroplasty Acetabular Component Inclination and Anteversion Angles
title_full_unstemmed Automated Web Tool Measurement of Total Hip Arthroplasty Acetabular Component Inclination and Anteversion Angles
title_short Automated Web Tool Measurement of Total Hip Arthroplasty Acetabular Component Inclination and Anteversion Angles
title_sort automated web tool measurement of total hip arthroplasty acetabular component inclination and anteversion angles
topic Total hip arthroplasty (THA)
Safe zone
Acetabular inclination angle
Acetabular anteversion angle
S/TL
Hip dislocation
url http://www.sciencedirect.com/science/article/pii/S2352344124002917
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