Journal article
3D Biometrics for Hindfoot Alignment Using Weightbearing Computed Tomography
Foot & ankle international, Vol.40(6), pp.720-726
06/2019
DOI: 10.1177/1071100719835492
PMID: 30854889
Abstract
Weightbearing computed tomography (WBCT) is a useful tool for the assessment of hindfoot alignment (HA). Foot ankle offset (FAO) is a recently introduced parameter, determined from WBCT images using semiautomatic software. The aim of this study was to determine the clinical relevance and reproducibility of FAO for the evaluation of HA.
A prospective comparative study was performed on consecutive patients requiring bilateral WBCT between September 2017 and April 2018. Based on the clinical assessment of HA, patients were divided into 3 groups: (1) normal alignment group (G1), (2) valgus (G2), and (3) varus (G3). FAO and long axial view (HACT) were measured on WBCT images, and the groups were compared. The reproducibility of FAO and HACT was determined through intraclass correlation coefficients (ICCs). Regression analysis was performed to investigate the correlation between the 2 methods. Overall, 249 feet (126 patients) were included (G1 = 115, G2 = 78, and G3 = 56 feet).
The mean values for FAO and HACT were 1.2% ± 2.8% and 3.9 ± 3.1, respectively, in G1; 8.1% ± 3.7% and 9.7 ± 4.9 in G2; and -6.6% ± 4.8% and -8.2 ± 6.6 in G3. Intra- and interobserver reliability was 0.987 and 0.988 for FAO and 0.949 and 0.949 for HACT, respectively. There was a good linear correlation between HACT and FAO ( R
= 0.744), with a regression slope of 1.064.
WBCT was a useful method for the characterization of HA. FAO was reproducible and correlated well with physical examination.
Level II, prospective comparative study.
Details
- Title: Subtitle
- 3D Biometrics for Hindfoot Alignment Using Weightbearing Computed Tomography
- Creators
- Jian Zhong Zhang - 1 Department of Orthopedics, Beijing Tongren Hospital, Capital Medical University, Beijing, ChinaFrançois Lintz - 2 Foot and Ankle Surgery Center, Clinique de l'Union, Saint-Jean, FranceAlessio Bernasconi - 3 Foot and Ankle Unit, Royal National Orthopaedic Hospital, Stanmore, United KingdomWeight Bearing CT International Study GroupShu Zhang - 1 Department of Orthopedics, Beijing Tongren Hospital, Capital Medical University, Beijing, China
- Contributors
- Cesar De Cesar Netto (Contributor) - University of Iowa, Orthopedics and Rehabilitation
- Resource Type
- Journal article
- Publication Details
- Foot & ankle international, Vol.40(6), pp.720-726
- Publisher
- United States
- DOI
- 10.1177/1071100719835492
- PMID
- 30854889
- ISSN
- 1071-1007
- eISSN
- 1944-7876
- Grant note
- name: The National Key Research and Development Program of China, award: 2017YFC0108100
- Language
- English
- Date published
- 06/2019
- Academic Unit
- Orthopedics and Rehabilitation
- Record Identifier
- 9984040463002771
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