Reliability of Hindfoot Alignment Using Weightbearing CT Semi Automatic Software: an Analysis of 135 Feet

Foot & Ankle Orthopaedics

FrancoisLintz¹ 

关键词: Hindfoot Alignment;    Weight Bearing CT;    Cone Beam;    Foot Ankle Offset;    3D Biometrics;   

DOI  :  10.1177/2473011417S000058

学科分类：医学（综合）

来源: Sage Journals

【 摘 要 】

Category:Ankle, Hindfoot, ImagingIntroduction/Purpose:Hindfoot Alignment (HA) on 2D radiographs presents anatomical and operator-related bias. In this study, weightbearing CT (WBCT) was used to measure HA using a semi-automatic software which gives HA as a value of Foot Ankle Offset (FAO) after selecting four landmarks (weight bearing points of first and fifth Metatarsals, Calcaneus and center of the ankle joint). We assessed the intra and interobserver reproducibility and the distribution of FAO values in a series of datasets from clinically normal, varus and valgus cases. We hypothesized that reproducibility would be excellent. Furthermore, FAO in normals should have a Gaussian distribution and be significantly different to the varus and valgus groups.Methods:In this level 3, retrospective comparative study, WBCT (PedCAT ®, CurveBeam LLC, Warrington, PA, USA) datasets were obtained from an existing database. The 135 feet were assessed by a senior foot and ankle surgeon as normal, varus or valgus (57, 38...

【 授权许可】

CC BY