Development and evaluation of a method to define a tibial coordinate system through the fitting of geometric primitives
- Resource Type
- article
- Authors
- Stuart C. Millar; John B. Arnold; Lucian B. Solomon; Dominic Thewlis; François Fraysse
- Source
- International Biomechanics, Vol 8, Iss 1, Pp 12-18 (2021)
- Subject
- ct reconstruction
knee
fracture
imaging
coordinate system
Biotechnology
TP248.13-248.65
Physiology
QP1-981
- Language
- English
- ISSN
- 2333-5432
23335432
Coordinate system definition is a critical element of biomechanical modeling of the knee, and cases of skeletal trauma present major technical challenges. This paper presents a method to define a tibial coordinate system by fitting geometric primitives to surface anatomy requiring minimal user input. The method presented here utilizes a conical fit to both the tibial shaft and femoral condyles to generate independent axes forming the basis of a tibial coordinate system. Definition of the tibial axis showed high accuracy when shape fitting to ≥50 mm of shaft with