Abstract
This paper presents a novel morphing method for parameterizing patient-specific femur models based on femoral biomechanical functions. The proposed function-based morphing (FBM) method aims to provide a robust way to independently morph each partial functional region of the target femur structure by simply assigning the given functional parameters such as the femoral head diameter, neck length and diameter, and neck inclination angle. FBM includes three steps: (1) feature recognition to segment a femoral model into functional regions, (2) simplification to estimate the original parameters of the model and to define the morphing criteria as geometrical constraints, and (3) morphing to obtain the required shape by applying FBM fields that convert the terms of parametric changes into morphing vector terms for each segmented region. The proposed method was validated on a total of 48 patient-specific femur models. These models were parameterized and morphed without unexpected parametric changes, and the averaged error between the required parameters and the re-estimated parameters after morphing was 3.47%. Our observations indicate that the variation models developed in this study can be used as fundamentals for various functional sensitivity analyses for predicting changes in biomechanical responses due to the morphological changes of a subject-specific femur structure.
| Original language | English |
|---|---|
| Pages (from-to) | 31-38 |
| Number of pages | 8 |
| Journal | CAD Computer Aided Design |
| Volume | 51 |
| DOIs | |
| Publication status | Published - 2014 Jun 1 |
Keywords
- Biomechanical function
- Function-based morphing
- Parameterization
- Patient-specific model
- Proximal femur geometry
ASJC Scopus subject areas
- Computer Graphics and Computer-Aided Design
- Computer Science Applications
- Industrial and Manufacturing Engineering
Cite this
Function-based morphing methodology for parameterizing patient-specific models of human proximal femurs. / Park, Byoung Keon; Bae, Ji Hoon; Koo, Bon Yeol; Kim, Jay J.
In: CAD Computer Aided Design, Vol. 51, 01.06.2014, p. 31-38.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Function-based morphing methodology for parameterizing patient-specific models of human proximal femurs
AU - Park, Byoung Keon
AU - Bae, Ji Hoon
AU - Koo, Bon Yeol
AU - Kim, Jay J.
PY - 2014/6/1
Y1 - 2014/6/1
N2 - This paper presents a novel morphing method for parameterizing patient-specific femur models based on femoral biomechanical functions. The proposed function-based morphing (FBM) method aims to provide a robust way to independently morph each partial functional region of the target femur structure by simply assigning the given functional parameters such as the femoral head diameter, neck length and diameter, and neck inclination angle. FBM includes three steps: (1) feature recognition to segment a femoral model into functional regions, (2) simplification to estimate the original parameters of the model and to define the morphing criteria as geometrical constraints, and (3) morphing to obtain the required shape by applying FBM fields that convert the terms of parametric changes into morphing vector terms for each segmented region. The proposed method was validated on a total of 48 patient-specific femur models. These models were parameterized and morphed without unexpected parametric changes, and the averaged error between the required parameters and the re-estimated parameters after morphing was 3.47%. Our observations indicate that the variation models developed in this study can be used as fundamentals for various functional sensitivity analyses for predicting changes in biomechanical responses due to the morphological changes of a subject-specific femur structure.
AB - This paper presents a novel morphing method for parameterizing patient-specific femur models based on femoral biomechanical functions. The proposed function-based morphing (FBM) method aims to provide a robust way to independently morph each partial functional region of the target femur structure by simply assigning the given functional parameters such as the femoral head diameter, neck length and diameter, and neck inclination angle. FBM includes three steps: (1) feature recognition to segment a femoral model into functional regions, (2) simplification to estimate the original parameters of the model and to define the morphing criteria as geometrical constraints, and (3) morphing to obtain the required shape by applying FBM fields that convert the terms of parametric changes into morphing vector terms for each segmented region. The proposed method was validated on a total of 48 patient-specific femur models. These models were parameterized and morphed without unexpected parametric changes, and the averaged error between the required parameters and the re-estimated parameters after morphing was 3.47%. Our observations indicate that the variation models developed in this study can be used as fundamentals for various functional sensitivity analyses for predicting changes in biomechanical responses due to the morphological changes of a subject-specific femur structure.
KW - Biomechanical function
KW - Function-based morphing
KW - Parameterization
KW - Patient-specific model
KW - Proximal femur geometry
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U2 - 10.1016/j.cad.2014.02.003
DO - 10.1016/j.cad.2014.02.003
M3 - Article
VL - 51
SP - 31
EP - 38
JO - CAD Computer Aided Design
JF - CAD Computer Aided Design
SN - 0010-4485
ER -