Dual-zone material assignment method for correcting partial volume effects in image-based bone models
Dual-zone material assignment method for correcting partial volume effects in image-based bone models
复制标题
用于校正基于图像的骨模型中的部分体积效应的双区材料分配方法
DOI:
10.1080/10255842.2022.2119383
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发表时间:
2022
影响因子:
1.6
通讯作者:
Dailey, Hannah L.
中科院分区:
文献类型:
--
作者:
Inglis, Brendan;Grumbles, Daniel;Dailey, Hannah L.
In image-based finite element analysis of bone, partial volume effects (PVEs) arise from image blur at tissue boundaries and as a byproduct of geometric reconstruction and meshing during model creation. In this study, we developed and validated a material assignment approach to mitigate partial volume effects. Our validation data consisted of physical torsion testing of intact tibiae fromN= 20 Swiss alpine sheep. We created finite element models from micro-CT scans of these tibiae using three popular element types (10-node tetrahedral, 8-node hexahedral, and 20-node hexahedral). Without partial volume management, the models over-predicted the torsional rigidity compared to physical biomechanical tests. To address this problem, we implemented a dual-zone material model to treat elements that overlap low-density surface voxels as soft tissue rather than bone. Afterin situinverse optimization, the dual-zone material model produced strong correlations and high absolute agreement between the virtual and physical tests. This suggests that with appropriate partial volume management, virtual mechanical testing can be a reliable surrogate for physical biomechanical testing. For maximum flexibility in partial volume management regardless of element type, we recommend the use of the following dual-zone material model for ovine tibiae: soft-tissue cutoff density of 665 mgHA/cm3with a soft tissue modulus of 50 MPa (below cutoff) and a density-modulus conversion slope of 10,225 MPa-cm3/mgHA for bone (above cutoff).
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影响因子:
1.8
作者:
Knowles NK;Reeves JM;Ferreira LM
通讯作者:
Ferreira LM
影响因子:
1.9
作者:
Jörn Rittweger;I. Michaelis;M. Giehl;P. Wüsecke;D. Felsenberg
通讯作者:
D. Felsenberg
影响因子:
3.8
作者:
Pakdel, Amirreza;Mainprize, James G.;Whyne, Cari M.
通讯作者:
Whyne, Cari M.
DOI:
10.1080/10255842.2012.673595
发表时间:
2014-02-17
影响因子:
1.6
作者:
Peleg, Eran;Herblum, Ryan;Whyne, Cari
通讯作者:
Whyne, Cari
影响因子:
4.6
作者:
Inglis B;Schwarzenberg P;Klein K;von Rechenberg B;Darwiche S;Dailey HL
通讯作者:
Dailey HL