dorsal/arxiv
View SchemaOrbital and Maxillofacial Computer Aided Surgery: Patient-Specific Finite Element Models To Predict Surgical Outcomes
| Authors | Vincent Luboz, Matthieu Chabanas, Pascal Swider, Yohan Payan |
|---|---|
| Categories | |
| ArXiv ID | physics/0606144 |
| URL | https://arxiv.org/abs/physics/0606144 |
| Journal | Computer Methods in Biomechanics and Biomedical Engineering 8 (4) (2005) 259-265 |
Abstract
This paper addresses an important issue raised for the clinical relevance of Computer-Assisted Surgical applications, namely the methodology used to automatically build patient-specific Finite Element (FE) models of anatomical structures. From this perspective, a method is proposed, based on a technique called the Mesh-Matching method, followed by a process that corrects mesh irregularities. The Mesh-Matching algorithm generates patient-specific volume meshes from an existing generic model. The mesh regularization process is based on the Jacobian matrix transform related to the FE reference element and the current element. This method for generating patient-specific FE models is first applied to Computer-Assisted maxillofacial surgery, and more precisely to the FE elastic modelling of patient facial soft tissues. For each patient, the planned bone osteotomies (mandible, maxilla, chin) are used as boundary conditions to deform the FE face model, in order to predict the aesthetic outcome of the surgery. Seven FE patient-specific models were successfully generated by our method. For one patient, the prediction of the FE model is qualitatively compared with the patient's post-operative appearance, measured from a Computer Tomography scan. Then, our methodology is applied to Computer-Assisted orbital surgery. It is, therefore, evaluated for the generation of eleven patient-specific FE poroelastic models of the orbital soft tissues. These models are used to predict the consequences of the surgical decompression of the orbit. More precisely, an average law is extrapolated from the simulations carried out for each patient model. This law links the size of the osteotomy (i.e. the surgical gesture) and the backward displacement of the eyeball (the consequence of the surgical gesture).
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"abstract": "This paper addresses an important issue raised for the clinical relevance of\nComputer-Assisted Surgical applications, namely the methodology used to\nautomatically build patient-specific Finite Element (FE) models of anatomical\nstructures. From this perspective, a method is proposed, based on a technique\ncalled the Mesh-Matching method, followed by a process that corrects mesh\nirregularities. The Mesh-Matching algorithm generates patient-specific volume\nmeshes from an existing generic model. The mesh regularization process is based\non the Jacobian matrix transform related to the FE reference element and the\ncurrent element. This method for generating patient-specific FE models is first\napplied to Computer-Assisted maxillofacial surgery, and more precisely to the\nFE elastic modelling of patient facial soft tissues. For each patient, the\nplanned bone osteotomies (mandible, maxilla, chin) are used as boundary\nconditions to deform the FE face model, in order to predict the aesthetic\noutcome of the surgery. Seven FE patient-specific models were successfully\ngenerated by our method. For one patient, the prediction of the FE model is\nqualitatively compared with the patient\u0027s post-operative appearance, measured\nfrom a Computer Tomography scan. Then, our methodology is applied to\nComputer-Assisted orbital surgery. It is, therefore, evaluated for the\ngeneration of eleven patient-specific FE poroelastic models of the orbital soft\ntissues. These models are used to predict the consequences of the surgical\ndecompression of the orbit. More precisely, an average law is extrapolated from\nthe simulations carried out for each patient model. This law links the size of\nthe osteotomy (i.e. the surgical gesture) and the backward displacement of the\neyeball (the consequence of the surgical gesture).",
"arxiv_id": "physics/0606144",
"authors": [
"Vincent Luboz",
"Matthieu Chabanas",
"Pascal Swider",
"Yohan Payan"
],
"categories": [
"physics.med-ph"
],
"journal_ref": "Computer Methods in Biomechanics and Biomedical Engineering 8 (4)\n (2005) 259-265",
"title": "Orbital and Maxillofacial Computer Aided Surgery: Patient-Specific Finite Element Models To Predict Surgical Outcomes",
"url": "https://arxiv.org/abs/physics/0606144"
},
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