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Título del libro: Proceedings Of The 19th International Symposium On Medical Information Processing And Analysis, Sipaim 2023
Título del capítulo: In Vivo Human Vertebra Image Reconstruction and Mechanical Simulation

Autores UNAM:
ARMANDO ORTIZ PRADO; ISMELI ALFONSO LOPEZ;

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Autores externos:

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Idioma:

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Año de publicación:
2023

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Palabras clave:

3D printing; Bone; Compression testing; Computerized tomography; Finite element method; Rapid prototyping; Three dimensional computer graphics; Virtual reality; Cortical bone; Cortical tissues; Densitometry; Finite elements simulation; Images processing; Images reconstruction; In-vivo; Mechanical simulations; Vertebra; Vertebra images; Failure (mechanical)

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Resumen:

Computational tomography-based scans contain information that can be used to reconstruct a human vertebra and, along with densitometry studies, help in the understanding of bone failure. Though the human vertebra is constituted by trabecular and cortical tissue, in patients suffering osteoporosis, mechanical loads are primarily absorbed by the cortical wall. Through the use of conventional tomography and image processing, 3D virtual and rapid-prototyping vertebra models were generated in order to analyze stresses and failure modes of the cortical wall. An in vivo digital model of a human lumbar vertebra was developed using common tomography images, and a reconstruction of the cortical tissue of a male patient was done to obtain a virtual model and used in mechanical finite element simulations as well as in 3D printing with ABS material to perform mechanical compression tests. Both ABS and finite element models, obtained from the patient's tomography images, suffer failure in a similar mode and location, even though the accuracy of the image processing analysis is not very high (0.25 mm). The mechanical failure of the ABS model during compression can be accurately predicted by the finite element simulation and, the combination of the rapid prototyping models and the finite element simulation may be a good approximation to understand vertebra stresses and failure zones due to bone ailments, specially if new materials with properties closer to bone are used in prototyping machines. © 2023 IEEE.

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Entidades citadas de la UNAM:

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Fuente:



ISBN:
9798350325232
Editorial:
Institute of Electrical and Electronics Engineers Inc.

Tipo de producto:
Conference Paper

DOI:
10.1109/SIPAIM56729.2023.10373553