Individual Modeling Method Based on the X-Ray CT Images. Influence of Partial Volume Effect on the Modeling.

教夫, 伊能; 道彦, 小関; 宏太郎, 槇

doi:10.1299/kikaia.69.109

Cited by 5 publications

(3 citation statements)

References 3 publications

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“…Stress analysis for a bone requires not only precision in shape but also proper setting of material constants for the model. 6 In the MF software used, the elastic modulus of the mandibular bone was calculated from the averages over the volume of each element, 17 which greatly depends on the mesh size. A finer mesh size is certainly more effective in the regions with substantial change in the elastic modulus in each part of the element.…”

Section: Discussionmentioning

confidence: 99%

“…To date, there have been many published studies dealing with the use of computed tomography (CT) to acquire detailed information regarding the anatomical architecture of the human mandible. [5][6][7][8][9][10][11][12] When generating a 3D FE model constructed from CT data, it is usually necessary to apply several types of software and/or tools for extracting, 3D modeling, and meshing, which, in turn, requires a great deal of time, skill, and financial resources.…”

Section: Introductionmentioning

confidence: 99%

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Dental application of novel finite element analysis software for three-dimensional finite element modeling of a dentulous mandible from its computed tomography images

Nakamura

Tajima

Chen

et al. 2013

Proc Inst Mech Eng H

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This study focused on the application of novel finite-element analysis software for constructing a finite-element model from the computed tomography data of a human dentulous mandible. The finite-element model is necessary for evaluating the mechanical response of the alveolar part of the mandible, resulting from occlusal force applied to the teeth during biting. Commercially available patient-specific general computed tomography-based finite-element analysis software was solely applied to the finite-element analysis for the extraction of computed tomography data. The mandibular bone with teeth was extracted from the original images. Both the enamel and the dentin were extracted after image processing, and the periodontal ligament was created from the segmented dentin. The constructed finite-element model was reasonably accurate using a total of 234,644 nodes and 1,268,784 tetrahedral and 40,665 shell elements. The elastic moduli of the heterogeneous mandibular bone were determined from the bone density data of the computed tomography images. The results suggested that the software applied in this study is both useful and powerful for creating a more accurate three-dimensional finite-element model of a dentulous mandible from the computed tomography data without the need for any other software.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dental application of novel finite element analysis software for three-dimensional finite element modeling of a dentulous mandible from its computed tomography images

Nakamura

Tajima

Chen

et al. 2013

Proc Inst Mech Eng H

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“…2, No.3, 2008 This study aims to establish a highly accurate non-destructive inspection technique for devices with various materials using x-ray CT imaging. Our initial study examined the accuracy of medical CT images, and proposed correction methods for the partial volume effect, which is caused by the thickness of the x-ray beam (1), (2) . This effect provides ambiguous CT images, especially at the surface of a scanning subject.…”

Section: Journal Of Solid Mechanics and Materials Engineeringmentioning

confidence: 99%

CT Image Reconstruction Algorithm to Reduce Metal Artifact

Koseki

Hashimoto

Sato

et al. 2008

JMMP

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Micro computed tomography (µCT) is quite useful in the nondestructive evaluation of devices with complicated internal structures. However, a large difference in x-ray absorption coefficients of the materials produces streak and star pattern artifacts in a CT image. These artifacts, which are called "metal artifacts", make it difficult to inspect an image of the device. Hence, this study strives to develop a new reconstruction method that reduces the artifacts from images. In this paper, we first discuss the cause of the artifacts using CT data of a sample. Next, we propose a CT reconstruction algorithm to reduce the artifacts. The basic idea of the algorithm is that it corrects the projection data. The shapes of high density parts such as metals are extracted by a threshold method and projection data are replaced to consistent values. Finally, we apply the method to select devices, and confirm that the method is applicable to nondestructive inspections.

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Finite-element modelling of non-destructive material evaluation, an addendum: a bibliography (1997–2003)

Mackerle

2004

Modelling Simul. Mater. Sci. Eng.

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This paper gives a bibliographical review of the finite-element methods applied to the non-destructive evaluation of materials. It is a continuation of the same paper published in Modelling Simul. Mater. Sci. 7 (1999) 107-145. The bibliography at the end of this paper contains references to papers, conference proceedings and theses/dissertations on the subject that were published between 1997 and 2003. The following topics are included: electrical, magnetic and electromagnetic methods; sonic methods; mechanical methods; optical methods; condition monitoring and other methods. A total of 858 references are listed in the appendix.

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Individual Modeling Method Based on the X-Ray CT Images. Influence of Partial Volume Effect on the Modeling.

Cited by 5 publications

References 3 publications

Dental application of novel finite element analysis software for three-dimensional finite element modeling of a dentulous mandible from its computed tomography images

Dental application of novel finite element analysis software for three-dimensional finite element modeling of a dentulous mandible from its computed tomography images

CT Image Reconstruction Algorithm to Reduce Metal Artifact

Finite-element modelling of non-destructive material evaluation, an addendum: a bibliography (1997–2003)

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