The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Francoise Peyrin - One of the best experts on this subject based on the ideXlab platform.
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Synchrotron Radiation Micro-CT at the Micrometer Scale for the Analysis of the Three-Dimensional Morphology of Microcracks in Human Trabecular Bone
PLoS ONE, 2011Co-Authors: Aymeric Larrue, Aline Rattner, Zsolt-andrei Peter, Norbert Laroche, Cécile Olivier, Laurence Vico, Francoise PeyrinAbstract:Bone quality is an important concept to explain bone fragility in addition to bone mass. Among bone quality factors, microdamage which appears in daily life is thought to have a marked impact on bone strength and plays a major role in the repair process. The starting point for all studies designed to further our understanding of how bone microdamage initiate or dissipate energy, or to investigate the impact of age, gender or disease, remains reliable observation and measurement of microdamage. In this study, 3D Synchrotron Radiation (SR) micro-CT at the micrometric scale was coupled to image analysis for the three-dimensional characterization of bone microdamage in human trabecular bone specimens taken from femoral heads. Specimens were imaged by 3D SR micro-CT with a voxel size of 1.4 mm. A new tailored 3D image analysis technique was developed to segment and quantify Microcracks. Microcracks from human trabecular bone were observed in different tomographic sections as well as from 3D renderings. New 3D quantitative measurements on the microcrack density and morphology are reported on five specimens. The 3D microcrack density was found between 3.1 and 9.4/mm3 corresponding to a 2D density between 0.55 and 0.76 /mm2. The microcrack length and width measured in 3D on five selected microcrack ranged respectively from 164 mm to 209 mm and 100 mm to 120 mm. This is the first time that various Microcracks in unloaded human trabecular bone-from the simplest linear crack to more complex cross-hatch cracks-have been examined and quantified by 3D imaging at this scale. The suspected complex morphology of Microcracks is here considerably more evident than in the 2D observations. In conclusion, this technique opens new perspective for the 3D investigation of Microcracks and the impact of age, disease or treatment.
Aymeric Larrue - One of the best experts on this subject based on the ideXlab platform.
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Synchrotron Radiation Micro-CT at the Micrometer Scale for the Analysis of the Three-Dimensional Morphology of
2016Co-Authors: Microcracks Human, Trabecular Bone, Aymeric Larrue, Aline Rattner, Zsolt-andrei Peter, Norbert LarocheAbstract:Bone quality is an important concept to explain bone fragility in addition to bone mass. Among bone quality factors, microdamage which appears in daily life is thought to have a marked impact on bone strength and plays a major role in the repair process. The starting point for all studies designed to further our understanding of how bone microdamage initiate or dissipate energy, or to investigate the impact of age, gender or disease, remains reliable observation and measurement of microdamage. In this study, 3D Synchrotron Radiation (SR) micro-CT at the micrometric scale was coupled to image analysis for the three-dimensional characterization of bone microdamage in human trabecular bone specimens taken from femoral heads. Specimens were imaged by 3D SR micro-CT with a voxel size of 1.4 mm. A new tailored 3D image analysis technique was developed to segment and quantify Microcracks. Microcracks from human trabecular bone were observed in different tomographic sections as well as from 3D renderings. New 3D quantitative measurements on the microcrack density and morphology are reported on five specimens. The 3D microcrack density was found between 3.1 and 9.4/mm3 corresponding to a 2D density between 0.55 and 0.76 /mm2. The microcrack length and width measured in 3D on five selected microcrack ranged respectively from 164 mm to 209 mm and 100 mm to 120 mm. This is the first time that various Microcracks in unloaded human trabecular bone- from the simplest linear crack to more complex cross-hatch cracks- have been examined and quantified by 3D imaging at this scale. The suspected complex morphology of Microcracks is her
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Synchrotron Radiation Micro-CT at the Micrometer Scale for the Analysis of the Three-Dimensional Morphology of Microcracks in Human Trabecular Bone
PLoS ONE, 2011Co-Authors: Aymeric Larrue, Aline Rattner, Zsolt-andrei Peter, Norbert Laroche, Cécile Olivier, Laurence Vico, Francoise PeyrinAbstract:Bone quality is an important concept to explain bone fragility in addition to bone mass. Among bone quality factors, microdamage which appears in daily life is thought to have a marked impact on bone strength and plays a major role in the repair process. The starting point for all studies designed to further our understanding of how bone microdamage initiate or dissipate energy, or to investigate the impact of age, gender or disease, remains reliable observation and measurement of microdamage. In this study, 3D Synchrotron Radiation (SR) micro-CT at the micrometric scale was coupled to image analysis for the three-dimensional characterization of bone microdamage in human trabecular bone specimens taken from femoral heads. Specimens were imaged by 3D SR micro-CT with a voxel size of 1.4 mm. A new tailored 3D image analysis technique was developed to segment and quantify Microcracks. Microcracks from human trabecular bone were observed in different tomographic sections as well as from 3D renderings. New 3D quantitative measurements on the microcrack density and morphology are reported on five specimens. The 3D microcrack density was found between 3.1 and 9.4/mm3 corresponding to a 2D density between 0.55 and 0.76 /mm2. The microcrack length and width measured in 3D on five selected microcrack ranged respectively from 164 mm to 209 mm and 100 mm to 120 mm. This is the first time that various Microcracks in unloaded human trabecular bone-from the simplest linear crack to more complex cross-hatch cracks-have been examined and quantified by 3D imaging at this scale. The suspected complex morphology of Microcracks is here considerably more evident than in the 2D observations. In conclusion, this technique opens new perspective for the 3D investigation of Microcracks and the impact of age, disease or treatment.
Norbert Laroche - One of the best experts on this subject based on the ideXlab platform.
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Synchrotron Radiation Micro-CT at the Micrometer Scale for the Analysis of the Three-Dimensional Morphology of
2016Co-Authors: Microcracks Human, Trabecular Bone, Aymeric Larrue, Aline Rattner, Zsolt-andrei Peter, Norbert LarocheAbstract:Bone quality is an important concept to explain bone fragility in addition to bone mass. Among bone quality factors, microdamage which appears in daily life is thought to have a marked impact on bone strength and plays a major role in the repair process. The starting point for all studies designed to further our understanding of how bone microdamage initiate or dissipate energy, or to investigate the impact of age, gender or disease, remains reliable observation and measurement of microdamage. In this study, 3D Synchrotron Radiation (SR) micro-CT at the micrometric scale was coupled to image analysis for the three-dimensional characterization of bone microdamage in human trabecular bone specimens taken from femoral heads. Specimens were imaged by 3D SR micro-CT with a voxel size of 1.4 mm. A new tailored 3D image analysis technique was developed to segment and quantify Microcracks. Microcracks from human trabecular bone were observed in different tomographic sections as well as from 3D renderings. New 3D quantitative measurements on the microcrack density and morphology are reported on five specimens. The 3D microcrack density was found between 3.1 and 9.4/mm3 corresponding to a 2D density between 0.55 and 0.76 /mm2. The microcrack length and width measured in 3D on five selected microcrack ranged respectively from 164 mm to 209 mm and 100 mm to 120 mm. This is the first time that various Microcracks in unloaded human trabecular bone- from the simplest linear crack to more complex cross-hatch cracks- have been examined and quantified by 3D imaging at this scale. The suspected complex morphology of Microcracks is her
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Synchrotron Radiation Micro-CT at the Micrometer Scale for the Analysis of the Three-Dimensional Morphology of Microcracks in Human Trabecular Bone
PLoS ONE, 2011Co-Authors: Aymeric Larrue, Aline Rattner, Zsolt-andrei Peter, Norbert Laroche, Cécile Olivier, Laurence Vico, Francoise PeyrinAbstract:Bone quality is an important concept to explain bone fragility in addition to bone mass. Among bone quality factors, microdamage which appears in daily life is thought to have a marked impact on bone strength and plays a major role in the repair process. The starting point for all studies designed to further our understanding of how bone microdamage initiate or dissipate energy, or to investigate the impact of age, gender or disease, remains reliable observation and measurement of microdamage. In this study, 3D Synchrotron Radiation (SR) micro-CT at the micrometric scale was coupled to image analysis for the three-dimensional characterization of bone microdamage in human trabecular bone specimens taken from femoral heads. Specimens were imaged by 3D SR micro-CT with a voxel size of 1.4 mm. A new tailored 3D image analysis technique was developed to segment and quantify Microcracks. Microcracks from human trabecular bone were observed in different tomographic sections as well as from 3D renderings. New 3D quantitative measurements on the microcrack density and morphology are reported on five specimens. The 3D microcrack density was found between 3.1 and 9.4/mm3 corresponding to a 2D density between 0.55 and 0.76 /mm2. The microcrack length and width measured in 3D on five selected microcrack ranged respectively from 164 mm to 209 mm and 100 mm to 120 mm. This is the first time that various Microcracks in unloaded human trabecular bone-from the simplest linear crack to more complex cross-hatch cracks-have been examined and quantified by 3D imaging at this scale. The suspected complex morphology of Microcracks is here considerably more evident than in the 2D observations. In conclusion, this technique opens new perspective for the 3D investigation of Microcracks and the impact of age, disease or treatment.
Ji Zhang - One of the best experts on this subject based on the ideXlab platform.
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effects of microcrack damage on fracture behavior of tial alloy part ii load controlled tensile test
Journal of Materials Science, 2008Co-Authors: Jian Hong Chen, Ji ZhangAbstract:Specimens of a fully lamellar TiAl alloy and a duplex TiAl alloy were tensile tested using load-controlled procedure. The Microcracks were measured for each specimen as it was subjected to various preloading–unloading processes. Loading–unloading–reloading processes of in-situ tensile tests were carried out in a scanning electron microscope (SEM). Effects of microcrack damage on the deformation and fracture behavior were evaluated. The following results of microcrack-damage on deformation and fracture behavior of TiAl alloy were found: (1) The apparent plastic elongation resulted mainly from plastic strain. The elongation caused by Microcracks is negligible. (2) No appreciable effects of microcrack damage on the apparent elastic modulus could be found. (3) Microcracks damage produced at higher preloading reduced the fracture stress, however, that produced at lower preloading gave diminished effects.
Aline Rattner - One of the best experts on this subject based on the ideXlab platform.
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Synchrotron Radiation Micro-CT at the Micrometer Scale for the Analysis of the Three-Dimensional Morphology of
2016Co-Authors: Microcracks Human, Trabecular Bone, Aymeric Larrue, Aline Rattner, Zsolt-andrei Peter, Norbert LarocheAbstract:Bone quality is an important concept to explain bone fragility in addition to bone mass. Among bone quality factors, microdamage which appears in daily life is thought to have a marked impact on bone strength and plays a major role in the repair process. The starting point for all studies designed to further our understanding of how bone microdamage initiate or dissipate energy, or to investigate the impact of age, gender or disease, remains reliable observation and measurement of microdamage. In this study, 3D Synchrotron Radiation (SR) micro-CT at the micrometric scale was coupled to image analysis for the three-dimensional characterization of bone microdamage in human trabecular bone specimens taken from femoral heads. Specimens were imaged by 3D SR micro-CT with a voxel size of 1.4 mm. A new tailored 3D image analysis technique was developed to segment and quantify Microcracks. Microcracks from human trabecular bone were observed in different tomographic sections as well as from 3D renderings. New 3D quantitative measurements on the microcrack density and morphology are reported on five specimens. The 3D microcrack density was found between 3.1 and 9.4/mm3 corresponding to a 2D density between 0.55 and 0.76 /mm2. The microcrack length and width measured in 3D on five selected microcrack ranged respectively from 164 mm to 209 mm and 100 mm to 120 mm. This is the first time that various Microcracks in unloaded human trabecular bone- from the simplest linear crack to more complex cross-hatch cracks- have been examined and quantified by 3D imaging at this scale. The suspected complex morphology of Microcracks is her
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Synchrotron Radiation Micro-CT at the Micrometer Scale for the Analysis of the Three-Dimensional Morphology of Microcracks in Human Trabecular Bone
PLoS ONE, 2011Co-Authors: Aymeric Larrue, Aline Rattner, Zsolt-andrei Peter, Norbert Laroche, Cécile Olivier, Laurence Vico, Francoise PeyrinAbstract:Bone quality is an important concept to explain bone fragility in addition to bone mass. Among bone quality factors, microdamage which appears in daily life is thought to have a marked impact on bone strength and plays a major role in the repair process. The starting point for all studies designed to further our understanding of how bone microdamage initiate or dissipate energy, or to investigate the impact of age, gender or disease, remains reliable observation and measurement of microdamage. In this study, 3D Synchrotron Radiation (SR) micro-CT at the micrometric scale was coupled to image analysis for the three-dimensional characterization of bone microdamage in human trabecular bone specimens taken from femoral heads. Specimens were imaged by 3D SR micro-CT with a voxel size of 1.4 mm. A new tailored 3D image analysis technique was developed to segment and quantify Microcracks. Microcracks from human trabecular bone were observed in different tomographic sections as well as from 3D renderings. New 3D quantitative measurements on the microcrack density and morphology are reported on five specimens. The 3D microcrack density was found between 3.1 and 9.4/mm3 corresponding to a 2D density between 0.55 and 0.76 /mm2. The microcrack length and width measured in 3D on five selected microcrack ranged respectively from 164 mm to 209 mm and 100 mm to 120 mm. This is the first time that various Microcracks in unloaded human trabecular bone-from the simplest linear crack to more complex cross-hatch cracks-have been examined and quantified by 3D imaging at this scale. The suspected complex morphology of Microcracks is here considerably more evident than in the 2D observations. In conclusion, this technique opens new perspective for the 3D investigation of Microcracks and the impact of age, disease or treatment.
