Prediction of the Vertebral Strength Using a Finite Element Model Derived From Low-Dose Biplanar Imaging

Brosses, Emilie Sapin - de; Jolivet, Erwan; Travert, Christophe; Mitton, David; Skalli, Wafa

doi:10.1097/brs.0b013e3182293628

Cited by 17 publications

(16 citation statements)

References 30 publications

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“…This study investigated numerically the relative impact of geometry, material properties, and loading conditions on a vertebral finite element model [27]. This model takes only a few minutes to compute, with a relatively low number of elements (about 4,300), and is accessible without performing a CT-scan of the subject.…”

Section: Discussionmentioning

confidence: 99%

“…The maximal strain was the maximum value of the principal strain computed in each element. As in a previous study [27], fracture load was defined as the load at which a minimum volume of 1 cm 3 of cortico-cancellous bone reached a 1.5% strain or over. Fracture load varied by less than 5% (root mean square error) when the number of elements was raised from about 4,300 to 34,000.…”

Section: Discussionmentioning

confidence: 99%

“…A subject-specific finite element model was built from biplanar radiography following the method described by Sapin-de Brosses et al [27]. Briefly, the vertebrae were radiographed in antero-posterior and lateral view with the EOS low dose imaging system (EOS imaging, Paris, France), at two different energy levels (70 kVp-250 mA and 120 kVp-250 mA).…”

Section: Vertebral Modelmentioning

confidence: 99%

“…From these biplanar radiographs, the 3D geometry and the areal BMD were calculated for each vertebra with specific softwares [12,26]. A subjectspecific mesh was built using geometric parameters computed on the 3D reconstructions [27]. Two materials with linear constitutive law were considered: trabecular bone (TB), and a 3 mm thick outer layer of cortico-trabecular bone (CTB) elements (Fig.…”

Section: Vertebral Modelmentioning

confidence: 99%

“…A subject-specific finite element model using a smooth geometry issued from low dose biplanar radiography, such as Dual X-ray Absorptiometry (DXA) [16,17] and the EOS system, and personalized material properties from BMD [26] has shown promising results in predicting vertebral strength in anterior bending (R 2 = 0.79, root mean square error = 367 N) [27]. A very good approximation of geometry can now be attained in a short reconstruction time from biplanar radiographs (1 mm shape accuracy [12]).…”

Section: Introductionmentioning

confidence: 99%

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Sensitivity of patient-specific vertebral finite element model from low dose imaging to material properties and loading conditions

Travert

Jolivet

Brosses

et al. 2011

Med Biol Eng Comput

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Patient-specific modeling could help in predicting vertebral osteoporotic fracture. The accuracy requirement for input data available in clinical routine is related to the model sensitivity. The objective of this study is to assess the relative impact of material properties and of loading conditions on vertebral strength using a finite element model. Fourteen subject-specific vertebral finite element models were used to investigate the effect of material properties and loading conditions. A design of experiment was set to study three parameters: Young's moduli of trabecular bone and cortico-trabecular bone (outer 3 mm of the vertebra), and load location. Cortico-trabecular bone modulus variation from 270 to 478 MPa made fracture load vary from 22 to 51%, depending on other parameters. Trabecular bone modulus variation from 115 to 258 MPa made fracture load vary from 11 to 43%. Displacing load location by 1 cm resulted in a mean decrease of 48-60% of the fracture load. Anterior bending induced strain concentration in vertebral anterior wall. Material properties of both type of bone have about the same effect. Load location is the most sensitive. Effort should be made to take into account patients' specific load distribution regarding its sagittal balance, in addition to bone properties.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Vertebral Modelmentioning

confidence: 99%

Section: Vertebral Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Sensitivity of patient-specific vertebral finite element model from low dose imaging to material properties and loading conditions

Travert

Jolivet

Brosses

et al. 2011

Med Biol Eng Comput

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Comparison of Two Models to Predict Vertebral Failure Loads on the Same Experimental Dataset

Allard,

Heidsieck,

Bermond

et al. 2024

Lecture Notes in Computational Vision and Biomechanics

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EOS^® biplanar X-ray imaging: Concept, developments, benefits, and limitations

Melhem

Assi

Rachkidi

et al. 2016

Journal of Children's Orthopaedics

211

136

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PurposeIn 1992, Georges Charpak invented a new type of X-ray detector, which in turn led to the development of the EOS® 2D/3D imaging system. This system takes simultaneous anteroposterior and lateral 2D images of the whole body and can be utilized to perform 3D reconstruction based on statistical models. The purpose of this review is to present the state of the art for this EOS® imaging technique, to report recent developments and advances in the technique, and to stress its benefits while also noting its limitations.MethodsThe review was based on a thorough literature search on the subject as well as personal experience gained from many years of using the EOS® system.ResultsWhile EOS® imaging could be proposed for many applications, it is most useful in relation to scoliosis and sagittal balance, due to its ability to take simultaneous orthogonal images while the patient is standing, to perform 3D reconstruction, and to determine various relationships among adjacent segments (cervical spine, pelvis, and lower limbs). The technique has also been validated for the study of pelvic and lower-limb deformity and pathology in adult and pediatric populations; in such a study it has the advantage of allowing the measurement of torsional deformity, which classically requires a CT scan.ConclusionsThe major advantages of EOS® are the relatively low dose of radiation (50–80 % less than conventional X-rays) that the patient receives and the possibility of obtaining a 3D reconstruction of the bones. However, this 3D reconstruction is not created automatically; a well-trained operator is required to generate it. The EOS® imaging technique has proven itself to be a very useful research and diagnostic tool.

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Prediction of the Vertebral Strength Using a Finite Element Model Derived From Low-Dose Biplanar Imaging

Abstract: This work underlines the potential of low-dose biplanar x-ray devices to make subject-specific FEMs for prediction of vertebral strength.

Cited by 17 publications

References 30 publications

Sensitivity of patient-specific vertebral finite element model from low dose imaging to material properties and loading conditions

Sensitivity of patient-specific vertebral finite element model from low dose imaging to material properties and loading conditions

Comparison of Two Models to Predict Vertebral Failure Loads on the Same Experimental Dataset

EOS^® biplanar X-ray imaging: Concept, developments, benefits, and limitations

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Prediction of the Vertebral Strength Using a Finite Element Model Derived From Low-Dose Biplanar Imaging

Abstract: This work underlines the potential of low-dose biplanar x-ray devices to make subject-specific FEMs for prediction of vertebral strength.

Cited by 17 publications

References 30 publications

Sensitivity of patient-specific vertebral finite element model from low dose imaging to material properties and loading conditions

Sensitivity of patient-specific vertebral finite element model from low dose imaging to material properties and loading conditions

Comparison of Two Models to Predict Vertebral Failure Loads on the Same Experimental Dataset

EOS® biplanar X-ray imaging: Concept, developments, benefits, and limitations

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Product

Resources

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EOS^® biplanar X-ray imaging: Concept, developments, benefits, and limitations