Three-dimensional X-ray absorptiometry (3D-XA): a method for reconstruction of human bones using a dual X-ray absorptiometry device

被引:0
|
作者
S. Kolta
A. Le Bras
D. Mitton
V. Bousson
J. A. de Guise
J. Fechtenbaum
J. D. Laredo
C. Roux
W. Skalli
机构
[1] Cochin Hospital,Rheumatology Department
[2] Assistance Publique,Radiology Department
[3] Hôpitaux de Paris–Université René Descartes,Laboratoire de Recherches Orthopédiques
[4] Laboratoire de BioMécanique–ENSAM-CNRS UMR 8005,Centre d’Evaluation des Maladies Osseuses
[5] Lariboisière Hospital,undefined
[6] Assistance Publique,undefined
[7] Hôpitaux de Paris,undefined
[8] CNRS UMR 7052,undefined
[9] Laboratoire de recherche en Imagerie et Orthopédie,undefined
[10] Hôpital Cochin AP-HP,undefined
来源
Osteoporosis International | 2005年 / 16卷
关键词
Accuracy; 3D reconstruction; Dual X-Ray absorptiometry; Hip fracture risk; Proximal femur; Reproducibility;
D O I
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中图分类号
学科分类号
摘要
Three-dimensional accurate evaluation of the geometry of the proximal femur may be helpful for hip fracture risk evaluation. The purpose of this study was to apply and validate a stereo-radiographic 3D reconstruction method of the proximal femur, using contours identification from biplanar DXA images. Twenty-five excised human proximal femurs were investigated using a standard DXA unit. Three-dimensional personalized models were reconstructed using a dedicated non-stereo corresponding contours (NSCC) algorithm. Three-dimensional CT-scan reconstructions obtained on a clinical CT-scan unit were defined as geometric references for the comparison protocol, in order to assess accuracy and reproducibility of the 3D stereo-radiographic reconstructions. The precision of a set of 3D geometric parameters (femoral-neck axis length, mid-neck cross-section area, neck-shaft angle), obtained from stereo-radiographic models was also evaluated. This study shows that the NSCC method may be applied to obtain 3D reconstruction from biplanar DXA acquisitions. Applied to the proximal femur, this method showed good accuracy as compared with high-resolution personalized CT-scan models (mean error = 0.8 mm). Moreover, precision study for the set of 3D parameters yielded coefficients of variation lower than 5%. This is the first study providing 3D geometric parameters from standard 2D DXA images using the NSCC method. It has good accuracy and reproducibility in the present study on cadaveric femurs. In vivo prospective studies are needed to evaluate its discriminating potential on hip fracture risk prediction.
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页码:969 / 976
页数:7
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