title: Reproducibility of CT-based bone texture parameters of cancellous calf bone samples: influence of slice thickness.
abstract: Bone microarchitecture is an important determinant of the fracture risk, independently of bone mineral density. At present, bone biopsy is required for microarchitecture assessment, and accessible non-invasive techniques are needed. In this study, we tested the short-term reproducibility and parameter changes of a non-invasive method for microarchitecture assessment with a medical computed tomography. Texture parameters (run lengths and co-occurrence) were extracted from bone sample images. Reproducibility and the influence of slice thickness (1, 3, 5 and 8mm) were also studied. After five repositionings, short-term reproducibility was found to be good. All run length parameters but one fell significantly with increasing slice thickness. Co-occurrence parameters showed different patterns of change. Short-term coefficients of variation of texture parameters used to assess bone microarchitecture were similar to those obtained elsewhere with other techniques. The results were influenced by slice thicknesses, emphasizing the importance of the conditions of acquisition.
authors.affiliation: INSERM, U642, LTSI, Campus Beaulieu, Bat 22, 35042 Rennes Cédex, France. pascal.guggenbuhl@chu-rennes.fr
authors.forename: Pascal
authors.initials: P
authors.lastname: Guggenbuhl
authors.forename: Daniel
authors.initials: D
authors.lastname: Chappard
authors.forename: Mireille
authors.initials: M
authors.lastname: Garreau
authors.forename: Jean-Yves
authors.initials: JY
authors.lastname: Bansard
authors.forename: Gérard
authors.initials: G
authors.lastname: Chales
authors.forename: Yan
authors.initials: Y
authors.lastname: Rolland
mesh_terms: D019412:Anatomy, Cross-Sectional / Q000379:methods*; D000818:Animals; D001842:Bone and Bones / Q000000981:diagnostic imaging*; D002417:Cattle; D011856:Radiographic Image Enhancement / Q000379:methods*; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed / Q000379:methods*