title: Experimental assessment of bone mineral density using quantitative computed tomography in holstein dairy cows.
abstract: The aim of this study was to assess the measurement of bone mineral density (BMD) by quantitative computed tomography (QCT), comparing the relationships of BMD between QCT and dual-energy X-ray absorptiometry (DXA) and between QCT and radiographic absorptiometry (RA) in the metacarpal bone of Holstein dairy cows (n=27). A significant positive correlation was found between QCT and DXA measurements (r=0.70, P<0.01), and a significant correlation was found between QCT and RA measurements (r=0.50, P<0.01). We conclude that QCT provides quantitative evaluation of BMD in dairy cows, because BMD measured by QCT showed positive correlations with BMD measured by the two conventional methods: DXA and RA.
authors.affiliation: Nippon Beet Sugar Manufacturing Co., Ltd., Obihiro, Hokkaido 080-0831, Japan.
authors.forename: Ayami
authors.initials: A
authors.lastname: Maetani
authors.forename: Megumi
authors.initials: M
authors.lastname: Itoh
authors.forename: Kahori
authors.initials: K
authors.lastname: Nishihara
authors.forename: Takahiro
authors.initials: T
authors.lastname: Aoki
authors.forename: Masayuki
authors.initials: M
authors.lastname: Ohtani
authors.forename: Kenichi
authors.initials: K
authors.lastname: Shibano
authors.forename: Mitsunori
authors.initials: M
authors.lastname: Kayano
authors.forename: Kazutaka
authors.initials: K
authors.lastname: Yamada
mesh_terms: D015502:Absorptiometry, Photon / Q000662:veterinary*; D000818:Animals; D015519:Bone Density; D002417:Cattle; D005260:Female; D014057:Tomography, X-Ray Computed / Q000662:veterinary*