Experimental assessment of bone mineral density using quantitative computed tomography in holstein dairy cows

• DOI: 10.1292/jvms.15-0642
• Publication Date: 2016-04-13T18:04:21Z
• Authors: Ayami MAETANI; Megumi ITOH; Kahori NISHIHARA; Takahiro AOKI; Masayuki OHTANI; Kenichi SHIBANO; Mitsunori KAYANO; Kazutaka YAMADA
• Keywords: Absorptiometry, Photon; Bone Density; 0402 animal and dairy science; Animals; Surgery; Cattle; Female; 04 agricultural and veterinary sciences; Tomography, X-Ray Computed

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.