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

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  • MAETANI Ayami
    Nippon Beet Sugar Manufacturing Co., Ltd., Obihiro, Hokkaido 080–0831, Japan
  • ITOH Megumi
    Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Hokkaido 080–8555, Japan
  • NISHIHARA Kahori
    Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Hokkaido 080–8555, Japan
  • AOKI Takahiro
    Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Hokkaido 080–8555, Japan
  • OHTANI Masayuki
    Nippon Beet Sugar Manufacturing Co., Ltd., Obihiro, Hokkaido 080–0831, Japan
  • SHIBANO Kenichi
    Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Hokkaido 080–8555, Japan
  • KAYANO Mitsunori
    Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Hokkaido 080–8555, Japan
  • YAMADA Kazutaka
    Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Hokkaido 080–8555, Japan

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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.

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