Quantitative computed tomographic evaluation of bone mineral density inbeagle dogs: comparison with dual-energy x-ray absorptiometry as a goldstandard

The Journal of Veterinary Medical Science

HyunJu OH¹  MinJung KIM¹  ByeongChun LEE¹  Hakyoung YOON²  Hyeeun LEE²  Danbee KWON²  Byeol KIM²  HyunHee HAN²  Kidong EOM²  Jaehwan KIM² 

[1] Department of Theriogenology and Biotechnology, Collegeof Veterinary Medicine, Seoul National University, Seoul 08826, SouthKorea;Department of Veterinary Medical Imaging, College ofVeterinary Medicine, Konkuk University, 120, Neungdong-ro, Gwangjin-gu, Seoul 05029,South Korea

关键词: bone mineral density (BMD);    dog;    dual-energy X-ray absorptiometry (DXA);    quantitative computed tomography (QCT);   

DOI  :  10.1292/jvms.17-0428

学科分类：兽医学

来源: Japanese Society of Veterinary Science

【 摘 要 】

This study aimed to demonstrate the higher accuracy and reproducibility of quantitativecomputed tomography (QCT) compared with dual-energy X-ray absorptiometry (DXA) as a goldstandard for measuring canine bone mineral density (BMD). Seven middle-aged beagle dogsunderwent lumbar vertebral and bilateral femoral DXA and QCT scans. BMD(mg/cm2) was measured at the vertebral body from L2 to L6, femoral neck, andproximal and distal femoral diaphyses. The BMD values were measured 3 times and compared.The BMD value on QCT was higher than that on DXA for femoral BMD but not for vertebralBMD. The correlation was strong for the lumbar vertebrae (r=0.66) and was strongest for L3(r=0.85). No correlation was found for the femoral neck (P=0.35), andonly moderate correlations were found for the proximal and distal femoral diaphyses(r=0.43 and r=0.40, respectively). The limits of agreement were narrower for vertebral BMDthan for femoral BMD, and L3 had the narrowest limits of agreement. The intraclasscorrelation (ICC) was higher for DXA than for QCT at all lumbar and femoral sitesmeasured, but the ICC of QCT was higher than 0.7. In conclusion, L3 can be used to monitorchanges in BMD, and relative values and sequential monitoring of femoral BMD can also beuseful because of the high reproducibility of QCT measurements. QCT would be a usefultechnique for evaluation of BMD in veterinary practice.

【 授权许可】

Unknown