In vivo measurement of bone quality in the horse: Estimates of precision for ultrasound velocity measurement and single photon absorptiometry

1992 ◽  
Vol 30 (1) ◽  
pp. 41-45 ◽  
Author(s):  
S. H. W. Buckingham ◽  
L. B. Jeffcott ◽  
G. A. Anderson ◽  
R. N. McCartney
Keyword(s):  
Bone Quality ◽  
Velocity Measurement ◽  
Single Photon ◽  
Ultrasound Velocity ◽  
Single Photon Absorptiometry ◽  
Photon Absorptiometry ◽  
In Vivo Measurement

Validation of single photon absorptiometry for on-farm measurement of density and mineral content of tail bone in cattle

2016 ◽  
Vol 56 (12) ◽  
pp. 2054 ◽  
Author(s):  
D. B. Coates ◽  
R. M. Dixon ◽  
R. J. Mayer ◽  
R. M. Murray
Keyword(s):  
Specific Gravity ◽  
Bone Mineral ◽  
Single Photon ◽  
Bone Thickness ◽  
Single Photon Absorptiometry ◽  
Photon Absorptiometry ◽  
In Vivo Measurements ◽  
Phosphorus Status ◽  
On Farm

A validation study examined the accuracy of a purpose-built single photon absorptiometry (SPA) instrument for making on-farm in vivo measurements of bone mineral density (BMD) in tail bones of cattle. In vivo measurements were made at the proximal end of the ninth coccygeal vertebra (Cy9) in steers of two age groups (each n = 10) in adequate or low phosphorus status. The tails of the steers were then resected and the BMD of the Cy9 bone was measured in the laboratory with SPA on the resected tails and then with established laboratory procedures on defleshed bone. Specific gravity and ash density were measured on the isolated Cy9 vertebrae and on 5-mm2 dorso-ventral cores of bone cut from each defleshed Cy9. Calculated BMD determined by SPA required a measure of tail bone thickness and this was estimated as a fraction of total tail thickness. Actual tail bone thickness was also measured on the isolated Cy9 vertebrae. The accuracy of measurement of BMD by SPA was evaluated by comparison with the ash density of the bone cores measured in the laboratory. In vivo SPA measurements of BMD were closely correlated with laboratory measurements of core ash density (r = 0.92). Ash density and specific gravity of cores, and all SPA measures of BMD, were affected by phosphorus status of the steers, but the effect of steer age was only significant (P < 0.05) for steers in adequate phosphorus status. The accuracy of SPA to determine BMD of tail bone may be improved by reducing error associated with in vivo estimation of tail bone thickness, and also by adjusting for displacement of soft tissue by bone mineral. In conclusion a purpose-built SPA instrument could be used to make on-farm sequential non-invasive in vivo measurements of the BMD of tailbone in cattle with accuracy acceptable for many animal studies.

scholarly journals DETERMINATION OF BONE MINERAL DENSITY AT DISTAL RADIUS MEASURED BY SINGLE PHOTON ABSORPTIOMETRY : NEW INDEX FOR BONE MINERAL DENSITY

1988 ◽  
Vol 44 (7) ◽  
pp. 745-749
Author(s):  
TATSUSHI TOMOMITSU ◽  
SHINICHI YANAGIMOTO ◽  
GO HITOMI ◽  
AKIHIKO MURAKAMI ◽  
SHINJI SUEMORI ◽  
...  
Keyword(s):  
Bone Mineral Density ◽  
Distal Radius ◽  
Bone Mineral ◽  
Single Photon ◽  
Mineral Density ◽  
Single Photon Absorptiometry ◽  
Photon Absorptiometry

New Diagnostic and Monitoring Method for Osteoporosis

2017 ◽  
pp. 1851-1884
Author(s):  
Sofia Panteliou
Keyword(s):  
Bone Quality ◽  
Structural Integrity ◽  
Assessment Tool ◽  
Bone Diseases ◽  
Damping Factor ◽  
In Vivo Measurement ◽  
Modal Damping ◽  
Invasive Method

Osteoporosis is chronic disease affecting most postmenopausal females and 30% of males with biological, behavioral and financial consequences. A non invasive method to assess bone structural integrity is presented, based on in-vitro or in-vivo measurement of bone dynamic characteristics (Modal Damping Factor) by applying vibration excitation in the range of acoustic frequencies, in the form of an acoustic sweep signal. This method has been applied on metallic structures and composites, including bones, and is supported by analytical and arithmetic tool based on model's theory. Experimental MDF results are compared to results acquired with conventional methods for bone quality assessment and show impressive correlations between damping factor and indices of bone quality in an advantageous manner. Evaluation of these research findings strengthens the potential of the proposed method to consist a valuable assessment tool for diagnosis and monitoring of bone integrity, in metabolic bone diseases, especially osteoporosis.

Fracture strength prediction in rat femoral shaft and neck by single photon absorptiometry of the femoral shaft

1994 ◽  
Vol 25 (1) ◽  
pp. 39-46 ◽  
Author(s):  
Lars Nordsletten ◽  
Trine Sand Kaastad ◽  
Sigmund Skjeldal ◽  
Olav Reikerås ◽  
Knut P. Nordal ◽  
...  
Keyword(s):  
Fracture Strength ◽  
Single Photon ◽  
Femoral Shaft ◽  
Strength Prediction ◽  
Single Photon Absorptiometry ◽  
Photon Absorptiometry
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