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Comparative investigation of bone mineral density using CT and DEXA in a canine femoral model
Author(s) -
Lucas Karin,
Behrens BerndArno,
Nolte Ingo,
GalindoZamora Vladimir,
Betancur Stefanie,
Almohallami Amer,
Bouguecha Anas,
Mostafa Ayman,
Lerch Matthias,
StukenborgColsman Christina,
Wefstaedt Patrick
Publication year - 2017
Publication title -
journal of orthopaedic research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.041
H-Index - 155
eISSN - 1554-527X
pISSN - 0736-0266
DOI - 10.1002/jor.23574
Subject(s) - hounsfield scale , bone mineral , medicine , bone density , nuclear medicine , computed tomography , correlation , dual energy , dual energy x ray absorptiometry , quantitative computed tomography , radiology , osteoporosis , mathematics , geometry
Bone density measurements using computed tomography (CT) instead of dual‐energy X‐ray absorptiometry (DEXA) are currently of great interest in human and veterinary medical research as it would be beneficial to use CT scans obtained for other indications also for determining bone density. For Hounsfield units (HU) measured with CT in specific regions of interests (ROIs) in one or several slice/s a correlation with bone mineral density (BMD) measured by DEXA in humans and dogs of between 0.44 and 0.77 is reported in the literature. In the present study, instead certain volumes of interest (VOIs) obtained by CT scan and the corresponding HU to the respective VOIs were compared with the bone mineral density of the corresponding areas measured by DEXA. The aim of the study was to investigate whether this procedure gives more accurate information about bone density of the bones as three‐dimensional objects of the respective patient. Correlation between measured HU in the respective VOI and BMD measured with DEXA in the corresponding ROI showed a very good correlation of 0.93. Linear regression with R 2 = 0.85 ( p = 0.0262) was calculated. Except for VOI5, similar distribution of values and significant differences ( p < 0.0001–0.0087) between ROIs/VOIs were detected. Determining HU for assessing bone mineral density in a certain volume provides more accurate results than those previously reported from two‐dimensional (2D) CT measurements. © 2017 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 35:2667–2672, 2017.