Computed tomography-osteoabsorptiometry for assessing the density distribution of subchondral bone as a measure of long-term mechanical adaptation in individual joints |
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Authors: | Magdalena Müller-Gerbl Reinhard Putz Norbert Hodapp Erik Schulte Berthold Wimmer |
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Affiliation: | (1) Anatomische Anstalt, Pettenkoferstrasse 11, D-8000 München 2, Germany;(2) Abteilung Strahlentherapie, Radiologisches Institut, Universität Freiburg, Freiburg, Germany;(3) Abteilung Röntgendiagnostik, Radiologisches Institut, Universität Freiburg, Freiburg, Germany |
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Abstract: | To estimate subchondral mineralisation patterns which represent the long-term loading history of individual joints, a method has been developed employing computed tomography (CT) which permits repeated examination of living joints. The method was tested on 5 knee, 3 sacroiliac, 3 ankle and 5 shoulder joints and then investigated with X-ray densitometry. A CT absorptiometric presentation and maps of the area distribution of the subchondral bone density areas were derived using an image analyser. Comparison of the results from both X-ray densitometry and CT-absorptiometry revealed almost identical pictures of distribution of the subchondral bone density. The method may be used to examine subchondral mineralisation as a measure of the mechanical adaptability of joints in the living subject. |
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Keywords: | Computed tomography-osteoabsorptiometry Subchondral bone density Biomechanics Functional adaptation X-ray densitometry |
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