Zusammenfassung
Durch die Anwendung eines Spezialscanners mit125I als Strahlenquelle wird der menschliche Radius computertomographisch analysiert. Parameter für Spongiosa und Compacta können an einem metaphysären und diaphysären Meßort separat bestimmt werden.
Mit dieser Technik wurden Änderungen der Knochenmineralisation nach Immobilisation wegen einer Fraktur an der oberen Extremität bei 23 Kindern bestimmt. Eine Immobilisationsperiode von 3–6 Wochen führte zu einer Abnahme der Spongiosadichte bis zu 44% (Mittelwert 16%) im distalen Radius, während keine signifikanten Änderungen an der Compacta der Diaphyse festzustellen waren.
Eine rasche Remineralisation der Spongiosa konnte beobachtet werden, jedoch war diese bei einigen Patienten 6 Monate nach Gipsentfernung noch nicht vollständig.
Summary
Computed tomography of the human radius is performed using a special purpose scanning device which incorporates a radionuclide (125I) as radiation source. Parameters describing the trabecular bone and the compact bone are determined at a distal and a diaphyseal measuring site respectively.
Using this measurement technique changes in bone mineralization in the radius were studied in a group of 23 children following immobilization of an upper limb for fracture healing. An immobilization period of between three to six weeks resulted in a reduction of the relevant parameter value of up to 44% (mean 16%) in the distal part of the radius, whereas no significant change could be seen in the diaphyseal part of the same bone.
Rapid remineralization of trabecular bone is indicated by the increase of the corresponding parameter value at a rate of up to several percent per week. However, in some of the patients studied complete normalization was not attained during the first six months following cast removal.
References
Custer, R.P.: An atlas of the blood and bone marrow (2nd ed.), p. 33. Philadelphia: W.B. Saunders Co. 1974
Elsasser, U.: Quantifizierung der Spongiosadichte an Röhrenknochen mittels Computertomographie. Doctoral Thesis. Zurich: ETH Dissertation No. 5874, 1977
Elsasser, U., Exner, G.U.: Application of computed tomography in bone mineral analysis. Fed. Proc.36, 495 (1977)
Exner, G.U., Prader, A., Elsasser, U., Rüegsegger, P., Anliker, M.: Bone densitometry using computed tomography. Part I: Selective determination of trabecular bone density and other bone mineral parameters. Normal values in children and adults. Br. J. Radiol.52, 14 (1979)
Exner, G.U., Prader, A., Elsasser, U., Anliker, M.: Bone mineral analysis with CT in renal osteodystrophy and Vit. D resistent hypophosphatemic rickets. Ped. Res.11, 1922 (1977)
Exner, G.U., Prader, A., Elsasser, U., Anliker, M.: Bone densitometry using computed tomography (CT). Part II: Increased trabecular bone density in children with chronic renal failure (CRF). Brit. J. Radiol.52, 24 (1979)
Johnston, C.C., Smith, D.M., Nance, W.E., Bevan, J.: Evaluation of radial bone mass by photon absorption technique. In: Clinical aspects of metabolic bone diseases, Frame, B., Parfitt, A.M., Duncan, H. (eds.), p. 28. Amsterdam: Excerpta Medica 1973
Minaire, P., Meunier, P., Edouard, C., Bernard, J., Courpron, P., Bourret, J.: Quantitative histological data on disuse osteoporosis. Calc. Tiss. Res.17, 57 (1974)
Nilsson, B.E.: Post-traumatic osteopenia. Acta Orthop. Scand. (Suppl.)91, 3 (1966)
Nilsson, B.E., Westlin, N.E.: Restoration of bone mass after fractures of the lower limb in children. Acta Orthop. Scand.42, 78 (1971)
Nilsson, B.E., Westlin, N.E.: Bone mass in Colle's fracture. In: Proc. Internat. Conf. on Bone Mineral Measurement, p. 362. No. NIH 75-683, Chicago: EHEW Publ. 1973
Nilsson, B.E., Westlin, N.E.: Bone mineral content in the forearm after fracture of the upper limb. Calc. Tiss. Res.22, 329 (1977)
Rüegsegger, P., Elsasser, U., Anliker, M., Gnehm, H.P., Kind, H.P., Prader, A.: Quantification of bone mineralization using computed tomography. Radiology121, 93 (1976)
Rüegsegger, P., Hangartner, Th., Keller, H.U., Hinderling, T.: Standardization of computed tomography images by means of a material-selective beam hardening correction. J. Comput. Ass. Tomogr.2, 184 (1978)
The International Commission on Radiological Protection: Report of the Task Group on Reference Man, p. 97. ICRP Publ. No. 23. Oxford: Pergamon Press 1975
Vose, G.P., Huxthal, M.: X-ray density changes in the human heel during bed rest. Am. J. Roentgenol.106, 486 (1969)
Westlin, N.E.: Loss of bone mineral after Colle's fracture. Clin. Orthop. Rel. Res.102, 194 (1974)
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This work has been supported in part by the Swiss National Science Foundation
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Elsasser, U., Rüegsegger, P., Anliker, M. et al. Loss and recovery of trabecular bone in the distal radius following fracture — Immobilization of the upper limb in children. Klin Wochenschr 57, 763–767 (1979). https://doi.org/10.1007/BF01478034
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DOI: https://doi.org/10.1007/BF01478034