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[Experimental studies of the visualization of the vertebral body spongiosa by high-resolution computed tomography]
M G Henschel1, J Freyschmidt, B R Holland
1Radiologische Klinik des ZKH St-Jürgen-Strasse, Bremen.
Aim:
To show the accuracy and the lower limit of visualisation of cancellous bone in high-resolution computed tomography (HR-CT).
Methods:
18 native human lumbar vertebrae were placed in a water phantom and examined by HR-CT. The scans were compared with contact radiographs of correlating thin bone sections by morphologic criteria.
Results And Conclusion:
The measured lower limit of visualisation of cancellous bone structures is clearly worse than expected from the measurements of spatial resolution with standard phantoms used for HR-CT (0.6 versus 0.4 mm). True and exact imaging of normal cancellous bone cannot be achieved even by modern HR-CT. Noise creates structures mimicking cancellous bone.