Measurement And Shape Analysis Including Vertebral Rotation Of Scoliotic Spines From Single Plane Radiographs

B. Drerup; E. Hierholzer

doi:10.1117/12.956301

7 July 1986 Measurement And Shape Analysis Including Vertebral Rotation Of Scoliotic Spines From Single Plane Radiographs

B. Drerup, E. Hierholzer

Author Affiliations +

Proceedings Volume 0602, Biostereometrics '85; (1986) https://doi.org/10.1117/12.956301
Event: 1985 International Technical Symposium/Europe, 1985, Cannes, France

Abstract

Radiological assessment and follow-up control of scoliosis, i.e. of a lateral and rotational deviation of the spine, is performed mainly by single plane radiographs. Additional information may be gained from these radiographs by introducing a parametrized vertebral model. By analyzing the radiographic contours according to this model, axial rotation can be determined for any position and orientation of the vertebra. In addition to rotation several other data are determined for each vertebra, such as the tilting angle and the two-dimensional coordinates of the centre. By handling the data as a function of the vertebral location in spine, characteristic curves are generated. In order to find simple shape parameters for these characteristics, a smooth curve has to be fitted to the data points by a least squares approximation. This problem may be solved by a Fourier decomposition of the spinal curves. It appears, that the Fourier coefficients (amplitudes and phases) and some derived shape parameters lend themselves to a medical interpretation, which is consistent with the existing classification of the scoliotic spine.

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B. Drerup and E. Hierholzer "Measurement And Shape Analysis Including Vertebral Rotation Of Scoliotic Spines From Single Plane Radiographs", Proc. SPIE 0602, Biostereometrics '85, (7 July 1986); https://doi.org/10.1117/12.956301

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