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Theoretical study to the sub-project 'Interactive software for 2D and 3D standardization of pelvic radiographs and CT-scans for accurate evaluation of hip joint morphology' under CO-ME project 4

K. Burckhardt
267, 2003
Computer Vision Lab, ETH Zurich

Abstract

The goal of the sub-project is a method to compensate mal-orientation of the pelvis in radiographs. The mal-orientation is supposed to be assessed using its correlation to the image distance between two bony landmarks. In this study it is investigated if this goal is theoretically feasible. Using the principle of error propagation, the clinical standard deviation of the image distance is estimated considering the errors entering the image acquisition. It resulted that the assessment of the pelvic rotation around the longitudinal axis could be possible, with a precision of about +/-2.0°. Concerning the rotation around the transversal axis, however, an error of about +/-8.0° has to be expected making the assessment of the pelvic tilt impracticable. The responsible entering error was found to be the variability of the pelvic anatomy.


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@Techreport{eth_biwi_00311,
  author = {K. Burckhardt},
  title = {Theoretical study to the sub-project 'Interactive software for 2D and 3D standardization of pelvic radiographs and CT-scans for accurate evaluation of hip joint morphology' under CO-ME project 4},
  year = {2003},
  month = {December},
  number = {267},
  institution = {Computer Vision Lab, ETH Zurich},
  keywords = {radiograph, pelvic mal-orientation, bony landmarks, tilt reconstruction,error propagation}
}