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Table 2 Representation of markers in individual recordings

From: Combined and hybrid marker models for radiostereometry assessment of polyethylene liner motion in dual mobility hip prosthesis: a proof-of-concept study

   Phantom Patient
Recording   1 2 3 4 5 1 2 3 4
Conventional markers All recordings 4 4 4 4 4 2 2 2 2
Additional markers 2 3 4 3 1 4 2 5 4
Combined marker configuration model Number of markers in the model 11 11 11 11 11 9 9 9 9
Left 10 8 10 11 7 6 7 7 6
Right 9 8 9 3 9 6 6 7 7
  1. The phantom frames have four common conventional markers and the patient frames have two common conventional markers. All frames have additional markers that cannot be used in the standard analysis as they do not represent the same markers between frames. With the combined marker configuration model, eleven markers were utilised in the phantom and nine in the patient; all projections of these markers were available for analysis. Conventional markers Markers clearly visible in both images of the frame, Additional markers Markers that are visible in both images of the frame but cannot be included in a standard analysis as they do not represent the same marker between frames, Combined marker configuration model Markers and marker projections used for fitting the combined marker configuration model