Validation of biplane fluoroscopy system tracking using bone phantoms

Using our lab’s biplane fluoroscopy system, we collected data on eight bone phantoms to assess the accuracy of our custom bead-based and model-based tracking algorithms. Custom rigs were constructed to apply uniaxial rotation and translation to these bone phantoms. External potentiometer measurements provided a “gold standard” for the tracking algorithms. The bead tracking root-mean-squared errors are consistent with the results from our previous work (sub-mm and sub-deg accuracy). The rotational bead tracking for the remaining bone phantoms in addition to the model-based bone tracking is ongoing.