Effects of calibration errors on 3D kinematics quantification with fluoroscopy
- Publication date
- Publisher
- 'CICS.NOVA'
Abstract
Model based 3D fluoroscopy can quantify joint
kinematics with a mm/deg accuracy level. A calibration based
on the acquisition of specific devices is usually applied to size the
system. This study aimed at the characterization of the sensitivity
of the pose estimation accuracy to errors in the calibration
process, in order to evaluate a possible simplification of the
calibration procedure. In-silico simulations were performed to
analyse a data-set obtained adding controlled perturbation in the
calibration process. The estimation of the rotations was scarcely
influenced by calibration errors, while a linear trend was high-
lighted for translations with a sensitivity of 20% correspondent
to approximately a 1 mm error for realistic calibration errors.
This error is compensated when computing relative kinematics
between two joint segments