Samenvatting

Introduction: There is currently no standardized method for measuring wrist kinematics in a 4D CT scanner. Various methods of wrist motion during a 4D CT scan have been reported in the literature, including asking the patient to move the wrist or using a motion guidance device. No research was done into the reliability of these motion guidance devices. Purpose: The purpose of this study was to investigate the reliability of motion guidance during flexion-extension and radial-ulnar deviation to eventually implement the device in the research setting. Methodology: Measurements of the movements generated by the device were taken in two condition; unloaded (without anatomical specimen) and loaded (with anatomical specimen) with the OptiTrack equipment. These conditions were tested during flexion-extension and radial-ulnar deviation, with cluster makers placed on the rotation axes of the device. Results: During both flexion-extension and radial-ulnar deviation, unwanted movements occurred. Furthermore, a low degree of reliability was found between the two conditions during both flexion-extension and radial-ulnar deviation. Discussion: Future research should focus on increasing the reliability of the device by making adjustments to optimize the device. In addition, the effect of the unreliability of the movements generated by the device on the angles between the carpal bones on CT images should be investigated. Conclusion: The motion guidance device does not provide reliable data between the two conditions. Without adjustments to improve the reliability of the motion guidance device, its use in future research on wrist kinematics is not recommended.