A novel approach for temporally aligning bilateral carpal bone poses obtained from 4dct imaging

Damage to the scapholunate interosseus ligament (SLIL) is one of the most disabling upper extremity injuries. Current diagnostic approaches for SLIL are invasive or lack the specificity to assess injury location. A better understanding of carpal bone kinematics following the SLIL injury may help to identify a quantitative method for assessing the grade and location of injury. This study established an approach for comparing 3D carpal bone kinematics bilaterally in patients with unilateral SLIL injuries using a high spatial and temporal resolution 4D (3D + time) 4DCT technique [1]. An interpolation method was used to correct the temporal misalignment between the left and right wrist scans. The percentage of rotation of the scaphoid and lunate relative to the capitate were compared during flexion/extension (FE) and radial/ulnar deviation (RU), which were not significantly different between the injured and uninjured sides.