Use of multiplanar reconstruction computed tomography in assessing wrist parameters and distal radioulnar joint morphology in a Chinese cohort

Background There is a notable lack of data concerning the morphology of the distal radioulnar joint (DRUJ) in the Chinese population. This study aims to evaluate the normal parameters of the wrist and DRUJ using multiplanar reconstruction (MPR) computed tomography (CT) images in a cohort of Chinese subjects. Methods A total of 39 subjects with 42 CT wrist scans, collected between July 2018 and December 2021, were retrospectively selected and processed into MPR images using OsiriX MD software. The assessed parameters included radial height, radial inclination, palmar tilt, ulnar variance, DRUJ angle and sigmoid notch morphology (based on Tolat's cadaveric study). Results The wrist parameter results were consistent with those of previous studies. The coronal morphology of the DRUJ was categorized as C-type (50%), Flat-shape type (26%), Ski-slope type (14%), and S-type (10%). The C-type sigmoid notch was the most prevalent morphology, representing 50%. Conclusion MPR CT shows strong reliability in assessing wrist and DRUJ parameters. These measurements are clinically relevant for the evaluation and treatment of wrist pathologies and will contribute to future clinical research.