Bilateral Dynamic CT Uses Contralateral Wrist to Diagnose Scapholunate Injury

Diagnosing scapholunate interosseous ligament injuries remains a significant clinical challenge, as standard radiographs often fail to detect the dynamic instability that precedes carpal collapse [1, 2]. While magnetic resonance arthrography is frequently utilized for its high sensitivity to soft tissue tears, it cannot always characterize the functional impact of a lesion during active wrist movement [3]. Recent advancements in four-dimensional computed tomography have introduced the ability to visualize carpal kinematics in real time, offering a more detailed assessment of joint proximities during flexion and deviation [4, 5]. However, the lack of standardized protocols and the inherent variability in individual wrist anatomy have limited the widespread adoption of dynamic imaging in routine clinical practice [2, 6]. A recent study evaluates whether utilizing the contralateral wrist as an internal control can overcome these diagnostic hurdles and provide a more reliable baseline for identifying ligamentous incompetence.