CT-Like MRI for Assessing Shoulder Bone and Ligament Injuries

Introduction This study investigates the use of "CT-like imaging" derived from a 3D multi-echo gradient-recalled echo (GRE) MRI sequence to assess the morphology of bones and ligaments in the shoulder joint. Methods CT-like images were produced using a 3D multi-echo GRE sequence with optimized imaging parameters, including a 5° flip angle and the combination of two echo acquisitions. A monopolar readout gradient was employed to minimize ligament blurring, and subtraction processing was applied to enhance the visualization of both bone and ligament structures. Results In a clinical case of anterior shoulder dislocation, the CT-like images successfully revealed bone injuries with clarity comparable to that of conventional CT. In addition, this MRI-based technique provided superior visualization of ligament structures. Conclusions This radiation-free imaging approach offers particular advantages for radiosensitive patients. However, further validation in multicenter studies across various age groups is necessary to establish its broader clinical utility.