Abstract:Objective: Using the Three-Dimensional Sampling Perfection with Application optimized Contrast using different flip angle Evolution (3D-SPACE) sequence combined with Compressed Sensing (CS) technology, the anatomical parameters of trapezoid ligament and conoid ligament (the two components of the coracoclavicular ligament) were quantitatively measured in a healthy population, such as the length, the attachment footprint width, and the position of attachment footprint center. Methods: Prospective collection of 64 patients without shoulder trauma who underwent shoulder joint MRI examination, the coronal T1WI 3D CS-SPACE sequence scans were performed on these patients. Two radiologists performed multiplanar reconstruction on these images, measuring the length of the trapezoid and conoid ligaments, the attachment footprint width on the clavicle, and the distance from the attachment footprint center to the outer edge of the clavicle on the oblique coronal image. The attachment footprint width on the coracoid process were measured on the oblique sagittal image. And the distance from the attachment footprint center of these two ligaments to the outer edge of the coracoid process and the size of the coracoid process was measured on the oblique axial image. When the measurement results of two physicians are consistent, take the average for statistical analysis. Grouping by gender, comparing the consistency between each parameter, and conducting correlation analysis between anatomical quantitative data of the coracoclavicular ligament and age and coracoid process size. Results: The length of the trapezoid ligament, the attachment footprint width on the clavicle and coracoid process of the trapezoid ligament, the distance from attachment footprint center of the trapezoid ligament to the outer edge of the clavicle and coracoid process, and the distance from attachment footprint center of the conoid ligament to the outer edge of the clavicle and coracoid process all showed statistical differences between males and females (P<0.05). There is no correlation between age and various anatomical parameters (P>0.05). Except for the length of the conoid ligament, the anatomical quantitative parameters of the trapezoid ligament and conoid ligament have varying degrees of correlation with the size of the coracoid process (P>0.05). Conclusion: The 3D CS-SPACE sequence can clearly display the anatomical structures of the trapezoid ligament and conoid ligament, and obtain quantitative anatomical parameters of them, providing a basis for individualized surgical treatment of patients with acromioclavicular joint injuries and reducing the occurrence of complications.