Hamamoto Jason T, Leroux Timothy, Chahla Jorge, Bhatia Sanjeev, Higgins John D, Romeo Anthony A, Yanke Adam B, Verma Nikhil N
Department of Orthopaedic Surgery, Division of Sports Medicine, Midwest Orthopaedics at Rush, Chicago, Illinois, U.S.A.
Steadman Philippon Research Institute, Vail, Colorado, U.S.A.
Arthrosc Tech. 2016 Aug 22;5(4):e947-e951. doi: 10.1016/j.eats.2016.04.027. eCollection 2016 Aug.
The preoperative assessment of anterior glenoid bone loss is a critical step in surgical planning for patients with recurrent anterior glenohumeral instability. The structural integrity of the glenoid has been identified as one of the most important factors influencing the success of operative repair. The currently accepted gold standard for glenoid structural assessment among most orthopaedic surgeons is the use of 3-dimensional reconstructed computed tomography images with the humeral head digitally subtracted, yielding an en face sagittal oblique view of the glenoid. This view allows for evaluation of glenoid morphology and quantitative assessment of glenoid bone loss. In this article, we describe the practical application of ImageJ software (National Institutes of Health, Bethesda, MD) to quantify the amount of glenoid bone loss reported as a percentage of either total surface area or diameter. The following equations are used in this technical note for the diameter-based method and surface area method, respectively: Percent bone loss = (Defect width/Diameter of inferior glenoid circle) × 100% and Percent bone loss = (Defect surface area/Surface area of inferior glenoid circle) × 100%.
对于复发性肩关节前脱位患者，术前评估肩胛盂前方骨质缺损是手术规划中的关键步骤。肩胛盂的结构完整性已被确定为影响手术修复成功的最重要因素之一。目前，大多数骨科医生公认的肩胛盂结构评估金标准是使用三维重建计算机断层扫描图像，并对肱骨头进行数字减影，从而获得肩胛盂的矢状斜位正面观。该视图有助于评估肩胛盂形态并对肩胛盂骨质缺损进行定量评估。在本文中，我们描述了ImageJ软件（美国国立卫生研究院，马里兰州贝塞斯达）的实际应用，以量化肩胛盂骨质缺损的量，以占总表面积或直径的百分比表示。本技术说明中分别使用以下公式进行基于直径的方法和表面积方法的计算：骨质缺损百分比 =（缺损宽度/肩胛盂下圆直径）× 100%，骨质缺损百分比 =（缺损表面积/肩胛盂下圆表面积）× 100%。
