Fig. 2
From: Three-dimensional alignment changes of the shoulder girdle between the supine and standing positions
The local 3-dimensional coordinate systems of the thorax, clavicle, and scapula. a The thorax and clavicular coordinate systems are defined from the specific bony landmarks on CT scans, and the angular rotation of the clavicle relative to the thorax is calculated. IJ, sternal notch; PX, xiphoid process; SC, sternoclavicular joint; AC, acromioclavicular joint. b The scapular coordinate systems are defined from the specific bony landmarks of the scapula, and the angular rotation of the scapula relative to the thorax is calculated. C7, 7th cervical vertebra; T8, 8th thoracic vertebra; TS, root of the scapular spine; AI, inferior angle of the scapula; AA, posterolateral edge of the acromion