Figure 1. Thoracic schematic diagram of the thorax, with measurements: the sagittal distance between the posterior aspect of the sternum (A) and the anterior spine (B); the sagittal distance between the posterior sternum (C) in its hypothetical corrected position and the anterior spine (B), minus the distance between the posterior sternum in its actual position and the anterior spine (B); the side-to-side distance (D-E); the sagittal depth of the right and left hemithoraces (F-G and H-J); and the sternal rotation angle (F-C-H).