FIGURE 1.

Anatomical coordinate systems (ACSs) of the thorax (xt, yt, and zt pointing ventral, proximal, and laterally to the right, respectively) and pelvis (xp, yp, and zp pointing ventral, proximal, and laterally to the right, respectively) and the corresponding anatomical landmarks (SN: suprasternal notch; XP: xiphoid process; C7: spinous process of the 7th cervical vertebra; T8: spinous process of the 8th thoracic vertebra; RASIS and LASIS: right and left anterior superior iliac spines, respectively; and RPSIS and LPSIS: right and left posterior superior iliac spines, respectively)