Figure 2

Representations of the photogrammetric model. A) Representation of the photogrammetric model for maximal inspiration and expiration. B) Photogrammetric model of three-dimensional extrapolation from two-dimensional images. In both images, the thoracoabdominal section shows the Upper Thorax (UT), Upper Abdomen (UA), Lower Thorax (LT) and Lower Abdomen (LA). The sets UT-LT and UA-LA form the Total Thorax Area (TT) and Total Abdominal Area (TA), respectively.