Stereophotogrammetry of facial soft tissue.

Stereophotogrammetry was employed to measure the 3-dimensional location of points on the surface of the face in a chosen system of coordinates. A 3-dimensional model (image) was computer-generated on the basis of these data. By using specifically determined points the face was postoperatively superimposed upon the preoperative model. Standardized models using the same coordinate system served to objectify surgically induced changes in different graphic representations (sectional planes, contour lines, differences in contour lines, perspective models, differential vector imaging).