1. A method for creating a quantitative, three-dimensional representation of a surface of a subject, the method comprising: gathering surface data of the subject using an inverse synthetic aperture radar for directing a source signal toward the subject and maintaining the source signal on the subject while the subject is rotated through a range of motion; collecting a returned signal emitted from the subject; and transforming the returned signal into a quantitative, three-dimensional representation of the surface data of the subject.