Pagine 339-345, Lingua: Inglese, TedescoMischkowski, Robert A./Bongartz, J./Giel, D./Frey, S./Thelen, A./Hering, P.The holographic facial profile scan is a new technique for creation of high-resolution, three-dimensional, realistic facial computer models which can be used for surgical planning and documentation in maxillofacial surgery. First, a holographic image of the patient is recorded using a pulsed laser system. In a second step, called holographic tomography, the real image of the patient's hologram is reconstructed by means of a continuous-wave laser. By moving a screen through the real three-dimensional image, it is sliced into a series of two-dimensional projections which are captured with a digital camera. The slices containing the specific twodimensional information are superimposed to a three-dimensional surface model using special software. The extremely short exposure time of 35 nanoseconds for taking a holographic image is separated from the time-consuming rendering process of the surface model; thus, the obtained models are not affected by themovements of the patient.
Parole chiave: holography, laser, facial profile analysis, maxillofacial surgery, surgical planning, surgical simulation, surgical models
