PRIAPUS — non-contact monitoring of penile dimension changes by photogrammetry

Summary

Clinical evaluations to objectify sexual arousal in men use indicators of penile configuration changes. Most common are measurements of changes in circumference and/or rigidity using loops around the penis. To avoid psychogenic disturbance during the investigation, a method was developed that enable non-contact evaluation of penile changes during visual sexual stimulation. A three-dimensional (3-D) real-time computerized imaging system is used for the acquisition and registration of penile configuration changes. Images from two high-precision cameras are digitized using a geometrical and graylevel registration model. The triangulation technique in the stereoscopic approach is used to extract 3-D information. This method of digitized photogrammetry enables non-touch documentation of penile length, diameter, volume, curvature and direction changes during sexual stimulation. The curvature registration also enables objective documentation in patients complaining of penile curvature during erection.