Abstract (100 words or less): |  | Radiation therapy planning for cancer patients requires measurement of their body surface in the area of treatment to prescribe the right dose and angle of radiation. We propose a non-contact, quick, inexpensive method to reconstruct the surface. A colour mask with round dots and a light source are used to create structured-light images. The distortions of the light pattern are photographed by an offset camera and analyzed by the software package, which converts them into a 3-dimensional surface. We use an inverse polynomial to model the intensity of a light spot, which results in a least squares non-convex optimization problem. |