A transmitter mounted on a tripod sends an electromagnetic signal that is picked up by the Tracer Pen and by a sensor that is strapped to the patient’s limb. As the clinician moves the pen over the surface of the limb, a control unit determines the location of the Tracer Pen in space and conveys this information to the software.
Structure Sensor is the first 3D sensor for mobile devices. It uses infrared structured light to capture an object which is then generated by the CAD software as a 3D image onscreen. The three-dimensional shape of the limb appears on a computer screen almost immediately after it is captured.
The T-Ring captures shapes in less than a second with its four synchronized digital imagers and four projectors. The T-Ring projects lines onto the patient’s limb; the imagers “see” the lines and capture the three-dimensional shape. Accurate to +/-1.0 mm.
Most facilities use a decades old technique for capturing the shape of the residual limb called plaster casting. They take plaster-of-paris bandage and wrap it around your leg. When the plaster hardens they are done. A couple of problems with this method, both the tension of wrapping the plaster and putting your hands on the wet plaster distorts the shape and size of the residual limb producing a model that is neither the right shape nor size. This means an uncomfortable fitting prosthesis.