First scanner prototype: the vision system

Initially, the system was engineered so that the first step is to map the patient in 3D from a collection of images acquired by the two cameras of the first group (Lucid Helios2+ and Lucid Triton).

This allows to perform an initial 3D reconstruction of the patient.

Once accurately positioned, every dermoscopic camera captures an image stack exploiting the fast response of the liquid lens, with several images acquired at a slightly different focus distance, ensuring a thorough documentation of the lesion. This stack is stored and later one combined into a sharp dermoscopic image in which all pixels are in focus.

With the completion of the image capture at one location, the gantry transitions to the next coordinate for that position of the bed, methodically continuing the process to cover all the lesions for that position of the bed. And once all images have been acquired, the bed moves to the next position and the acquisition process is started again, until the full patient has been completely scanned.

Figure: Basic arch

Dermoscopic camera in testing phase, with provisional support and lens. From 1 to 4: Camera, objective, liquid lens and lighting ring.