The initial and crucial step in total body imaging involves the optical imaging unit. Illumination is provided by 10 high-brightness LEDs, delivering over 150,000 lumens for uniformly distributed lighting.
These are arranged in a concentric ring design encircling the turret of the liquid lens. The liquid lens, employing gravity-induced coma correction, is based on a 75mm lens and utilizes a CMOS camera for imaging purposes. With a focal length of 70mm, the CMOS camera has 8 MP resolution, a 1-inch sensor, and a high imaging rate of 90 frames per second. The working distance of this setup is approximately 400mm, enabling highly accurate and rapid focusing within milliseconds. The imaging unit is run by integrated software drivers for seamless acquisition and control.
The design effectively addresses the iTobos requirements by facilitating swift image transfer while preserving image resolution for machine learning analytics. The illumination LEDs are cross-polarized and supplemented with an additional polarization filter. Cross-polarized illumination in dermatology effectively eliminates specular and glare reflections while enabling subsurface reflection capture. Consequently, the system ensures medical-grade imaging of lesions, nevi, and suspected melanoma structures. The imaging modules are mounted to robotic arms for total body imaging procedures.
The design of the module is independent of the mechanical implementation of the scanning systems. As such, with minor mechanical modifications, it can be adapted for various arrangements. By integrating a time-of-flight sensor, 3-D skin imaging can be achieved. The imaging unit itself can be incorporated into various applications, such as a telemedicine platform for remote diagnostics, wearable technology for skin monitoring, and adapted to various medical robotic arms.