A ToF-based system for recording human sagittal back shape.

Background: The sagittal back shape (SBS) of the human body, which should be highly consistent with the spinal morphology along the internal spine line, also presents an s-shaped curve.

Objective: We propose a novel time-of-flight (ToF) based system to record the s-shaped SBS of the human body, which was simple, inexpensive, and non-invasive.

Results: The system was composed of a bottom plate, an upright post, a vertical rod, dozens of horizontal measuring rods, and a ToF sensor.