A radio frequency carrier phase measurement technique to enable noninvasive spinal/pelvic alignment monitoring for individuals seated in personal wheeled mobility devices

Spinal deformity can lead to loss of stability and upper body function, including a decrease in respiratory capacity. Effective non-invasive procedures for measuring and recording spinal/pelvic alignment of a seated person are unavailable. The focus of this paper is to describe a new method using a radio frequency carrier phase measurement technique.