3-D measurement of posture and back shape using a low cost, portable system--a reliability study.

: The reliability and accuracy in the measurement of landmark points using a 3-D digitizer on a static back phantom are reported. The results show the systems clinical reliability as a low cost, portable and flexible method for recording back posture. Consistent results are demonstrated for a single measurer and good agreement was found between two measurers. Few intrinsic errors were found in the devices performance.