Technical improvement of CPT (Complex Phase Tracing) profilometry in scoliosis

Citation
J. Kozlowski et al., Technical improvement of CPT (Complex Phase Tracing) profilometry in scoliosis, ST HEAL T, 59, 1999, pp. 194-197
Citations number
4
Categorie Soggetti
Current Book Contents
ISSN journal
09269630
Volume
59
Year of publication
1999
Pages
194 - 197
Database
ISI
SICI code
0926-9630(1999)59:<194:TIOC(P>2.0.ZU;2-I
Abstract
The prototype of a portable instrument for shape measurement and analysis o f the human back has been developed. The new principle applied for fringe p attern analysis is based on the registration of two mutually out-of-phase p atterns, use of the Fourier transform with corrected intrinsic border-error s and on fringe pattern demodulation based on Complex Phase Tracing method. The software includes correction of distortion of the observation lens, da ta calibration, three-dimensional Z-axis rotation of the patient normalizin g his position, calculus of the curvature map (second derivative) enabling precise indication of the PSIS points, color-map and contour representation of the calculated 3D form as well as calculus and presentation of the natu ral image of the patient.