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Proceedings Paper

Posture and re-positioning considerations for a complete torso topographic imaging system for assessing scoliosis
Author(s): Peter O. Ajemba; Nelson G. Durdle; Doug L. Hill; V. James Raso
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Paper Abstract

The influence of posture and re-positioning (sway and breathing) on the accuracy of a torso imaging system for assessing scoliosis was evaluated. The system comprised of a rotating positioning platform and one or two laser digitizers. It required four partial-scans taken at 90o intervals over 10 seconds to generate two complete torso scans. Its accuracy was previously determined to be 1.1±0.9mm. Ten evenly spaced cross-sections obtained from forty scans of five volunteers in four postures (free-standing, holding side supports, holding front supports and with their hands on their shoulders) were used to assess the variability due to posture. Twenty cross-sections from twenty scans of two volunteers holding side supports were used to assess the variability due to positioning. The variability due to posture was less than 4mm at each cross-section for all volunteers. Variability due to sway ranged from 0-3.5mm while that due to breathing ranged from 0-3mm for both volunteers. Holding side supports was the best posture. Taking the four shots within 10 seconds was optimal. As major torso features that are indicative of scoliosis are larger than 4mm in size, the system could be used in obtaining complete torso images used in assessing and managing scoliosis.

Paper Details

Date Published: 27 January 2006
PDF: 8 pages
Proc. SPIE 6056, Three-Dimensional Image Capture and Applications VII, 60560O (27 January 2006); doi: 10.1117/12.643183
Show Author Affiliations
Peter O. Ajemba, Univ. of Alberta (Canada)
Nelson G. Durdle, Univ. of Alberta (Canada)
Doug L. Hill, Glenrose Rehabilitation Hospital (Canada)
V. James Raso, Glenrose Rehabilitation Hospital (Canada)


Published in SPIE Proceedings Vol. 6056:
Three-Dimensional Image Capture and Applications VII
Brian D. Corner; Peng Li; Matthew Tocheri, Editor(s)

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