TY - JOUR
T1 - Reliability, validity, and precision of an active stereophotogrammetry system for three-dimensional evaluation of the human torso
AU - Paul, Scott M.
AU - Chamberlin, Andrew P.
AU - Hatt, Charles
AU - Nayak, Amritha V.
AU - Danoff, Jerome V.
PY - 2009/12
Y1 - 2009/12
N2 - To determine the reliability, stability, validity and precision of a stereophotogrammetry (SP) system for use in quantifying the complex three-dimensional structure of the human torso, we performed assessments of the system using images of geometric solids and a human-form mannequin. Analysis of geometric solids revealed excellent intra- and interrater reliability of the system for linear, surface area and volume measurements (r > 0.99, P < 0.001). Overall, no significant difference was found between SP and manual measurements (F = 4.23, P > 0.06). The system exhibited excellent stability in images of the mannequin over time (r > 0.99). The limit of precision (error > 5%) of the system to detect objects on the surface of the mannequin was estimated at an object size of 23.5 cm2 for surface area and 32 mL for volume. These results demonstrate the capability of SP of the torso to be used as a reliable, stable and valid measure of torso morphology to be applied as a clinical outcome tool in studies of bony and soft tissue pathologies such as scoliosis, rib deformities, obesity or edema.
AB - To determine the reliability, stability, validity and precision of a stereophotogrammetry (SP) system for use in quantifying the complex three-dimensional structure of the human torso, we performed assessments of the system using images of geometric solids and a human-form mannequin. Analysis of geometric solids revealed excellent intra- and interrater reliability of the system for linear, surface area and volume measurements (r > 0.99, P < 0.001). Overall, no significant difference was found between SP and manual measurements (F = 4.23, P > 0.06). The system exhibited excellent stability in images of the mannequin over time (r > 0.99). The limit of precision (error > 5%) of the system to detect objects on the surface of the mannequin was estimated at an object size of 23.5 cm2 for surface area and 32 mL for volume. These results demonstrate the capability of SP of the torso to be used as a reliable, stable and valid measure of torso morphology to be applied as a clinical outcome tool in studies of bony and soft tissue pathologies such as scoliosis, rib deformities, obesity or edema.
KW - Anthropometry
KW - Scoliosis
KW - Stereophotogrammetry
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U2 - 10.1016/j.medengphy.2009.08.011
DO - 10.1016/j.medengphy.2009.08.011
M3 - Article
C2 - 19819750
AN - SCOPUS:70449535521
SN - 1350-4533
VL - 31
SP - 1337
EP - 1342
JO - Medical Engineering and Physics
JF - Medical Engineering and Physics
IS - 10
ER -