Previously submitted to: JMIR Dermatology (no longer under consideration since Jul 09, 2025)
Date Submitted: Aug 20, 2024
Warning: This is an author submission that is not peer-reviewed or edited. Preprints - unless they show as "accepted" - should not be relied on to guide clinical practice or health-related behavior and should not be reported in news media as established information.
Reliability of a portable non-fixed stereophotogrammetry system for facial imaging
ABSTRACT
Background:
Stereophotogrammetry (3D-SQ) provides a precise alternative for the assessment of facial aesthetic procedures. Nevertheless, its accuracy could be influenced by the operator when a non-fixed device is used.
Objective:
The objective of the present observational study was to evaluate the reliability of a portable non-fixed 3D-SQ device.
Methods:
Three operators took two 3D image captures of three distinct volunteers using a portable non-fixed 3D-SQ device. The acquisition of images was performed at two different time points (F1 and F2) with a 60-minute interval between each capture for each volunteer. No external lights or tripod were utilized, as recommended by the manufacturer. The photographs were processed through specialized software to generate 3D models, and a specific region of the face was analyzed to assess the reliability of the method. Interclass correlation coefficients of the area, perimeter, and volume of the selected region were calculated.
Results:
The results demonstrated a high intra-operator consistency at all three obtained values (volume ICCs=0.829; area ICCs=0.828; perimeter ICCs=0.673). However, low reliability in all values across different operators was found (ICCs<0.5).
Conclusions:
The study concluded that the reliability in facial stereophotogrammetry using a non-fixed device can be influenced by the operator, exhibiting high intra-operator reliability but significant variations between different operators. These variations may be attributed to factors such as operator height, differences in reference points, or equipment stability.
Citation
Request queued. Please wait while the file is being generated. It may take some time.
Copyright
© The authors. All rights reserved. This is a privileged document currently under peer-review/community review (or an accepted/rejected manuscript). Authors have provided JMIR Publications with an exclusive license to publish this preprint on it's website for review and ahead-of-print citation purposes only. While the final peer-reviewed paper may be licensed under a cc-by license on publication, at this stage authors and publisher expressively prohibit redistribution of this draft paper other than for review purposes.