Imaging Sci Dent. 2019 Mar;49(1):35-43. doi: 10.5624/isd.2019.49.1.35. Epub 2019 Mar 25.
Abstract
Purpose:
The
goal of this study was to assess the accuracy and reliability of a
low-cost portable scanner (Scanify) for imaging facial casts compared to
a previously validated portable digital stereophotogrammetry device
(Vectra H1). This in vitro study was performed using 2 facial
casts obtained by recording impressions of the authors, at King's
College London Academic Centre of Reconstructive Science.
Materials and Methods:
The
casts were marked with anthropometric landmarks, then digitised using
Scanify and Vectra H1. Computed tomography (CT) scans of the same casts
were performed to verify the validation of Vectra H1. The 3-dimensional
(3D) images acquired with each device were compared using linear
measurements and 3D surface analysis software.
Results:
Overall,
91% of the linear Scanify measurements were within 1 mm of the
corresponding reference values. The mean overall surface difference
between the Scanify and Vectra images was <0 .3="" depth="" detected="" differences="" error.="" greater="" images="" in="" measurements.="" merging="" mm.="" multiple="" p="" produced="" registration="" scanify="" significant="" significantly="" were="">
Conclusion:
Scanify
is a very low-cost device that could have clinical applications for
facial imaging if imaging errors could be corrected by a future software
update or hardware revision.
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