Abstract
Purpose
This article describes the assembly of a cost-efficient system to enable contact-free volumetric measurement of facial volumes.
Methods
The system was built from low-cost standard equipment, including Lego bricks, standard CCD camera, laser module, USB board, and stepper motor. The total cost was less than 200 €. At different time intervals, depth data were captured with a sweeping laser line to subsequently determine volumetric models of the object under investigation.
Results
The obtained volumetric data were imported in the open-source software ParaView (Kitware Inc., New York, NY, USA) as standard comma-separated files. The absolute errors of the obtained depth values increased from 0.5 to 3.52 mm between 30 and 90 cm of defined object distance, respectively. The relative errors increased from 0.3 to 0.76 %, respectively.
Conclusions
This study proves that applicable volume scanners can be built using low-cost components.
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Acknowledgments
The scanner was developed by Tobias Muench during his studies for a doctorate according to an idea of Dan Brüllmann and Ralf Schulze. All three authors agree that they contributed equally to this study.
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Dan Brüllmann, Tobias Muench, and Ralf Schulze declare that they have no conflict of interest.
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All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1964 and later versions. Informed consent was obtained from all patients for being included in the study.
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Brüllmann, D., Muench, T. & Schulze, R. Construction of a low-cost surface scanner for medical studies: a feasibility study. Oral Radiol 32, 211–216 (2016). https://doi.org/10.1007/s11282-016-0236-x
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DOI: https://doi.org/10.1007/s11282-016-0236-x