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Anthropometric optical surface imaging system repeatability, precision, and validation
L A Kohn1, J M Cheverud, G Bhatia
1Program in Occupational Therapy, Washington University School of Medicine, St Louis, MO 63108, USA.
Annals of Plastic Surgery
|April 1, 1995
Summary
This study validates the Cencit Imaging System, a new optical scanner for accurate human body measurements. The system demonstrated high repeatability and precision, with most errors stemming from human landmark marking, not the device itself.
Area of Science:
- Anthropometry
- Biomedical Engineering
- Medical Imaging
Background:
- Accurate human body surface measurements are crucial for various scientific disciplines.
- Existing anthropometric methods may lack precision and repeatability.
- A novel optical surface scanner, the Cencit Imaging System, was developed.
Purpose of the Study:
- To design and analyze the repeatability, precision, and validation of the Cencit Imaging System.
- To estimate the proportion of total variation attributable to different data collection levels.
- To compare the Cencit Imaging System's performance against a validated digitizer.
Main Methods:
- A statistical model was developed to assess measurement variation.
- Twenty-seven facial landmarks were marked on 20 participants (10 men, 10 women).
- Measurements were taken across two sessions, with two scans per session and two digitizations per scan.
Main Results:
- The Cencit Imaging System demonstrated accurate and highly repeatable image acquisition.
- The primary source of error was identified as human variability in landmark marking.
- The system's performance was comparable to a previously validated digitizer.
Conclusions:
- The Cencit Imaging System is a reliable tool for precise anthropometric measurements.
- The system's accuracy is not limited by its optical scanning capabilities.
- The Cencit Imaging System offers significant potential for diverse anthropometric applications.