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Dissection, MicroCT Scanning and Morphometric Analyses of the Baculum

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Three-dimensional surface scanning methods in osteology: A topographical and geometric morphometric comparison.

Lukas Waltenberger^1,2, Katharina Rebay-Salisbury¹, Philipp Mitteroecker²

¹Austrian Archaeological Institute, Austrian Academy of Sciences, Vienna, Austria.

American Journal of Physical Anthropology

|January 7, 2021

Summary

Three-dimensional (3D) models from computed tomography (CT) scans, structured light scanners, and photogrammetry can be combined for analysis. Photogrammetry is a cost-effective and accurate method for generating 3D surface models.

Keywords:

3D structured light surface scanner CT scanning MicroScribe digitizer human pelvis photogrammetry

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Area of Science:

Biomedical Engineering
Anthropology
Computer Science

Background:

Three-dimensional (3D) data from diverse scanning techniques are increasingly integrated in joint analyses.
Significant variations exist in scanning technologies and reconstruction software, posing challenges for data integration.

Purpose of the Study:

To evaluate and compare the quality and accuracy of 3D surface models and landmark data.
To assess data from clinical computed tomography (CT) scanning, 3D structured light scanning, photogrammetry, and MicroScribe digitizer.

Main Methods:

Tested 13 photogrammetric software packages for surface model generation.
Compared surface models of four articulated human pelves using topographical analysis.
Measured 219 landmarks and semilandmarks on dry bones and 3D models using a MicroScribe digitizer.

Main Results:

Only one photogrammetric software produced usable complete pelvic surface models.
CT scanning, 3D structured light scanning, and photogrammetry yielded comparable surface models with 100-200 μm deviations.
MicroScribe digitizer data acquisition was the most error-prone method for landmark analysis.

Conclusions:

Demonstrated the feasibility of combining 3D models from different methods in a single analysis.
Photogrammetry is a viable, economical, and accurate option for generating 3D surface models.
Significant variability in photogrammetry software quality necessitates careful selection.