Exploring reliable photogrammetry techniques for 3D modeling in anatomical research and education
Nicolas Van Vlasselaer1, Benyameen Keelson2,3, Aldo Scafoglieri1
1Department of Experimental Anatomy (EXAN), Vrije Universiteit Brussel (VUB), Brussels, Belgium.
Anatomical Sciences Education
|February 6, 2024
Summary
Photogrammetry offers an affordable 3D modeling solution for anatomical education, with Apple's Object Capture proving faster and more user-friendly than conventional methods. This technique provides accurate anatomical visualizations as a cost-effective alternative to CT and MRI.
Area of Science:
- Anatomical Sciences
- Medical Imaging
- Computer Vision
Background:
- Three-dimensional (3D) visualization is essential for anatomical research, diagnostics, surgical planning, and education.
- Traditional imaging modalities like computed tomography (CT) and magnetic resonance imaging (MRI) are costly and require specialized infrastructure.
- There is a need for accessible and affordable 3D modeling techniques in anatomy.
Purpose of the Study:
- To evaluate photogrammetry as a cost-effective and accessible method for 3D anatomical modeling.
- To compare the performance of conventional open-source photogrammetry software (Colmap) with Apple's RealityKit Object Capture.
- To assess the impact of cross-polarization filters on photogrammetric reconstruction quality.
Main Methods:
- Human C3 vertebrae were imaged using a 24 MP camera, with and without a cross-polarization filter.
- Two photogrammetry methods were employed: Colmap (conventional) and RealityKit Object Capture (Apple).
- Reconstruction time, vertex distance, surface area, and volume were measured and compared against CT scans.
Main Results:
- Apple's Object Capture demonstrated superior reconstruction speed and user-friendliness compared to Colmap.
- Both photogrammetry methods yielded comparable vertex distances to reference meshes and volume measurements.
- Colmap produced larger surface areas than CT-based models; cross-polarization filters improved results in difficult lighting and reduced pre-processing.
Conclusions:
- Photogrammetry, particularly Apple's Object Capture, is a reliable and time-efficient tool for 3D anatomical modeling.
- This technique offers an accessible and cost-effective alternative to CT and MRI for anatomical research and education.
- Further validation across diverse anatomical structures is recommended, highlighting photogrammetry's potential to revolutionize anatomical visualization.
