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Evaluating the accuracy of hand models obtained from two 3D scanning techniques
Fang Yu1, Lei Zeng1, Ding Pan1
1Orthopedic Department, Xiangya Hospital, No.87 Xiangya Road, Changsha, 410008, China.
Scientific Reports
|July 19, 2020
Summary
Structured-light (SL) scanning and CT scanning offer efficient 3D hand imaging, providing accurate and reproducible results comparable to direct measurements. These advanced techniques reduce scanning time and are viable alternatives for clinical use.
Area of Science:
- Medical Imaging
- Orthopedics
- Biomechanical Engineering
Background:
- Accurate 3D imaging of the hand is crucial for diagnosis and treatment planning in various medical fields.
- Traditional direct measurement (DM) methods can be time-consuming and prone to variability.
- Evaluating novel indirect 3D imaging techniques like structured-light (SL) scanning and CT scanning is essential for improving hand assessment.
Purpose of the Study:
- To identify an efficient and accurate approach for 3D hand imaging using the Gemini structured-light (SL) scanning system and CT scanning.
- To compare the scanning and reconstruction times, reliability, reproducibility, and accuracy of SL scanning and CT scanning against direct measurement (DM).
Main Methods:
- Acquired 3D hand photographs using the Gemini structured-light (SL) scanning system and CT scanning.
- Compared scanning and reconstruction times between SL scanning and CT scanning.
- Evaluated reliability, reproducibility, and accuracy of SL scanning, CT scanning, and direct measurement (DM), with statistical significance assessed at 99% probability and clinical significance at >0.5 mm.
Main Results:
- The Gemini SL scanning system produced complete, smooth 3D hand images with reduced scanning and reconstruction times compared to CT scanning.
- Both CT scanning and SL scanning demonstrated superior reproducibility (P < 0.01) compared to DM, with no significant difference between the two indirect methods (P = 0.462).
- Mean absolute errors for 3D CT and SL scanning were low (0.29 ± 0.10 mm and 0.30 ± 0.11 mm, respectively), with absolute percentage errors of 4.69 ± 2.33% and 4.88 ± 2.22%.
Conclusions:
- The Gemini structured-light (SL) scanning system provides an efficient method for creating high-quality 3D hand images, significantly reducing processing time.
- Both SL scanning and CT scanning are reliable and reproducible 3D imaging techniques for the hand, suitable for clinical application.
- These indirect 3D imaging techniques can be used interchangeably with direct measurement, offering advantages in efficiency and accuracy for most hand dimensions.
