Feasibility of obtaining quantitative 3-dimensional information using conventional endoscope: a pilot study
Jong Jin Hyun1, Hoon Jai Chun, Bora Keum
1Division of Gastroenterology and Hepatology, Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea.
Clinical Endoscopy
|September 15, 2012
Summary
Conventional gastrointestinal endoscopy can acquire quantitative three-dimensional (3D) information. This study demonstrates the feasibility of using standard endoscopes for 3D measurements, paving the way for enhanced endoscopic imaging.
Area of Science:
- Medical Imaging
- Gastroenterology
- Surgical Technology
Background:
- Three-dimensional (3D) imaging is increasingly adopted in laparoscopic and robotic surgery.
- Its application in gastrointestinal endoscopy remains limited.
- This study explores the potential of conventional gastrointestinal endoscopy for 3D imaging.
Purpose of the Study:
- To evaluate the feasibility of acquiring quantitative 3D information from images obtained by conventional gastrointestinal endoscopy.
- To assess the accuracy of 3D measurements using standard endoscopic equipment.
Main Methods:
- Two conventional endoscopes (GIF-H260) were used with a clay tumor model.
- Image calibration corrected for distortion.
- Epipolar geometry, two-view geometry, and pinhole camera models were employed for 3D parameter measurement.
- Edge detection was used on grayscale images.
Main Results:
- Focal length and camera-object distance were determined.
- Object dimensions (height and width) were calculated using the pinhole camera model.
- Measurements yielded results of 38.21 mm (height) and 41.72 mm (width).
- Measurement errors ranged from 2.98% to 7.00%.
Conclusions:
- Conventional gastrointestinal endoscopes can provide data for 3D analysis.
- Epipolar geometry can be applied to calculate object size using standard endoscopic images.
- This technique shows promise for quantitative 3D measurements in endoscopy.
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