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Computer-aided volume measurement of choroidal melanomas
Australian and New Zealand Journal of Ophthalmology
|November 1, 1987
Summary
This study presents a method for measuring choroidal melanoma volume using ultrasound imaging and computer analysis. This technique allows for accurate tumor monitoring, with demonstrated precision for volumes over 100 mm3.
Area of Science:
- Ophthalmology
- Medical Imaging
- Biomedical Engineering
Background:
- Choroidal melanomas require accurate volume measurement for effective monitoring.
- Conventional methods may lack the precision needed for small tumor volume assessment.
Purpose of the Study:
- To develop and validate a novel method for measuring choroidal melanoma volume.
- To assess the accuracy and reproducibility of the proposed ultrasound-based technique.
Main Methods:
- Utilized B-scan ultrasonography combined with computer image digitization and area analysis.
- Developed a specialized water-bath and linear tracking B-scan transducer system.
- Employed successive ultrasound image slices for volume calculation.
Main Results:
- Demonstrated the ability to measure choroidal melanoma volumes greater than 100 mm3.
- Achieved an average measurement error of 6% in eye models.
- Presented a system with required instrumentation and computer software.
Conclusions:
- The developed ultrasound technique provides a viable method for monitoring choroidal melanoma volume.
- The system shows promising accuracy for clinical application in ophthalmology.
- Further discussion addresses calibration, resolution, reproducibility, and error sources.