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Volume estimation from multiplanar 2D ultrasound images using a remote electromagnetic position and orientation
S W Hughes1, T J D'Arcy, D J Maxwell
1Department of Medical Physics, Guy's and St. Thomas' Hospital Trust, London, UK.
Ultrasound in Medicine & Biology
|January 1, 1996
Summary
This study presents a novel system for calculating organ volume using 2D ultrasound images and 3D reconstruction. The ray tracing method demonstrated high accuracy for medical volume calculations.
Area of Science:
- Medical imaging
- Computational geometry
- Ultrasound technology
Background:
- Accurate volume measurement is crucial in medical diagnostics and research.
- Existing methods for volume calculation from ultrasound images have limitations.
Purpose of the Study:
- To develop and validate a system for calculating volume from multiplanar 2D ultrasound images.
- To assess the accuracy of different volume calculation methods, including ray tracing.
Main Methods:
- A system was developed using a personal computer with a video digitizing card and an electromagnetic tracking device.
- Ultrasound images were acquired and transformed into 3D space.
- Volume was calculated using ellipsoid, planimetry, tetrahedral, and ray tracing methods.
- Accuracy was validated by comparing calculated volumes with actual volumes of balloons, kidneys, and fetal livers.
Main Results:
- The ray tracing method showed the lowest mean percentage error: 0.9% for balloons, 2.7% for kidneys, and 6.6% for fetal livers.
- The system was successfully applied to clinical cases including fetal livers and lungs, neonate brain ventricles, and adult prostate glands.
Conclusions:
- The described system provides an accurate method for calculating volume from ultrasound images.
- The ray tracing algorithm is a reliable method for 3D volume estimation in medical imaging applications.