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Journal of Ultrasound in Medicine, Vol 14, Issue 12 881-886, Copyright © 1995 by American Institute of Ultrasound in Medicine
Distance and volume measurement using three-dimensional ultrasonography
M. Riccabona, T. R. Nelson, D. H. Pretorius and T. E. Davidson
Department of Radiology, University of California, San Diego 92093-0610, USA.
The purpose of this study was to assess the accuracy of distance and volume
measurements obtained by three-dimensional ultrasonography. A
tissue-mimicking phantom was scanned using a prototype three-dimensional
sonographic imaging system to verify distance measurements. Measurements
were taken from the reconstructed three-dimensional sonographic data and
compared to the real distances. Volume measurements were obtained by
scanning 30 balloons of various shapes, sized 23 ml to 2400 ml. Each
balloon was scanned twice in two orientations; three different masks were
accomplished for each volume. Each volume measurement of 180
three-dimensional sonographic measurements was compared to conventional
two-dimensional ultrasonographic volume estimates and to the actual,
measured balloon size. Distance measurements had a mean error of 0.02 +/-
3.65% (range, -4.27 to 7.18%). Two-dimensional sonographic volume estimates
using traditional scanner based methods had a mean error of 13.7 +/- 10.1%.
Three-dimensional sonographic volume measurements had a mean error of 2.2
+/- 2.9% for regular and irregular objects over the entire range of
volumes. The masking required 10 to 30 min. The field of view varied from
10 to 24 cm with a mean object depth of 9.8 cm. Three-dimensional
ultrasonographic methods can provide accurate volume measurements of
regular and irregular objects and offer improved accuracy compared to
traditional two-dimensional methods.
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