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Journal of Ultrasound in Medicine, Vol 10, Issue 2 77-82, Copyright © 1991 by American Institute of Ultrasound in Medicine
Evaluation of in vitro measurement accuracy of a three-dimensional ultrasound scanner
D. L. King, D. L. King Jr and M. Y. Shao
Columbia University College of Physicians and Surgeons, New York, New York 10032.
We have constructed a three-dimensional (3-D) ultrasound scanner to make
examinations easier and more accurate. The accuracy of the 3-D scanner has
been determined by scanning a three-dimensional model. Lengths, angles, and
volume of the model were computed and compared to values determined from
physical measurement. Distances between image planes were computed with a
mean error of 0.4% of true value. Volume was computed with a mean error of
1.6%, or 0.64 mL +/- 0.72 mL (1 SD). We conclude that the 3-D scanner has a
system error of less than 0.4%, that it does not introduce significant new
errors, and that the principal source of measurement error is poor lateral
resolution due to ultrasound beam width. We believe that the 3-D scanner
may be a clinically useful instrument for quantitative echographic
measurements.
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