J Korean Soc Med Ultrasound.  1998 Mar;17(1):73-77.

Volume Measurement Using 3-Dimensional US

Abstract

PURPOSE: To evaluate accuracy and interobserver variation of volume measurement of three-dimensional ultrasonography in balloon phantoms similar to gallbladder experimentally.
MATERIALS AND METHODS
Two observers measured volume of water-filled balloon phantoms of 10, 30, 50, 70, 90mL, similar to gallbladder, ten times, respectively, using sum of cylinders method of three-dimensional ultrasound. The measurement error and interobserver variation were assessed.
RESULTS
The mean of difference between actual and measured volume was less than 5% in all balloon phantoms. The mean difference between actual and measured volume was the largest (4.4%) in 10mL balloon phantom and about 1% in the others. The mean difference between measurements of two observers was about 1% in all balloon phantoms. The standard deviation was the largest (4.4%) in 10mL balloon phantom and decreased according to increasing volume of balloon.
CONCLUSION
Three-dimensional ultrasonography was an accurate volume measurement method with acceptable interobserver variation.

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