Volume measurement by ultrasonic transverse or sagittal cross-sectional scanning (original) (raw)
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In Vitro Evaluation of an Ultrasonic Three-Dimensional Imaging and Volume System
Ultrasonic Imaging, 1982
A method is described for developing three dimensional organ reconstructions and volumes from a series of arbitrarily oriented real time ultrasonic scans. In vitro evaluations of this method assessed the accuracy of three dimensional point determination and the accuracy of volume determination. The overall repeatability error of three dimensional point determination was found to be 0.6 cm in the horizontal direction and 0.3 cm in the vertical direction; most of this error was caused by the ultrasound resolution and errors in the 3D position locator. The accuracy of volume determination was assessed on balloons, kidneys and left ventricular molds. Thirty volume trials on 10 balloons gave 27 out of 30 calculations within 1.8 percent of true volume. Eighteen trials on 6 kidneys gave 17 out of 18 calculations within 5.1 percent of true volume. Fifteen trials on 5 human left ventricular molds gave 13 out of 15 calculations within −5.9 percent of the true volume. It is concluded that this...
In vitro evaluation of three-dimensional ultrasonography in volume estimation of abdominal organs
Ultrasound in medicine & biology, 1994
The purpose of this study was to evaluate the accuracy and precision of a three-dimensional (3D) ultrasound system in volume estimation of abdominal organs in vitro. A mechanical sector scanner coupled to a stepping motor recorded images of porcine stomach and kidneys. The transducer was tilted through 88 degrees yielding 81 frames, and volume estimation was performed digitally after interactive manual contour indication and organ reconstruction in 3 dimensions. This 3D system showed good correlation (r = 0.998) between estimated and true volumes. Volume estimation of stomach and kidneys using 3.25 MHz probe demonstrated limits of agreement of 0.877 to 1.146 and 1.007 to 1.125, respectively, depicting estimated volumes as a proportion of true volumes in 95% of the examinations. Intra- and interobserver variation of the tracing procedure revealed low values. We conclude that this 3D ultrasound system performs high accuracy and precision in volume estimation.
Donald School Journal of Ultrasound in Obstetrics and Gynecology, 2012
Purpose This study evaluates the accuracy and reliability of off-line volume measurement using virtual organ computer-aided analysis (VOCALTM) and two-dimensional (2D) ultrasound by novices. Methods Thirty medical students, 15 sonographers and three experts were recruited to measure a liver, a gestational sac and a breast cancer lesion using 2D ultrasound and threedimensional (3D) VOCALTM method. The VOCALTM measurements produced by the experts were used as the gold standard for comparison. Accuracy and reliability were assessed by analysis of variance followed by a mean separation procedure. Results The t-test revealed with statistical significance that in measuring the liver, students outperformed sonographers regardless of 2D or VOCALTM methods; also, VOCALTM generated more accurate measurements than 2D ultrasound in both groups. In regards to the gestational sac, students continued to perform well with both 2D and VOCALTM while the sonographers were accurate by using VOCALTM onl...