使用三维超声体外测量前列腺体积的准确性
Accuracy of prostate volume measurements in vitro using three-dimensional ultrasound.
作者信息
Elliot T L, Downey D B, Tong S, McLean C A, Fenster A
机构信息
Department of Diagnostic Radiology and Nuclear Medicine, University Hospital, University of Western Ontario, London, Canada.
出版信息
Acad Radiol. 1996 May;3(5):401-6. doi: 10.1016/s1076-6332(05)80673-7.
RATIONALE AND OBJECTIVES
We assessed the ability of a three-dimensional (3D) ultrasound imaging system to measure accurately prostate volume.
METHODS
Multiple two-dimensional ultrasound images of cadaver prostates scanned in a water bath were reconstructed into three-dimensional (3D) images. The volumes of the prostates were calculated from these 3D images and compared with the actual volumes. Multiple 3D ultrasound volume readings were evaluated for precision.
RESULTS
The slope of the best-fit line correlating 3D ultrasound estimated volume and true volume was 1.006 +/- 0.007. The average error was 0.36 +/- 1.17 cm3; the coefficient of determination (r2), which is the measure of the straight-line relationship, was .9997; and the standard error was 1.15 cm3.
CONCLUSION
Three-dimensional ultrasound images accurately reflect true prostate volumes measured in vitro.
原理与目的
我们评估了三维（3D）超声成像系统精确测量前列腺体积的能力。
方法
在水浴中扫描的尸体前列腺的多个二维超声图像被重建为三维（3D）图像。从这些3D图像计算前列腺体积，并与实际体积进行比较。评估多个3D超声体积读数的精度。
结果
将3D超声估计体积与真实体积相关联的最佳拟合线的斜率为1.006±0.007。平均误差为0.36±1.17立方厘米；决定系数（r2），即直线关系的度量，为0.9997；标准误差为1.15立方厘米。
结论
三维超声图像准确反映了体外测量的真实前列腺体积。
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