Groth D S, Zink F E, Felmlee J P, Kofler J M, James E M, Lindsey J R, Pavlicek W
Department of Diagnostic Radiology, Mayo Clinic, Rochester, Minnesota 55905, USA.
J Ultrasound Med. 1995 Apr;14(4):273-7. doi: 10.7863/jum.1995.14.4.273.
A blood-mimicking flow phantom was used to evaluate the precision of velocity measurements acquired using 25 pulsed Doppler ultrasonographic units from four vendors. Measurements were made at four constant flow rates (12 to 50 cm/s peak velocity). The average standard deviation values of the peak and time-averaged velocities among all units and all flow rates were found to be 7 and 9% of the mean, respectively, while the corresponding values for a subgroup of 20 identical units were 5 and 8%. Considered in conjunction with other published data, this suggests that units should be calibrated to an institutional standard at the time of acceptance testing.
使用一种仿血流动体模来评估来自四家供应商的25台脉冲多普勒超声设备所获取的速度测量精度。在四个恒定流速（峰值速度为12至50厘米/秒）下进行测量。发现所有设备和所有流速下峰值速度和时间平均速度的平均标准偏差值分别为平均值的7%和9%，而20台相同设备的子组的相应值为5%和8%。结合其他已发表的数据来看，这表明设备应在验收测试时按照机构标准进行校准。
