McDicken W N
Ultrasound Med Biol. 1986 Mar;12(3):245-9. doi: 10.1016/0301-5629(86)90315-7.
Versatility in test-objects for ultrasonic Doppler units is desirable. The test-object described comprises a thin-walled plastic tube embedded in tissue-mimicking material. Blood is simulated using a mixture of water and glycerol with sephadex particles to act as scatterers. The test-object is suitable for use with a wide range of Doppler units which employ pulsed and continuous ultrasound in the frequency range 1 to 10 MHz. Calibration of several types of Doppler and imaging duplex systems has been performed for flow velocities up to 100 cm/s through a 10 mm tube. Above this velocity, for this tube dimension, turbulence occurs prevents the accurate measurement of flow velocity. The versatility of the test-object is further enhanced by the feasibility of manufacturing vessels of different shape and size. Slow flow through the tissue equivalent material may also be detected.
超声多普勒设备的测试对象具有通用性是很理想的。所述测试对象包括嵌入仿组织材料中的薄壁塑料管。使用水和甘油的混合物以及葡聚糖颗粒作为散射体来模拟血液。该测试对象适用于多种多普勒设备，这些设备在1至10 MHz的频率范围内采用脉冲和连续超声。已经对几种类型的多普勒和成像双工系统进行了校准，以测量通过10毫米管的流速高达100厘米/秒的情况。对于此管径，高于此速度时会出现湍流，从而妨碍流速的准确测量。通过制造不同形状和尺寸的血管的可行性，进一步增强了测试对象的通用性。也可以检测到通过组织等效材料的缓慢流动。
