Doppler ultrasonic scanner

例句：

1. 1.The Doppler ultrasonic scanner was used to detect the blood flow in the arteries.
   多普勒超声波扫描仪被用来检测动脉中的血流。
2. 2.The doctor used the Doppler ultrasonic scanner to diagnose the patient's heart condition.
   医生使用多普勒超声波扫描仪来诊断病人的心脏状况。
3. 3. The Doppler ultrasonic scanner is a valuable tool for medical professionals in their diagnostic work.
   多普勒超声波扫描仪是医疗专业人员在诊断工作中的一种宝贵工具。