able to send back an echo (= a sound that reflects off a surface), and therefore showing as a light area in an ultrasound scan (= a medical examination that produces an image using sound waves)

Ultrasonography revealed large, echogenic kidneys. 超声检查发现巨大的发生回波的肾脏。

4 patients had an abnormal anechoic mass and 1 had an abnormal echogenic mass. 四名患者有异常的无回声团块，一名患者有异常的发生回波的团块。