visual image

名词 visual image:

1. a mental image that is similar to a visual perception
   同义词：visualization, visualisation
2. a percept that arises from the eyes; an image in the visual system
   同义词：visual percept

1. An instrument that in a painless and noninvasive manner uses the differential transmission and reflection of ultrasonic waves to create a detailed visual image of the brain.
   超声波心动描记器一种用来显示详细的大脑图象的仪器，利用超声波发送和反射的差异来测试并无伤无痛