an image obtained by the use of reflected sound-waves, used as a medical diagnostic tool or for marine surveying
I had a mammogram and echogram (ultrasound scan), and was told I was OK.
echogram in American English
(ˈɛkoʊˌgræm)
US
noun
a display or record produced on an oscilloscope by the reflection of ultrasonic waves from tissue: by using this procedure, the abnormal tissue structures can be distinguished from the healthy tissue