When looking at US images, it is important to READ THE LABEL--because the images are low resolution and tend to have a lot of noise, it is hard to see enough anatomic detail to be sure where you are without help! So most images have clear labels that tell you the imaging PLANE and the LOCATION of the image. The sound beam is sent out in a plane from the transducer, and the echos are returned and picked up by the same transducer, as shown by the yellow arrows. What are the other (unlabeled) white areas on the image?

other white areas