Endoscopic ultrasound (
EUS) or
echo-endoscopy is a medical procedure in which
endoscopy (insertion of a probe into a hollow organ) is combined with
ultrasound to obtain images of the
internal organs in the
chest ,
abdomen and colon. It can be used to visualize the walls of these organs, or to look at adjacent structures. Combined with Doppler imaging, nearby blood vessels can also be evaluated.