tiny in order to be inserted into the standard endoscope so unlike standard endoscopy like colonoscopy for example which only detects the surface of the lumen or the colon right so here we want to image beyond the surface these standard colonoscopy or upper GI endoscopy will miss anything beyond the surface we want to see deeper right seven millimeters is sufficiently deep in terms of the GI wall right so that allows us to see the deeper structures by providing both photo acoustic and ultrasonic contrast mechanisms so this