then you have the raster scan that's one way of getting an image 3d image another way is to use a ray of transducers so for example like the ringing array I showed right so we basically for the reign of 512 elements surrounding the head of animal or a body of animal or wherever we want an image like the breast then we use a broad field light illumination we don't focus light here at all we just light light photons basically bathe the tissue you generate the 3d volumetric source then your ring is going to detect signals from a slice