Peter Attia· MD
the drawback of ultrasound is the resolution doesn't seem to be as high right with ultrasound you're only looking at one slice right so you're only looking at one slice in time and you're basically kind of sweeping through an organ trying to composite those slices together in your brain to try and build that 3d model because like I said our brain always wants to build a 3d model so with ultrasound as you sweep through you get one layer then you get another layer then you get another layer and then eventually that's composited together to see what's going on an ultrasound also seems to really struggle when it encounters air inside the body so if you're trying to do an ultrasound of someone's aorta but their bowel is in front of it it becomes difficult to see for the same reason the bat can't really use high-frequency ultrasound to fly exactly and so that's why when for example you look at a female pelvis you want their bladder to be full because in their bladder being full of fluid it actually acts as a nice window to allow the ultrasound beam to pass right through to be able to see the uterus behind it