Not being able to image inside the lungs is probably only a minor limitation really. There's also inside the head, and inside the rib cage is going to be awkward too due to bones.
Also ultrasound just isn't that good of an imaging technology, even with full aperture.
That said, it's non-ionising and if they can make this reasonably cheap (big if), then it's better than nothing at all. Probably decent for finding cancer, especially breast cancer (no pesky bones there!).
Also ultrasound just isn't that good of an imaging technology, even with full aperture.
That said, it's non-ionising and if they can make this reasonably cheap (big if), then it's better than nothing at all. Probably decent for finding cancer, especially breast cancer (no pesky bones there!).