More just interested in medical imaging in general but: unobstructed soft tissue imaging is possible with this, e.g. abdomen. You can get reasonably good differentiation between types of tissues using ultrasound in this context although there is the potential for ambiguous findings where further scans like MRI will be required to get less ambiguous information about it.

Chest cavity, brain tissue scanning etc. will likely remain unrealistic as ultrasound waves won't penetrate bone and the ribs and skull will interfere.