I've had lithotripsy to destroy kidney stones. If the patches of cancer are smaller than that, then I can imagine it might be more difficult. The trick with li

I've had lithotripsy to destroy kidney stones. If the patches of cancer are smaller than that, then I can imagine it might be more difficult. The trick with lithotripsy is that the stones have to be visible on a regular x-ray machine in order to be able to steer the beams of sound to the correct target. I don't know how you would detect the correct targets with cancer cells, at least not in an immediate feedback system that could be used by the doctors while the patient was on the table.