Recently one of my clients told me that she had an accident and hurt her foot and thought it might be broken. She got x-rays and nothing showed up and was told it was just a sprain. The pain persisted and about a month later, she went to her acupuncturist, who uses a tuning fork to diagnose whether there is a bone fracture. The sound waves vibrate and if there is a fracture, there is a sharp pain at that point. She went back to the doctor and got another x-ray, which showed there was evidence of a fracture that was healing.
It's quite common for x-rays to miss fractures. It is no surprise that sound waves can be used to diagnose, as well as heal.
