I'm not trying to tell you anything, because I'm not an expert. But, Harvard Medical School is expert in this area and they and others who have studied ultrasound effectiveness disagree with your notion that it detects calcified stones only. I've only provided scientific results from several studies based on hundreds of people, please read it. No one in these studies stated that they can see all things. Where do you get that idea?
If you are saying ultrasound doesn’t work, and that US doesn’t detect cholesterol stones, that would be misleading and bad advice. Its works as reported, nothing more, nothing less. US detects both cholesterol and pigment stones 90 to 95 percent of the time, and so it’s highly accurate. Read the report and please, don't shoot the messenger.