Hi Danny,My husband has gallbladder attacks whenever he eats fatty foods, and his test turned out just fine. I wonder if it has to be done during an attack to discover anything! That's what my husband thinks.
I remember a situation where a doc husband of my friend got a surgeon to take out someone's gallbladder (even though it had been judged healthy by all tests) and indeed, it was diseased.
I guess problems can be missed...
Good luck!
Denise