Hi. I'm new here, and just saw your post. How did it go at the doctors office? Are you going to have to have it out?
I had a HIDA scan last week and it showed I had delayed emptying. It took a long time for my Gall bladder to show up too. I believe it was over an hour. They had me get up and walk around, they tilted the table, and finally they saw it (although I'm not sure it was a very clear picture).
I guess I don't have any answers to your questions. I just wanted to let you know that your not alone. I see the surgeon on the 21st. I will probably have mine out around the first of June.
I hope the doctor was able to give you answers and reassure you.
Good luck.