@sandyabbey , I've had so many different kinds of scans! Some were CT scans, some MRI's, some used contrast dyes or barium...usually at the time I was too sick to ask a lot of questions. Sometimes they find where the adhesion is, and other times they can't locate it (even though I'm having all the pain, vomiting, and bloating to make it obvious there is a blockage).
Have you asked your doctors specifically about the possibility of an obstruction? Mine are generally acute and very obvious, and resolve themselves in a day or so, but I think others can be more chronic. If you've had a lot of abdominal surgeries and you're having pain, etc., you should ask your GI about it.
I hope you're feeling a lot better soon!