When using oral contrast for simulation, how much prior to simulation do you have patients drink the contrast?

There are primarily three situations in which I might use oral contrast. The first is when treating an esophageal cancer, in which case we give the patient a small amount of contrast in the simulator and then have them drink some more just seconds before the scan. The second situation is when one wa...

I would also add that the downside of giving oral contrast is that some contrast can remain in the stomach and cause stomach distention. When you are giving neoadjuvant, adjuvant or palliative doses this is a not an issue. However if you're giving ablative doses such as we are now giving for pancrea...

What contrast agent do you use, and how is it 'prepared' (dilution level?)