CT scan of neck with contrast?

Hi! I just went to a ENT to check my swollen lymphs nodes on my neck. He sent me to get a CT scan of my neck with contrast. So, I wonder how this is done... I've never had any CT scan or anything done and I wonder, is the contrast injected? or do I have to swallow it? does it hurt? etc. Your answers will be appreciate it
Thank you!

The contrast that is used really depends on your doctor. It is not painful and should not bother you at all. A contrast agent (e.g., iodine-based dye, barium solution) may be administered prior to CT scan to allow organs and structures to be seen more easily. Contrast agents can be administered through a vein (IV), by injection, or taken orally. Patients usually are instructed not to eat or drink for a few hours prior to contrast injection or IV because the dye may cause stomach upset. Patients may be required to drink an oral contrast solution 1鈥? hours before CT scan of the abdomen or pelvis.

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