Which is NOT an x-ray contrast medium?
I fail to understand what your question has to do with Home Theatre.
Why does contrast for a CT scan make you feel heat all over your body? What is the mechanism for this?
It can be an allergic reaction... I had a CT scan w/contrast a couple of years ago... I had the same experience... About 15 minutes after the scan was finished... I had additional symptoms of hives and swelling and had to be injected with Benadryl... About 30-40 minutes later the symptoms were gone completely... Amazing stuff that Benadryl... Yes, granny.. I think iodine was the culprit.. Although, I had the same thing done previously and there were no symptoms.. It's interesting how we can develop an allergy to something we were never allergic to.... Edit: Two thumbs down for describing a personal, Dr. confirmed experience with contrast dye? Which just happens to be the subject? You guys over in "medicine" are a tough audience... :-)
Is plastic visible on x rays? Some web sites say no, or that it depends on the type?
It's not exactly true. It depends on the plastic and what kind of X-ray. High KV's used for thicker body parts will not show the plastic, but a low KV used for a hand for example you can see plastic. Even the so called radiolucent back boards are visible. For the most part they don't interfere with the image but you can still see them. edit: IV catheters are made to be radiopaque (visible on an x-ray). If you had one in your vein it is visible on an x-ray.