I believe CO2 has been employed in colonic and angiographic imaging
iodine
It is usually a barium or iodine dye
Yes, barium is a contrast medium and is actually one of the most common of the contrast mediums used in enemas and other x-ray based tests. Iodine is another contrast medium that is quite common.
Patients who develop an allergic reaction to the contrast medium used in angiography may experience a variety of symptoms, including swelling, difficulty breathing, heart failure, or a sudden drop in blood pressure
A contrast medium
A contrast agent
There are at least a couple of radiographic studies of the kidneys and ureters using a contrast medium. In an intravenous pyelogram, or IVP, contrast medium is injected into a vein prior to imaging. In a VCUG, contrast medium is injected into the bladder to create an image.
no
After administration of anesthesia, the doctor will insert a thin, tubelike instrument called a catheter through the patient's urethra and into the bladder. The contrast medium is then injected through the catheter
Water soluble contrast media
I don't know about acidic or alkaline reactions, but in neutral conditions the reaction of iodine with starch is a dark purple color
An Iodinated Contrast Medium