“Why do you have to drink water before a CT scan?”
I am a 17 year old male. I want to know why do you have to drink water before a CT scan?
1 Answer
Two objects that are of the same density, are difficult to tell apart. Think, the front wall of the stomach is the same density as the back wall of the stomach. If the two are touching each other, it's hard to sort them out. However, if you put something of a different density in between them, then they are separate and can evaluate individually. So, water in the stomach helps to evaluate for abnormalities like ulcers and masses.
