Contrast-enhanced CT

Contrast-enhanced CT A CT scan takes X-rays from many different directions and then uses a computer to put them together into a 3d picture. Compared with plain X-rays, CT uses 10 – 100 times more radiation. Using a contrast dye with a CT scan makes it easier to see finer detail. This is important for a screening like Jan’s because the doctor just noticed a small spot, and we want to know whether it is dangerous. 

The main severe side effect of contrast-enhanced CT scans is kidney damage for people who already have kidney disease. Does Jan have kidney disease? If not, is he at risk of getting kidney disease? The risk factors for kidney disease include hypertension, diabetes, cardiovascular disease, an age of > 60 years and a family history of kidney disease. 

There are two main types of contrast agents used: iodine-based and gadolinium-based.