Enhancement: Meaning in a Radiology Report

Also written as: enhancing, contrast enhancement, contrast uptake, post-contrast enhancement

Enhancement means an area turns brighter on CT or MRI after a contrast agent is injected, because the agent reaches it through the blood.

What it means

For some CT and MRI scans, a contrast agent is injected into a vein. It travels with the blood, so tissues with a rich blood supply turn brighter on the later pictures. That brightening is called enhancement. Normal structures such as blood vessels and the kidneys enhance too. Healthy brain tissue has a barrier that keeps contrast out, so enhancement within it suggests the barrier has become leaky.

When it matters

Enhancement is neither good nor bad by itself, because healthy tissue enhances too. Radiologists focus on enhancement that is new or unusual for that spot. Some patterns also draw attention, such as a ring around a lesion, a solid nodule inside a cyst, or a thickened lining. Simple cysts do not enhance inside, while solid growths, benign or not, usually do. Unclear enhancement is often compared with older scans or rechecked.

Questions to ask your doctor

Is the enhancement in my report normal for that part of the body?
What does the pattern of enhancement suggest this could be?
Does this enhancement need a follow-up scan or another test?

General information, not medical advice. What a finding means for you depends on your symptoms, your history and the images themselves, so talk your results through with a doctor.