How to Read Your Radiology Report: A Patient Guide

You requested a copy of your radiology report. You open it. It reads like a foreign language.

"There is a 4mm T2 hyperintense focus in the right hepatic lobe, likely representing a simple cyst. No suspicious osseous lesions. Mild multilevel degenerative changes of the lumbar spine with disc desiccation at L4-L5."

What does any of that mean? Should you be worried? Let us break it down.

The Structure of a Radiology Report

Every radiology report follows a standard format:

1. Header - Your name, date of birth, and medical record number - Type of exam (e.g., "MRI of the lumbar spine without contrast") - Date of the exam - Ordering physician

2. Clinical History / Indication Why the exam was ordered. Example: "Low back pain radiating to left leg." This helps the radiologist focus on the relevant area and clinical question.

3. Technique How the exam was performed. What type of scan, which sequences, whether contrast was used. This section is mainly for other physicians and you can generally skip it.

4. Comparison Whether the radiologist had prior imaging to compare with. "Comparison: MRI lumbar spine 3/15/2025" is ideal. "No prior comparison available" means this is your first scan of this area (at this facility).

5. Findings The detailed, body-part-by-body-part description of what the radiologist sees. This is the longest section and the most intimidating. We will decode the common terms below.

6. Impression This is the most important section. It is the radiologist's summary and conclusion — the bottom line. If you read nothing else, read the Impression.

The Impression answers: What did we find? Is it significant? What should happen next?

Decoding Common Terms

Describing Findings - Unremarkable — Normal. Nothing abnormal seen. Good news. - Within normal limits — Normal for your age and situation. Also good news. - Benign — Not cancer. Not dangerous. - Incidental or incidentally noted — Found by accident while looking at something else. Usually unimportant. - Stable — Unchanged compared to prior imaging. Almost always reassuring. - Interval improvement — Better than last time. - Interval progression — Worse than last time. - New — Was not there before. Gets attention.

Describing Size and Shape - Well-defined or well-circumscribed — Has clear borders. Usually benign. - Ill-defined or poorly marginated — Has blurry, irregular borders. May need further evaluation. - Homogeneous — Uniform in appearance. Usually benign. - Heterogeneous — Mixed appearance. May need further evaluation. - Focal — Confined to one specific area. - Diffuse — Spread throughout an area.

Describing Brightness (MRI) - Hyperintense — Appears bright on the image. On T2 images, fluid is hyperintense. - Hypointense — Appears dark on the image. - Isointense — Same brightness as surrounding tissue. - Signal abnormality — The tissue does not look like it should on MRI. Could be inflammation, edema, tumor, or other pathology.

Describing Density (CT) - Hyperdense — Appears bright/white. Bone, calcium, fresh blood, and contrast are hyperdense. - Hypodense — Appears dark. Fat, fluid, and air are hypodense. - Hounsfield units for measuring CT density (HU) — A number measuring density. Water = 0 HU, bone = 1,000+ HU, fat = -100 HU.

Common Specific Findings - Cyst — A fluid-filled sac. Almost always benign when "simple." Found in the liver, kidneys, ovaries, and breasts regularly. - Nodule — A small, round or oval finding. Can be benign or malignant depending on context. Size and change over time are key. - Lesion — A general term for any abnormality. It does NOT mean cancer. A bruise is a lesion. A cyst is a lesion. A freckle is a lesion. - Mass — A three-dimensional finding larger than a nodule. Warrants further evaluation but is not necessarily cancer. - Effusion — Fluid where it normally is not (in a joint, around the lungs, around the heart). - Edema — Swelling. Bone marrow edema means the bone is inflamed or stressed. - Degenerative changes — Wear and tear. Extremely common after age 40. Arthritis, disc degeneration, bone spurs. Usually age-appropriate. - Osteophyte — A bone spur. Part of degenerative change. - Disc desiccation — A spinal disc losing water content (drying out). Normal aging. - Disc herniation / protrusion / bulge — Disc material extending beyond its normal boundary. Severity varies widely. - Stenosis — Narrowing. Spinal stenosis = narrowing of the spinal canal. Can be mild, moderate, or severe.

Recommendation Language - No follow-up needed — Exactly what it sounds like. Relax. - Clinical correlation recommended — The radiologist is saying, "This might be important depending on the patient's symptoms — doctor, please connect the dots." - Follow-up recommended in X months — Something needs to be re-checked. Do not ignore this. - Further evaluation with [test] — Another exam is needed to answer the question. - Biopsy may be considered — The finding is suspicious enough that tissue sampling should be discussed. - Recommend urgent/emergent evaluation — Something serious was found. Your doctor will be contacted directly.

The Most Important Advice

1. Read the Impression first. It is the bottom line.
2. Do not Google individual terms. "Hepatic lesion" will terrify you; it usually means a harmless cyst.
3. Findings ≠ symptoms. Many MRI and CT findings are completely normal for your age and cause no symptoms at all. Disc bulges, small cysts, and degenerative changes are found in most adults over 40 — including those with zero pain.
4. Compare to prior. "Stable" is almost always good news.
5. Follow the recommendations. If the report says follow-up, do it.
6. Ask your doctor. They ordered the exam, they know your history, and they can explain the findings in context.

At AMI

We believe patients should understand their imaging results. If you have questions about a report from AMI, talk to your referring physician — our reports are designed to give them the information they need to guide your care.

Need imaging? Call (727) 398-5999 or schedule online.