How to Read Your MRI or CT Scan Report: A Plain-English Guide
More people now see their scan report before their doctor calls. This guide explains how a radiology report is laid out and what its most common phrases usually mean.
Quick answer
A radiology report usually has six parts: the type of exam, the reason for the scan, a comparison with earlier scans, the technique, the findings, and the impression. Read the impression first — it is the radiologist's summary and recommendations. “Unremarkable” means normal; “no acute abnormality” means nothing needing urgent action; “incidental” means an unexpected finding unrelated to why you were scanned, and these are often harmless; “clinical correlation” means your doctor should connect the finding to your symptoms and other results. Always go through the report with your doctor.
Why you might see your report before your doctor does
In the United States, the 21st Century Cures Act information-blocking rules mean many patient portals now release imaging reports as soon as they are signed, often before a clinician has called. In a 2023 survey of 8,139 patients at four US academic medical centres, 95.7% preferred getting results immediately. Among those who saw results before hearing from a clinician, 7.5% said it made them more worried — rising to 16.5% when the results were abnormal.
In England, the NHS App can also show test results that your healthcare professional has not yet discussed with you, though hospital imaging reports appear less consistently than GP-ordered tests.
The six sections of a radiology report
Layouts vary between hospitals, but most reports follow the same order.
- Exam: what was scanned and how, for example “MRI brain without contrast”.
- History or indication: your symptoms and why the scan was ordered.
- Comparison: earlier scans the radiologist looked at to see what is new or unchanged.
- Technique: how the scan was performed. This is mainly for the record.
- Findings: each area described as normal, abnormal, or possibly abnormal — including important things that were not seen.
- Impression or conclusion: the radiologist's summary and any recommendations. This is the most important part.
Common words and what they usually mean
These are general meanings. What a word means for you depends on the rest of your report and your history, which is why your doctor's reading matters.
- Unremarkable: normal; nothing of concern seen.
- No acute abnormality (or no acute findings): nothing that needs urgent action.
- Incidental finding: something unexpected that is unrelated to why you were scanned.
- Clinical correlation recommended: your doctor should interpret the finding alongside your symptoms, examination, and other tests.
- Stable or unchanged: no meaningful change compared with an earlier scan.
- Pertinent negative: a specific problem the radiologist looked for and did not find.
Incidental findings are common
Finding something unexpected on a scan is very common, and most of these findings are not serious. Cleveland Clinic notes that lung nodules show up on about one in three chest CT scans, thyroid nodules on up to 68% of imaging that includes the thyroid, and liver nodules on about 15% of CT scans. Many need no action, or only a repeat scan to check they have not changed.
How to prepare for the conversation with your doctor
RadiologyInfo, the patient site run by the Radiological Society of North America and the American College of Radiology, advises against assuming what a report means before you have discussed it. Writing questions down in advance helps.
- What does the impression mean for me specifically?
- Is any finding related to my symptoms, or incidental?
- Do I need further tests, a follow-up scan, or a referral — and when?
- Has anything changed since my last scan?
- Is there anything I should watch for in the meantime?
Getting a plain-English explanation
Radily, part of the Zapx Labs portfolio, explains CT, MRI, and X-ray reports in plain English for $4.99 per report. It is limited to what your report says, and it adds a glossary and questions to take to your doctor. Like this guide, it is educational and does not replace your doctor's interpretation, diagnosis, or advice.
Key takeaways
- Read the impression first; it is the radiologist's summary.
- “Unremarkable” means normal and “no acute abnormality” means nothing urgent.
- Incidental findings are common and usually harmless, but ask whether yours needs follow-up.
- Write your questions down before you see your doctor.
- Explanations, from this guide or a tool, are educational — your doctor's reading is the one that counts.
FAQ
Sources
- RadiologyInfo — How to read your head CT report
- RadiologyInfo — How to read your brain MRI report
- RadiologyInfo — Discussing your report results
- Cleveland Clinic — Incidental findings
- JAMA Network Open (2023) — Patient perspectives on immediate release of test results
- HealthIT.gov — Information blocking
- NHS — Test results in the NHS App
- NHS — MRI scan
- NHS — CT scan
Consumer Health
Explore Radily
Upload your radiology report and get a clear explanation of what it says — constrained to the report itself, never adding to it — so you can walk into your next appointment with the right questions.