Understanding your radiology report: a complete guide for patients
Every radiology report has five sections: Clinical History (why the scan was ordered), Technique (how it was done), Comparison (prior studies reviewed), Findings (detailed observations), and Impression (the radiologist's summary and conclusions). The Impression is the most clinically important part — it's where the radiologist tells your doctor what matters and what to do next.
Getting a radiology report back can feel like reading a foreign language. Terms like "hypodense lesion," "mild cardiomegaly," and "no acute intracranial abnormality" are precise medical shorthand — but they don't help you if you have no idea what they mean before your follow-up appointment.
This guide walks through every section of a standard radiology report, explains what the most common phrases actually mean, and tells you what to do once you've read it.
The five sections of every radiology report
Regardless of whether your scan is a CT, MRI, X-ray, or ultrasound, nearly every radiology report follows the same structure:
Clinical History / Indication
This is a brief summary of why you had the scan — written by your ordering physician. It gives the radiologist context (e.g., "shortness of breath," "rule out pulmonary embolism," "follow-up of known lung nodule"). If this section is sparse or inaccurate, it can affect how the radiologist interprets the images.
Technique
This section describes how the scan was performed — the type of imaging (CT, MRI, PET, etc.), whether contrast was used, which body region was covered, and technical parameters. For patients, this section is rarely important to understand in detail. What matters is whether contrast was used: contrast-enhanced studies provide more information about blood flow, lesion characteristics, and active inflammation.
Comparison
If the radiologist had access to your previous imaging studies, they will compare them here. Phrases like "compared to CT chest dated [date]" or "no prior studies available for comparison" appear in this section. Comparison studies are extremely valuable — they let the radiologist tell whether something is new, stable, or resolved.
Findings
This is the detailed body of the report. The radiologist describes what they observed, organized by anatomical region or organ system. Each area is described separately — for a chest CT, you might see subsections for lungs, pleura, mediastinum, heart, bones, and soft tissues.
The Findings section documents everything the radiologist observed — including normal, incidental, and possibly significant things. A long Findings section does not necessarily mean something is wrong. It means the radiologist was thorough.
Impression
This is the most important section for patients. It's the radiologist's clinical interpretation — a numbered or bulleted summary of the most significant findings, their clinical relevance, and any recommended follow-up. If your report ends with "No acute findings" in the Impression, it means the radiologist saw nothing requiring urgent attention.
Common phrases and what they actually mean
"No acute findings" / "No acute abnormality"
This is one of the most reassuring phrases in radiology. It means the radiologist saw nothing new, sudden, or urgent. It doesn't mean the scan was completely clear — there may be chronic conditions or incidental findings — but nothing requires emergency intervention.
"Unremarkable"
In medical language, "unremarkable" is a good thing. It means normal — nothing worthy of remark. An "unremarkable liver" is a normal-appearing liver. Patients sometimes find this word unsettling, but radiologists use it to mean nothing abnormal was seen.
"Cannot exclude" / "Cannot rule out"
These phrases signal radiologist uncertainty. When a radiologist writes "cannot exclude malignancy," they are saying the images are ambiguous and further evaluation (another scan, biopsy, clinical correlation) is needed before that possibility can be ruled out. This is not a diagnosis — it's a flag for your physician to investigate further.
"Clinical correlation recommended"
This means the radiologist wants your physician to put the imaging findings together with your symptoms, examination, and lab results. Radiology is one piece of the clinical picture — this phrase is a reminder that the images alone are not sufficient for a diagnosis.
"Stable" / "Unchanged" / "No significant interval change"
These phrases, when compared to a prior study, are generally reassuring. A finding that has not grown or changed over months or years is less likely to be aggressive or malignant.
"Recommend follow-up"
Follow-up recommendations are common and don't always indicate something serious. They may mean: a finding is too small to characterize fully, a benign finding should be confirmed as stable, or the radiologist wants to check whether a finding resolves on its own. Ask your physician specifically why follow-up is recommended.
What to do after reading your report
Reading your own radiology report is your right — but interpreting it without clinical context can cause unnecessary anxiety. Here is a sensible approach:
- Read the Impression first. This is the summary. If it says "no acute findings" and nothing is flagged for follow-up, the scan is largely reassuring.
- Look up unfamiliar terms — but be careful about catastrophizing. Most radiology terms describe anatomical observations, not diagnoses.
- Write down your questions before your follow-up appointment. Bring the report with you.
- Ask your physician specifically about any finding in the Impression and what action (if any) is required.
- Request your DICOM files if you want to keep your original images. You are entitled to them.
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Frequently asked questions
What does "no acute findings" mean on a radiology report?
"No acute findings" means the radiologist did not see anything requiring urgent attention. It does not necessarily mean nothing was found — there may be chronic or incidental findings — but nothing appears new, sudden, or immediately dangerous.
What is the difference between findings and impression?
The Findings section lists detailed observations about each anatomical area. The Impression is the summary and clinical interpretation — what the findings mean and what the radiologist recommends. The Impression is typically the most clinically important part of the report.
Should I be worried if my report has a lot of findings?
Not necessarily. Radiology reports document everything observed, including normal variants, incidental findings, and benign age-related changes. Many findings are not clinically significant. The Impression section is where your radiologist flags anything requiring attention.
Can I get a copy of my radiology report?
Yes. Under HIPAA (in the US), you have the right to access your medical records including radiology reports. You can request them from your imaging center, hospital, or patient portal. You are also entitled to the actual DICOM image files.
Medical disclaimer: This article is for educational purposes only and does not constitute medical advice. Always discuss your imaging results with a qualified physician. If you have symptoms that concern you, seek care promptly.