CT Scan Results: How to Read and Understand Your Radiology Report

• Radiology report = Radiologist's written interpretation of your CT scan images
• Two main sections: "Findings" (detailed description) and "Impression" (summary conclusion)
• "Unremarkable" = Normal (good news in radiology!)
• "No acute findings" = No new or urgent problems found
• "Clinical correlation recommended" = Radiologist wants your doctor's input to interpret findings
• Results sent to ordering doctor = Radiologist sends report to doctor who ordered scan (not directly to you usually)
• Wait for doctor's explanation = Radiologist provides image interpretation; your doctor explains what it means for your health

Our radiology report guidance is based on report standards, medical terminology, and patient communication research.

Data Sources Analyzed:

Who Writes the Report?

Radiologist: Medical doctor (MD or DO) who specializes in:

• Interpreting medical images: CT, MRI, X-ray, ultrasound
• 4-6 years residency training: After medical school
• Board-certified (most): In radiology
• Writes report: Based on image interpretation

Not the technologist:

• Technologist performs scan: Captures images
• Technologist cannot interpret: (not trained, not allowed to provide diagnosis)
• Technologist captures: What radiologist interprets

Report Timeline

When will results be ready?

Urgent scans (emergency department):

• STAT read: Radiologist prioritizes urgent scans
• Preliminary report: Within 30 minutes
• Final report: Completed within 24 hours

Standard Report Structure

Most CT reports follow this structure:

Let's break down each section:

Exam/Procedure

Identifies the scan performed:

Examples:

• "CT of the head without contrast"
• "CT of the chest with intravenous contrast"
• "CT of the abdomen and pelvis with and without contrast"
• "CT angiography of the chest"

What to check:

• Correct body area: Head vs. chest vs. abdomen?
• Correct contrast status: With or without contrast?
• Correct extent: Chest only vs. chest/abdomen/pelvis?

Clinical Indication

Reason scan was ordered:

Examples:

• "Clinical indication: Headache"
• "Clinical indication: Suspected appendicitis"
• "Clinical indication: Staging of known lung cancer"
• "Clinical indication: Abdominal pain of unknown etiology"

What to check:

• Does indication match why you had scan?
• Is indication specific? ("Abdominal pain" vs. just "Pain")

Technique

Technical details of scan:

Typical content:

• "5 mm slices obtained from [body part] through [specific area]"
• "Images obtained in the [arterial/venous] phase"
• "Multiplanar reformations obtained"
• "3D reconstructions performed"

Translation to plain language:

• "5 mm slices": Scan captures 5 mm cross-sections of body
• "Arterial phase": Images captured 30 seconds after contrast injection
• "Venous phase": Images captured 70 seconds after contrast injection (shows different things)
• "Multiplanar reformations": Computer creates images in different planes (sagittal, coronal)
• "3D reconstructions": Computer creates 3D model from scan data

Most patients: Don't need to understand technique section - it's for technical documentation.

Comparison

Prior imaging comparison:

Examples:

• "Compared to CT scan from 06/15/2025"
• "No prior imaging available for comparison"
• "Interval change: [finding] has increased/decreased/stable since prior examination"

What comparison tells you:

• Is this new or old?: Problem seen on prior scans
• Is it changing?: Growing, shrinking, stable
• Is it better or worse?: Improvement or progression of disease

What Findings Contains

Detailed description of what radiologist sees:

Example Findings section:

FINDINGS:

Lungs:
- Clear bilaterally. No pulmonary nodules, masses, or consolidations.
- No pleural or pericardial effusion.
- Cardiac size normal.

Liver:
- Enlarged (18 cm craniocaudal dimension). Fat sparing suggests fatty change.
- No focal liver lesions.
- Gallbladder, biliary ducts, spleen unremarkable.

Pancreas:
- 2.5 cm cystic lesion in pancreatic tail. Cannot characterize on CT.
- Pancreas otherwise normal.

Kidneys:
- 1.2 cm hypodense lesion in right mid-kidney. Concerning for renal cell carcinoma.
- Left kidney normal. No hydronephrosis.

Aorta:
- No aneurysm. Vessel caliber normal.
- No significant atherosclerotic calcification.

Lymph nodes:
- No pathologically enlarged lymph nodes.
- No lymphadenopathy.

Bones:
- No fractures or lytic lesions.
- Degenerative changes in lumbar spine.

Common Terminology in Findings

Body-Specific Findings

Head/Brain CT findings:

Chest CT findings:

Abdominal CT findings:

What Is the Impression?

Impression = Conclusion:

Summary of most important findings:

• Diagnoses: What radiologist thinks findings represent
• Urgent findings: What needs immediate attention
• Recommendations: What should happen next (clinical correlation, follow-up)

Example Impression:

IMPRESSION:

1. 1.2 cm right renal mass. Concerning for renal cell carcinoma.
   Recommend: Clinical correlation, urology referral, consider MRI for further characterization.

2. Fatty liver (enlarged liver with fat deposition).
   Recommend: Clinical correlation with liver function tests.
   Follow-up: Ultrasound in 6-12 months if clinically indicated.

3. 2.5 cm pancreatic tail lesion. Cannot characterize on CT.
   Recommend: MRI with MRCP for further characterization.

4. No acute findings in chest, bones, or lymph nodes.

Common Impression Terminology

Numbered Format

Findings grouped in Impression:

Impression items listed in order of importance:

1. Most important: Findings needing immediate attention
2. Secondary: Findings that are important but not urgent
3. Minor: Findings that are incidental or not clinically significant

Example:

IMPRESSION:
1. Right renal mass concerning for renal cell carcinoma (most important, urgent)
2. Fatty liver (important but not urgent)
3. Pancreatic cyst (needs characterization but not urgent)
4. No acute findings (reassurance)

Scenario 1: Normal Scan

Impression:

IMPRESSION:
1. No acute abnormality.
2. Normal CT scan.

What this means:

• ✅ Normal scan: No problems found
• ✅ No acute issues: Nothing urgent or new
• Translation: Everything looks normal

Scenario 2: Incidental Finding

Impression:

IMPRESSION:
1. 4 cm adrenal nodule in left adrenal gland.
   Clinical correlation recommended.

What this means:

• ⚠️ Incidental finding: Found by chance, not what scan was looking for
• Adrenal nodule: Abnormal growth on adrenal gland
• Clinical correlation: Radiologist wants doctor to check hormone levels
• May be benign: Most adrenal nodules are benign
• May need workup: Hormone tests, possibly follow-up scan

Scenario 3: Urgent Finding

Impression:

IMPRESSION:
1. Large saddle embolus in main pulmonary artery.
   Life-threatening condition. Immediate attention required.

What this means:

• 🚨 PE (pulmonary embolism): Blood clot in lung arteries
• 🚨 Life-threatening: Emergency, needs immediate treatment
• Next steps: Blood thinners, hospital admission

Scenario 4: Needs Follow-Up

Impression:

IMPRESSION:
1. 1 cm lung nodule in right upper lobe.
   Cannot characterize benign vs. malignant.
   Recommend: Follow-up CT in 3 months to assess stability.

What this means:

• ⚠️ Lung nodule: Small spot in lung
• ⚠️ Uncertain: Could be benign (scar, infection) or malignant (cancer)
• ⚠️ Stability assessment: If nodule doesn't grow over 3 months, likely benign
• Next steps: Repeat CT in 3 months to check for growth

Scenario 5: Clinical Correlation Needed

Impression:

IMPRESSION:
1. 2 cm liver lesion. Cannot characterize on CT.
   Clinical correlation recommended with liver function tests and history of cirrhosis.

What this means:

• ⚠️ Liver lesion: Abnormal area in liver
• ⚠️ CT can't tell: What it is (tumor, cyst, benign lesion)
• ⚠️ Clinical context: Radiologist needs:
  • Liver function tests: Blood tests showing liver function
  • History of cirrhosis: Risk factor for liver cancer
• Next steps: Doctor considers clinical context to decide on next steps (MRI, biopsy, follow-up)

How Results Are Delivered

Typical timeline:

Emergency scans:

• Preliminary report: Within 30 minutes
• Final report: Within 24 hours
• Doctor contacts you: Immediately if urgent findings

How You Receive Results

Methods of receiving results:

What you receive:

• Verbal explanation: Doctor explains findings in plain language
• Copy of report: Sometimes provided (especially if seeing specialist)
• Images: Usually not provided unless requested (separate process)

Understanding Your Results

Ask your doctor:

1. "What does 'unremarkable' mean?" - Confirm it's normal
2. "What are the key findings?" - What problems found, if any
3. "Is this serious?" - How concerning are findings?
4. "What caused this finding?" - Underlying cause
5. "What happens next?" - Treatment, monitoring, more tests
6. "Do I need a follow-up scan?" - When, why
7. "Should I see a specialist?" - Which specialist
8. "Can you explain these medical terms?" - Plain language explanation

If Results Are Unclear

"Clinical correlation recommended":

What radiologist means:

• CT shows abnormality
• Cannot determine significance without clinical context
• Your doctor provides: Clinical information (symptoms, labs, history)
• Together determine: What abnormality means

Example:

• CT shows: 2 cm liver lesion
• Radiologist: "Cannot characterize. Clinical correlation recommended."
• Your doctor provides:
  • History of hepatitis C: Risk factor for liver cancer → lesion concerning
  • Normal liver function tests: Less concerning → may be benign
  • Symptoms of weight loss: More concerning for cancer
• Together decide: Need liver MRI, biopsy, or follow-up CT

If You Disagree with Results

If findings make sense with your symptoms:

• Agreement: CT findings match clinical picture
• Next steps: Treat based on diagnosis
• Follow-up: Repeat scan if monitoring response to treatment

Example:

• CT shows: Appendicitis (inflamed appendix)
• Symptoms: Right lower abdominal pain, fever
• Agreement: CT and symptoms consistent
• Next steps: Surgery to remove appendix

If You Disagree with Results

If findings don't match your symptoms:

Example:

• CT shows: Normal
• Symptoms: Severe abdominal pain, vomiting
• Discrepancy: CT doesn't explain symptoms

Your options:

• Ask about alternative imaging: MRI, ultrasound might show what CT misses
• Ask about clinical correlation: "CT normal but I'm in pain - what's next?"
• Second opinion: Different radiologist may review same images differently
• Follow your gut: If symptoms persist, advocate for further evaluation

Requesting Your Report

How to get radiology report:

Requesting Your Images (DICOM)

How to get your images:

Why get DICOM images:

• Second opinion: Specialist can review your images
• Personal records: Keep for your files
• Comparison: Future radiologists can compare to current scans

What to ask for:

”

"I'd like a copy of my CT scan in DICOM format. Can you put this on CD or provide electronic download?"

Common Follow-Up Scenarios

Incidental lung nodule:

Adrenal nodule:

Liver lesion:

When to Consider Second Opinion

Reasons to seek second opinion:

How to get second opinion:

1. Bring DICOM images: On CD or portable drive
2. Bring radiology report: Copy of original report
3. Bring clinical information: Symptoms, lab results, history
4. Ask specific questions: "What does this lesion look like to you? How certain are you?"

Second opinion outcomes:

• Agrees with original: Reinforces diagnosis, treatment plan
• Disagrees with original: Different interpretation, different recommendation
• Adds certainty: Either way, more confident in diagnosis

Discussing Your Results

Ask these questions to understand your results:

1. "What are the main findings?" - Summary of important findings
2. "What is the diagnosis?" - What do the findings represent
3. "What caused this?" - Underlying cause or explanation
4. "Is this concerning?" - How serious are the findings
5. "What are my options?" - Treatment, monitoring, watch and wait
6. "Do I need more tests?" - MRI, biopsy, lab tests
7. "How soon do I need treatment?" - Urgency of treatment
8. "What happens if I don't treat?" - Risks of no treatment
9. "What should I watch for?" - Symptoms that should prompt urgent call
10. "When should I follow up?" - Timeline for next appointment

If Diagnosis Is Serious

Receiving serious diagnosis (cancer, aneurysm, etc.):

1. Take time to process: It's OK to feel shocked, scared, overwhelmed
2. Ask questions: Understand your diagnosis
3. Ask about treatment options: Surgery, medication, radiation
4. Ask about prognosis: What to expect
5. Ask about specialists: Should you see cancer specialist, vascular surgeon?
6. Bring support person: Family member, friend to appointment for help listening, asking questions
7. Consider second opinion: Especially for serious diagnoses or major treatments
8. Take notes: Hard to remember everything when stressed

"Clinical Correlation Recommended"

What this means:

Radiologist needs clinical context:

• CT shows: Abnormal finding
• CT alone cannot determine: What abnormality is
• Doctor provides: Clinical context (symptoms, labs, history)
• Together determine: Significance of finding

Example:

• CT shows: 1.5 cm lung nodule
• Risk factors: Smoking history, family history of lung cancer
• Clinical correlation: Radiologist needs to know:
  • Smoking history: 30 pack-years (high risk) → more concerning
  • Age: 65 years old → risk factor for cancer
  • Symptoms: Cough, weight loss → concerning
  • Prior imaging: Nodule new (vs. seen on old scan and stable) → concerning
• With risk factors: Likely recommends biopsy
• Without risk factors: May recommend follow-up CT

Bottom line: "Clinical correlation recommended" means radiologist can't make definitive diagnosis without clinical context.

"Cannot Characterize"

What this means:

CT shows abnormality but can't tell what it is:

Why "cannot characterize"?

• CT limitations: CT shows size, shape, density, but not specific
• MRI often better: MRI often can characterize what CT cannot
• Biopsy definitive: Only way to know for sure is tissue sample

Next steps:

• MRI: Often next step for further characterization
• PET scan: For lesions that might be cancer
• Biopsy: definitive diagnosis (but invasive)
• Follow-up CT: Watchful waiting to see if grows

Understanding your CT report:

• ✅ "Findings" = Detailed description of everything scan showed
• ✅ "Impression" = Summary conclusion, most important findings
• ✅ "Unremarkable" = Normal (good news!)
• ✅ "No acute findings" = Nothing urgent or new (usually good)
• ⚠️ "Clinical correlation recommended" = Needs doctor's input to interpret

Getting results:

• ✅ From ordering doctor: Not from radiologist (usually)
• ✅ Wait for doctor's call: Usually 3-5 days after scan
• ✅ Ask for copy of report: For your records, second opinion
• ✅ Ask questions: If you don't understand, ask doctor to explain

Most important: Radiology reports contain medical terminology that can be confusing. Always discuss your results with your ordering doctor, who can translate the report into plain language and explain what the findings mean for your health. Don't rely on Dr. Google or your own interpretation of radiology reports.

Related articles on WellAlly:

• Can CT Scans Be Wrong? Understanding CT Accuracy
• Medical Imaging Second Opinion Guide
• Understanding Your Radiology Report: Patient Guide
• What Happens During a CT Scan? Complete Guide