FibroScan (liver scan)
A quick, usually not painful scan that measures how stiff your liver is, to estimate scarring (fibrosis) and, on most machines, how much fat is in it.
✓ Medically reviewed by a GMC-registered consultant · last reviewed September 2026 · next review September 2027 · how we review
In short
- It is a quick, usually not painful scan that estimates liver scarring (fibrosis) and usually liver fat, without needles or radiation.
- It gives a number, not a full diagnosis: it cannot say why the liver is affected, and a normal result does not rule out all liver disease.
- Readings can be unreliable in some people — for example with a high body weight, fluid in the abdomen, or recent food or alcohol — so preparation and a valid reading matter.
- Results should be interpreted by a specialist alongside blood tests and your history, not read as a single number in isolation.
A plain-English summary. The detail — including risks and recovery — is below.
At a glance
A general guide. Your specialist will give you advice for your situation.
Usually not painful and quick, with no needles, sedation or radiation.
When a valid reading is unlikely, such as significant fluid in the abdomen (ascites).
You lie still while the operator takes the readings. You may feel light vibrations but no pain.
A specialist interprets the reading with your blood tests and history.
You lie still while the operator takes the readings. You may feel light vibrations but no pain.
The gel is wiped off and you can leave and eat normally. There are no restrictions.
Some clinics give you the numbers on the day, but a specialist usually interprets them alongside your blood tests...
Depending on the findings you may be reassured and discharged, offered lifestyle support or treatment, asked to...
What is a FibroScan?
FibroScan is a brand name for transient elastography, a special type of ultrasound scan of the liver. A probe rests on the skin over your liver and sends a gentle pulse (a vibration) into it, then measures how fast that pulse travels.
The pulse moves quickly through a stiff, scarred liver and more slowly through a soft, healthy one, so the reading (measured in kilopascals) gives an estimate of scarring, called fibrosis. Most machines also give a separate reading called CAP, which estimates how much fat is in the liver.
The scan is quick and usually not painful and does not use needles or radiation. It is mainly used to check people who have, or are at risk of, liver disease — for example from fatty liver, alcohol, or hepatitis — and to follow how things change over time.
A FibroScan gives a number, not a full diagnosis. It cannot tell you why your liver is affected, and it can be less reliable in some people, so the result is always read alongside blood tests, your history and sometimes other scans.
Types, options & approaches
There may be different ways to do this. The right approach depends on the clinical question and your circumstances.
FibroScan vs other liver tests
| Test | What it shows | Trade-off |
|---|---|---|
| FibroScan | Estimate of scarring and fat | Quick and usually not painful, but only an estimate and less reliable in some people |
| Blood fibrosis scores | Estimate from blood markers | No scan needed, but also indirect |
| Ultrasound / MRI | Liver structure, lumps, fat | Shows anatomy, but stiffness needs special techniques |
| Liver biopsy | Direct look at liver tissue | Most detailed, but invasive with small risks |
Tests are often combined; a biopsy is reserved for when scans and blood tests do not give a clear enough answer.
Preparing for your test
- Do not eat for the time you are told beforehand — many UK clinics ask for about 3 hours, as recent food can raise the stiffness reading.
- You can usually sip water during this time; avoid fizzy drinks and large amounts of fluid.
- Avoid alcohol for a day or two before if advised, as it can affect the reading.
- Wear loose clothing that lets the probe reach the right side of your chest and tummy.
- Tell the team if you are or might be pregnant, or if you have an implanted device such as a pacemaker, as advice may differ.
- Mention if you have a lot of fluid in your abdomen (ascites) or a very high body weight, as a different probe or test may be needed.
- Bring details of your liver history and recent blood tests if you have them.
What happens
You lie on your back with your right arm raised above your head to open up the spaces between your ribs. A small amount of gel is put on the skin over the right side of your tummy, and the operator places the probe between your ribs.
The probe sends a gentle pulse into the liver. You may feel a light vibration or flick, but it does not hurt. The operator takes a series of readings — usually around ten valid measurements — to get a reliable median value.
The whole scan usually takes 5 to 15 minutes. There is no recovery needed; you can get up and carry on with your day straight away. The numbers are then reviewed, often by a liver specialist, who interprets them with your blood tests and history.
Is this test right for me?
A good consultation should explore whether it's the right choice for you now — including reasons to wait or consider something else.
May not be suitable if…
- When a valid reading is unlikely, such as significant fluid in the abdomen (ascites).
- As the only test to rule out liver disease, since early changes can be missed.
- In people with an implanted active device where the manufacturer advises against it — check first.
- When symptoms suggest urgent liver problems that need direct assessment rather than a screening scan.
Delay or rearrange if…
- You have eaten recently or had alcohol, against the clinic's instructions.
- You have an active flare of liver inflammation (very high liver blood tests), which can falsely raise stiffness.
- You have acute heart failure with fluid overload.
- You are unwell with an acute illness that can be assessed once you have recovered.
Alternatives to discuss
- Blood-based fibrosis scores as a first step or alongside the scan.
- Ultrasound or MRI for liver structure and fat.
- MR elastography where available and the FibroScan is unreliable.
- Liver biopsy when non-invasive tests do not give a clear enough answer.
- Monitoring over time rather than a single test.
Before you decide
Use this as a shared-decision checklist. The aim is not just “can this be done?”, but whether it is right for you, now, with the risks and alternatives clearly understood.
What matters most to me?
Think about symptoms, daily life, work, caring responsibilities, sport, fertility, travel, appearance and anxiety — the right choice depends on your priorities, not just the medical facts.
What are all my options?
Ask about waiting, monitoring, medicines, rehabilitation, a smaller or larger procedure, a different test, NHS referral, or a second opinion where that would help.
What would make me pause?
Active infection, pregnancy, unstable medical problems, smoking, medicines that increase bleeding, poor support at home, or feeling pressured are all reasons to slow down and get tailored advice.
What happens if I do nothing today?
For some problems, waiting is safe; for others, delay can make treatment harder. A good consultation should explain the trade-off in plain English.
Benefits
- Usually not painful and quick, with no needles, sedation or radiation.
- Gives a useful estimate of liver scarring without a biopsy in many people.
- Usually also estimates liver fat in the same scan.
- Can be repeated easily to monitor change over time.
- A reassuring result can help avoid an invasive liver biopsy.
- Helps identify people who may need closer monitoring or referral.
Risks & complications
- An unreliable or invalid reading that needs repeating or a different test
- Mild over- or under-estimation of scarring depending on conditions on the day
- A 'grey zone' result that does not clearly place you in low or high risk
- A falsely high reading from recent food, alcohol, liver inflammation or heart failure
- Difficulty getting any valid reading in people with a high body weight or fluid in the abdomen
- Incidental concern that leads to further, sometimes invasive, tests
- False reassurance if a near-normal reading is taken to rule out liver disease that is actually present
- Over-reliance on a single number without the wider clinical picture
FibroScan is very safe physically — the main risks are about accuracy. Recent food, alcohol, active liver inflammation, heart failure and a high body weight can all push the reading up or make it unreliable. Ask whether your reading was valid (enough measurements with low variability) and how it fits with your blood tests before drawing conclusions.
Published figures to discuss
FibroScan is accurate enough to be very useful, but its accuracy depends on the underlying liver condition, the threshold chosen, the probe used and whether the reading was valid. It performs best at detecting advanced scarring (cirrhosis) and less well at distinguishing milder grades, where 'grey zone' results are common. Reported accuracy figures come from research studies and may be better than everyday practice, so they should be read with caution.
| Figure | Reported range | How to interpret it | Source / confidence |
|---|---|---|---|
| Accuracy for detecting cirrhosis | Area under the curve about 0.93-0.96 in studies | Best performance is for advanced scarring; this is a research measure, not a guarantee for an individual. | Guide sourcesClinical context |
| Accuracy for significant fibrosis | Area under the curve about 0.80-0.84 in studies | Less reliable for milder scarring, where borderline results are common and other tests help. | Guide sourcesClinical context |
| Failed or unreliable reading | Recognised, especially with obesity, narrow rib spaces, ascites or poor probe contact | A valid report should include reliability measures, not just a stiffness number. | Guide sourcesClinical context |
| False elevation of liver stiffness | Recognised | Acute inflammation, cholestasis, congestion and eating shortly before the scan can make stiffness look worse than fixed scarring. | Guide sourcesClinical context |
These are literature figures, not a personalised prediction. Your own risks and likely benefits depend on your circumstances, your health, and how your care is carried out and followed up.
What happens afterwards
There is no physical recovery from a FibroScan. You can eat, drive and go back to normal activities immediately. The 'afterwards' is mainly about waiting for a specialist to interpret the numbers.
- No physical effects at all afterwards
- Possibly a little leftover gel on the skin, easily wiped away
- A short wait for the result to be interpreted
- Sometimes a request to repeat the scan if the first reading was not reliable
Aftercare
- Eat, drink and go back to normal activities straight away.
- Ask whether your reading was valid and what the number means for you.
- Have your blood tests reviewed alongside the scan rather than focusing on the number alone.
- If liver fat or scarring was found, ask about lifestyle steps such as alcohol, weight and diabetes control.
- Keep any follow-up or repeat-scan appointments so change can be tracked.
- Contact your clinician if you develop new symptoms such as jaundice or swelling while waiting.
- Fasting time confirmed with the clinic
- Loose clothing for the right side of the tummy
- List of medicines and recent blood tests ready
- Note of alcohol intake to discuss honestly
- Questions about what the result will change
- Follow-up or repeat-scan plan understood
⚠ Get urgent help if…
- Yellowing of the skin or eyes (jaundice)
- Swelling of the tummy or legs
- Vomiting blood or passing black, tarry stools
- Confusion or unusual drowsiness
- Severe tummy pain
- Any of these need urgent medical attention, separate from the scan itself
Who to contact: your clinician, clinic or test provider first (keep their number to hand). For urgent advice when you can't reach them, call NHS 111. In an emergency, call 999.
General guidance — it doesn't replace the specific advice your specialist gives you.
Results & realistic expectations
A good FibroScan result is a valid reading (enough measurements with low variability) that helps place your risk of liver scarring as low, intermediate or high, and that fits with your blood tests and history. A low reading is reassuring about advanced scarring, and a high reading prompts closer attention and sometimes referral.
The scan cannot say why your liver is affected, and a normal reading does not rule out all liver disease — early changes, some inflammation and other problems can be missed. Readings near the borderline are common and may simply mean the test should be repeated or combined with other information.
A FibroScan reflects your liver around the time of the scan. Scarring and fat can change — sometimes improving with weight loss, treating the cause or stopping alcohol, and sometimes worsening — so repeat scans are often used to follow the trend. How often you need a repeat depends on your underlying condition and your specialist's advice.
Related tests, treatments or support
FibroScan is usually combined with blood tests (including liver function and fibrosis scores), and sometimes ultrasound or MRI, to build a fuller picture. The CAP fat reading and the stiffness reading are taken together in the same scan on most machines.
Follow-up & long-term care
Results are normally discussed with you, in clinic or by letter, alongside your blood tests. If scarring or fat is found, you should be told what it means, what you can do about it, when to repeat the scan, and whether you need referral to a liver specialist.
- Repeat scans at the interval your specialist advises to track change
- Ongoing attention to alcohol, weight and diabetes if relevant
- Regular blood tests as part of liver monitoring
- Vaccinations and other liver-protective steps if recommended
Repeat, follow-on and what comes next
- Invalid or unreliable readings happen and the scan may need repeating, sometimes with a different probe.
- Borderline ('grey zone') results often need blood tests or repeat scanning rather than a one-off conclusion.
- Readings can change over time, so monitoring is part of normal care rather than a sign of error.
Ask what happens if the result is unclear or needs repeating, and what is included if further tests or follow-up are needed.
What good aftercare looks like
- A specialist interprets the reading with your blood tests and history.
- A clear explanation of your scarring and fat result and what it means.
- Practical advice on the cause (alcohol, weight, diabetes, hepatitis) where relevant.
- A defined plan for repeat scanning, monitoring or referral.
What affects the cost
Costs vary a great deal between people and providers, and we don't publish prices. What matters is understanding what drives the cost and making sure your quote is complete. The main things that affect it:
- Whether the scan includes both the stiffness and the CAP fat reading
- Whether a specialist consultation to interpret the result is included
- Whether blood tests are done at the same visit
- The clinic or facility fee and the type of probe needed
- Whether repeat monitoring scans are part of a package
- Any further tests, such as MRI or biopsy, prompted by the result
- The fee for the scan and whether the fat (CAP) reading is included
- Whether a liver specialist will interpret and explain the result
- Whether a follow-up appointment or letter is included
- What happens, and what it costs, if the reading is invalid and needs repeating
- Whether blood tests are included or charged separately
- The plan and cost for any onward tests if the result is abnormal
On the NHS? FibroScan is widely available on the NHS for people with, or at risk of, liver disease; private scans are also offered, sometimes for faster access or regular monitoring.
You're entitled to your total cost in writing — including reports, follow-up and what happens if the result is inconclusive — before you decide.
Consent traps and marketing red flags
These are not small details. They are often where patients lose choice, time to reflect, or realistic expectations.
Consent traps
- Not being told the scan estimates scarring rather than diagnosing the cause.
- A near-normal reading being presented as proof the liver is healthy.
- Not being told that food, alcohol or inflammation may have affected the reading.
- A single number being acted on without blood tests and the wider picture.
Marketing red flags
- Offering a FibroScan as a stand-alone 'liver MOT' that 'rules out liver disease'.
- Presenting a single reading without checking it was valid or interpreting it in context.
- Implying it can replace all other liver tests in everyone.
- Selling repeat scans more often than a specialist would advise.
Choosing a specialist safely
- Check the specialist is on the GMC Specialist Register for this area.
- Make sure they work at a CQC-registered service, and look for membership of the relevant Royal College or professional body.
- You're entitled to time to consider and to have your questions answered before you agree — the specialist who looks after you should explain it, not a salesperson.
- Be wary of pressure: time-limited offers or deposits taken before you've had time to think are red flags, not bargains.
- You're entitled to your total cost in writing — including any follow-up — before you decide.
Questions to ask your medical professional
Take this to your consultation. A good specialist will welcome every one of these.
- Was my reading valid, and how confident are you in the number?
- What does my score mean for my risk of liver scarring?
- How does this fit with my blood tests and the cause of my liver problem?
- Do I need any further tests, such as a biopsy or MRI?
- What can I do to improve my liver, and when should the scan be repeated?
- Could anything on the day (food, alcohol, inflammation) have affected my result?
- Are you on the GMC Specialist Register for this area, and which Royal College or professional body are you a member of?
- Will you be the specialist who carries out my test, and who looks after me afterwards?
- What are the risks for someone like me, and how often do your own patients have a problem or need it repeated or redone?
- What does a realistic result look like — and what can this test not achieve?
- What are my options, including waiting, doing nothing for now, or choosing a different approach?
- Can I have written information, results and aftercare instructions in a format I can use, including any accessibility or communication support I need?
- What is the total cost in writing, including any follow-ups, and how much time do I have to decide?
Frequently asked questions
Does a FibroScan hurt?
Do I need to fast beforehand?
Can it replace a liver biopsy?
Why might my reading be unreliable?
Does a normal result mean my liver is fine?
Is it available on the NHS?
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How we made this page
Medically reviewed by a GMC-registered consultant. Written in plain English, checked against NHS, NICE, GMC and relevant Royal College / specialist-society guidance, and kept under review. No clinic paid to appear on this page, and we publish no pricing. This is general information to help you prepare — it is not a substitute for advice from your own clinician. How we review our guides →
Source hierarchy: UK regulator and NHS/NICE guidance first, then relevant Royal College or specialist-society guidance, then peer-reviewed evidence for procedure-specific figures where available.
Sources & standards: British Liver Trust — Transient elastography (FibroScan) NICE NG49 — Non-alcoholic fatty liver disease: assessment Guy's and St Thomas' NHS — FibroScan for liver inflammation Diagnosis of cirrhosis by transient elastography — PMC Diagnostic accuracy of FibroScan and factors affecting measurements — PMC Transient elastography vs biopsy in chronic hepatitis C — PMC
Reviews reflect patients' experience of care, not clinical outcomes. For procedure volumes and outcome data see PHIN.
Last medically reviewed 2026-09-21. Spotted something wrong or out of date? Report an error in this guide.
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