Medical Oncologist
CION Cancer Clinics
Whole-body MRI: what the scan day involves | CION Cancer Clinics
A whole-body MRI means lying still on a padded table for around an hour while a noisy scanner takes pictures from head to feet. It uses no radiation and does not hurt. For people with Li-Fraumeni syndrome it is the centre of the yearly check-up plan. This page walks through the day, from what to bring and wear to how children are helped and when results arrive. At CION Cancer Clinics, our oncologists plan screening and care for families with an inherited cancer syndrome, explained in plain words.
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Medically reviewed by Dr. Naresh GunduConsultant Medical Oncologist · MBBS, DNB (Internal Medicine), DM (Medical Oncology, AIIMS) · last reviewed September 2026, next review due September 2027
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On this page
- What happens on the day of a whole-body MRI?
- How should you prepare for the scan?
- What happens from arrival to going home?
- What do the terms on the scan day mean?
- What does the scan see well, and what needs another test?
- What this page cannot tell you
- Four things people worry about, and what is actually true
- Common questions about the whole-body MRI day
The short answer
What happens on the day of a whole-body MRI?
You lie on a padded table that slides slowly through a tunnel-shaped scanner while it takes pictures from your head to your feet. It uses magnets and radio waves, not radiation, and it does not hurt. The scan itself usually takes around an hour, and most of the effort is simply lying still while the machine knocks and hums.
Why TP53 carriers have this scan
People with Li-Fraumeni syndrome can develop tumours almost anywhere in the body. A whole-body MRI looks at bones, muscles and organs in one sitting, without the radiation of a CT scan. That matters because TP53 carriers are more easily harmed by radiation. Most plans repeat the scan once a year.
What usually happens alongside it
A separate brain MRI is often done at the same visit, because brain tumours need a more detailed look. Sometimes a dye called contrast is injected for that part. Young children often need sedation or a light anaesthetic, which changes how the morning runs, so the team will send separate instructions.
Read your appointment letter the day before. It says whether you need to stop eating, and that instruction varies between scans.Before you leave home
How should you prepare for the scan?
A little preparation makes the day shorter and avoids being sent back to change or to fetch a document.
Papers to carry
The radiologist compares this scan with the last one, so earlier pictures matter as much as the new ones.
Bring with you
- Your TP53 report or clinic letter
- Previous MRI reports and discs
- Details of any implant, stent or clip
Clothes and metal
Wear loose clothing with no zips, hooks or metal threads, or expect to change into a gown. Leave jewellery, hairpins and watches at home. Phones and cards stay in a locker outside the scanner room.
Food and medicines
Adults having a plain scan can usually eat and take their normal medicines. If contrast or sedation is planned, you will be told when to stop eating. Follow the letter rather than general advice.
Preparing a child
Explain the noise and the tunnel in simple words. Bring a favourite toy or blanket. If a light anaesthetic is planned, keep strictly to the fasting times, because a late snack can mean the scan is cancelled.
Not sure whether this applies to you?
Ask an oncologistStep by step
What happens from arrival to going home?
The safety check
A staff member goes through a checklist about pacemakers, implants, metal fragments, pregnancy and past surgery. Answer carefully, because the magnet is always on.
Getting positioned
You lie on your back. Light, flexible frames called coils are placed over your body to pick up the signal. You get earplugs or headphones and a call button to hold.
The scan itself
The table moves in stages from head to feet. Each stage makes loud knocking sounds. For the chest and abdomen you may be asked to hold your breath for a few seconds at a time.
The brain scan and contrast
If a brain MRI is planned, it follows straight on. If contrast is needed, a small needle goes into a vein in your arm and the dye is given through it.
Going home
Adults can usually leave straight away and carry on as normal. A child who had an anaesthetic is watched until fully awake and allowed to eat again.
Words you may hear
What do the terms on the scan day mean?
- Coil
- A light frame placed over part of your body that works like an aerial, picking up the signal to make clearer pictures.
- Sequence
- One set of pictures taken in a particular way. A whole-body scan is made of many sequences, which is why the noise keeps changing.
- Breath-hold
- A short pause in breathing, when asked, so that the chest and abdomen pictures are not blurred by movement.
- Contrast
- A dye given into a vein that makes some tissues stand out. It is not radioactive and is used only when it adds useful detail.
- Sedation
- Medicine that makes a child drowsy or asleep so they lie still. A light general anaesthetic is used when sedation is not enough.
- Radiologist
- The doctor who reads the pictures and writes the report that goes to your oncologist.
Leave a number, we will call you
One field. No form to fill in, and no charge for the call.
Side by side
What does the scan see well, and what needs another test?
Whole-body MRI sees well
Checked by a separate test
Tumours of bone and soft tissue
Breast, by a dedicated breast MRI
Organs of the abdomen and pelvis
Brain, by a detailed brain MRI
Adrenal glands and kidneys
Stomach and bowel lining, by camera tests
Larger changes in the chest
Very small spots in the lungs may be missed
Growths in the limbs and spine
Skin and blood, by examination and blood tests
Being straight with you
What this page cannot tell you
It cannot tell you what your own scan shows. The report is written by a radiologist for your oncologist, and it often mentions small findings that sound worrying but are common and harmless. Wait for the doctor who knows your history to explain it, rather than reading the report alone at night.
It cannot interpret your genetic result
What your specific variant means is a question for the counsellor who ordered the test. That includes whether yearly whole-body MRI is right for you, and at what age it should begin or change.
Who this does not apply to
Whole-body MRI is not a general health check. For people without a confirmed high-risk gene fault, it tends to find harmless changes that lead to worry, extra scans and sometimes biopsies. Most people do not need it, and paying for one privately without a reason rarely helps.
Families from districts can ask for the whole-body scan, brain scan and clinic visit to be booked on the same day.Commonly believed
Four things people worry about, and what is actually true
"MRI gives you radiation, just like CT."
It does not. MRI uses a magnetic field and radio waves. That is exactly why it is chosen for TP53 carriers, who need to keep radiation to a minimum over a lifetime of scans.
"If I feel closed in, I will have to abandon the scan."
Many people who dislike small spaces manage with a mirror, music, a blanket or a person beside them. Tell the team early. A mild calming medicine can sometimes be arranged in advance.
"No news on the day means bad news."
Results are rarely given on the scan day, because the radiologist needs time to read hundreds of pictures carefully. Silence at the scanner tells you nothing either way.
"Being called back means cancer has been found."
Most recalls are to take a closer look at something unclear, and most of those turn out to be harmless. A recall is part of how the programme works.
Questions we are asked
Common questions about the whole-body MRI day
How long will I be at the hospital?
Allow most of a morning or afternoon. The scan takes around an hour, with extra time if a brain scan follows. Paperwork, changing and waiting add more. A child having an anaesthetic needs time to wake up and recover before going home.
Does the scan hurt?
No. The only discomfort is the noise, lying still for a long time, and a small needle if contrast is needed. You can speak to the radiographer through an intercom throughout. Ask for a blanket or a cushion under your knees if that helps.
Can a parent stay with a child in the room?
Often yes, once the parent has passed the same metal safety check. A parent's voice or hand can help an older child manage without sedation. For a child under anaesthetic, you usually wait outside and are called back as they wake.
Is the contrast dye safe?
It is widely used and serious reactions are uncommon. Tell the team about kidney problems, allergies or a previous reaction. It is used only for parts of the scan where it adds useful detail, most often the brain, and not for every picture.
When will I get the results?
Not usually on the day. The radiologist reads the scan and sends the report to your oncologist, who explains it at a follow-up visit or by phone. Ask at the scan desk how and when you will hear, so that you are not left waiting without knowing.
What if I might be pregnant?
Tell the team before the scan. Routine surveillance scans are often postponed or adapted in pregnancy, and contrast is usually avoided. Your oncologist will plan how checks continue during pregnancy and breastfeeding without leaving long gaps in the programme.
Can I drive or go back to work afterwards?
After a plain scan, yes. If you took a calming medicine, arrange for someone else to take you home and rest for the day. After a child's anaesthetic, plan a quiet rest of the day at home before normal routines resume.
Is whole-body MRI available in Hyderabad?
Yes, at larger centres with modern scanners and radiologists used to reading these scans. Not every centre can do it, so ask before booking. Call the CION helpline and we will help you arrange the scan alongside the rest of your surveillance plan.
Your Specialists
Meet CION's oncologists. Bring your family history or genetic report to them.
Our medical oncologists see people with a strong family history of cancer, arrange genetic counselling and testing where it fits, and plan the checks that follow.
Medical Oncologist
Dr. C. Raghavendra Reddy
MBBS(Gold Medal), DNB(General Medicine), DM(Medical Oncology)(Gold Medal)
Medical Oncologist
Dr. Bharati Devi Gorantla
MBBS, MD(General Medicine), DM(Medical Oncology)(Adyar,Chennai), ECMO, MRCP SCE(UK)
Medical Oncologist
Dr. Owais Mohammed
MBBS, MD (General Medicine), DrNB (Medical Oncology), ECMO, MRCP SCE (Medical Oncology) (UK)
Medical Oncologist
Medical Oncologist
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Sources
- GeneReviews (NCBI) — Li-Fraumeni Syndrome
- MedlinePlus Genetics — Li-Fraumeni syndrome
- NHS — MRI scan
- National Cancer Institute — Genetic Testing for Inherited Cancer Susceptibility Syndromes
This page is general information, not a prescription. Do not change or stop any treatment based on what you read here. If anything is worrying you, contact your own treating team — or call our helpline and we will help you reach the right specialist.
Keep reading
Related pages
The Toronto protocol: surveillance explainedWhere the yearly scan fits in the full check-up planLiving with annual whole-body screeningCoping with the wait for results, year after yearDeciding whether to test children for TP53Why children in TP53 families start scans youngLi-Fraumeni syndrome: the full clinical pictureThe cancers the scan is looking for
Talk to us
Need a whole-body MRI arranged?
Tell us who in your family needs the scan and whether a child is involved. We will help you book it alongside the brain scan and clinic visit where we can. One helpline serves every CION centre.