Understanding your scan report
PET-CT Scan Terms — A Plain-English Glossary
When your oncologist orders a PET-CT, you receive a report written for radiologists and doctors. This glossary gives you the plain meaning of the terms that appear most often, so you can read your report and arrive at your next appointment with specific questions rather than general fear.
Medically reviewed by Dr. Bharati Devi Gorantla, Medical Oncologist, MBBS · MD · DM (Adyar, Chennai) · ECMO · MRCP SCE (UK) · Last reviewed September 2026
- Written for doctors, not you — PET-CT reports use technical language designed for radiologists — knowing the terms changes how you read them.
- SUV is a number, not a verdict — The uptake value in your report needs context to mean anything. A number alone does not confirm or rule out cancer.
- Avid does not always mean cancer — Infections, inflammation, and some normal organs also absorb FDG. Your oncologist decides what each finding means.
- Bring questions, not anxiety — Reading the glossary before your appointment turns general fear into specific questions your team can answer.
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A PET-CT report is written for doctors, not for you. The terms that come up most often — SUV, FDG-avid, hypermetabolic, staging — are explained in plain language in this glossary. Read it before your next appointment, then bring your specific questions to your oncologist.
CION offers PET-CT in Hyderabad from Rs 10,499 — among the lowest published prices in the city, with no hidden charges. Indicative price, as of September 2026.
What do the common PET-CT terms mean?
- FDG (fluorodeoxyglucose)
- The radioactive sugar injected into a vein before your scan. Cancer cells tend to use more glucose than normal cells, so they absorb more FDG. The scanner detects where it has concentrated in your body.
- SUV (Standardised Uptake Value)
- A number measuring how much FDG a specific area absorbed. A higher number means more uptake. No single number confirms or rules out cancer — your doctor reads it in the full context of your scan and history.
- FDG-avid
- Describes tissue that has absorbed more FDG than the surrounding area. Avid does not mean cancer automatically — infections, inflamed tissue, and some normal organs are also FDG-avid.
- Hypermetabolic
- Means the tissue is using more glucose than expected for its location. Often used interchangeably with FDG-avid in the body of a report.
- Hypometabolic / cold
- Means an area is using less glucose than the surrounding tissue. This can reflect treated disease reducing in activity, or be a normal variation.
- Physiological uptake
- Normal FDG uptake in organs that naturally use large amounts of glucose — the brain, heart muscle, and urinary tract appear on every PET scan. The radiologist notes these so they are not confused with disease.
- Staging
- Classifying how far a cancer has spread, usually on a scale of I to IV. PET-CT contributes to staging by detecting disease in lymph nodes and distant organs that may look normal on other scans.
- Baseline scan
- The first PET-CT, usually done before treatment begins. All later scans are compared against it to measure whether disease has changed.
- Suggest clinical correlation
- Standard radiology phrasing meaning the finding needs to be linked to your symptoms, history, and other results before a conclusion can be drawn. It is not a warning — it appears on almost every radiology report.
- No FDG-avid lesion detected
- No area of abnormally high uptake was seen on this scan. A favourable finding after treatment, but not a guarantee — very small or metabolically quiet lesions may not appear on PET-CT.
How do you read a PET-CT report without panicking?
Your report is written for doctors, not for you. Technical language is not intended to communicate good or bad news directly — a phrase that sounds alarming may have been entirely expected by your oncologist.
Start with the impression or conclusion section, usually at the end of the report. That is where the radiologist summarises what they found. The rest is the working detail behind that summary.
Read the glossary above before reading the report. Knowing what the terms mean turns general fear into specific questions you can bring to your next appointment.
PET-CT Partner Centres
PET-CT Scan Centres in Hyderabad
CION offers PET-CT scans through 4 trusted partner PET-CT centres across Hyderabad, so you can choose the one closest to you. Call 18002028726 and we’ll guide you to the earliest available appointment.
PET-CT Centre — Punjagutta
PET-CT Centre — Himayatnagar
PET-CT Centre — Narayanaguda
These are partner diagnostic centres within the CION network. Toll-free booking: 18002028726.
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What should I ask my doctor about my PET-CT results?
Ask whether the findings were what they expected. A result that was anticipated usually does not change your treatment plan; one that was not may need further investigation.
Ask which finding, if any, is the one they are watching most carefully. Not all findings on a PET-CT are equally significant, and knowing which one matters helps you focus.
Ask what happens next and when. A scan result almost always informs a decision rather than being the final answer itself.
Did you know?
PET-CT can detect cancer spread in lymph nodes that appear completely normal in size on a standard CT scan, because it shows metabolic activity rather than just anatomy.
Source: ESMO clinical practice guidelines on imaging in oncology staging
What do the most confusing parts of a PET-CT report actually mean?
My report says 'no FDG-avid lesion' — does that mean I am clear?
This is a favourable finding after treatment, and it means no abnormal uptake was seen. However, PET-CT cannot detect every cancer cell — very small lesions, certain tumour types with low metabolic activity, and areas affected by recent surgery or inflammation may not appear. Your oncologist will tell you what this result means for your follow-up plan. Do not interpret it as a guarantee that all disease has gone.
My SUV is higher than my last scan — what does that mean?
SUV numbers change for many reasons, including inflammation, recent infection, and differences in how long you fasted before the scan. Your oncologist reads the number in the context of where it is, what it was before, what treatment you are on, and whether it is in a location being watched. A single number going up is not a conclusion — the pattern across the whole scan is what your team reads.
Can a PET-CT miss cancer?
Yes, and being honest about this is important. Very small deposits, tumours with low metabolic activity, and areas affected by inflammation or recent treatment may not appear clearly. This is why PET-CT is used alongside other investigations and clinical judgement, never as a single definitive test. If your oncologist is concerned about an area the scan did not address clearly, they will say so and suggest further imaging.
Why does the report mention my brain and heart if the scan was ordered for something else?
The brain and heart normally absorb large amounts of glucose, so they show high FDG uptake on every PET scan regardless of why it was ordered. The radiologist notes these as physiological — normal and expected — so they are not confused with a concerning finding elsewhere. Seeing them mentioned in your report is not a sign that something is wrong with your brain or heart.
What is the difference between what the PET shows and what the CT shows?
The CT part shows anatomy — the shape, size, and location of organs, lymph nodes, and any masses. The PET part shows metabolic activity — where the body is using glucose at a higher rate than normal. The two images are combined so the radiologist can say not just that an area is lighting up, but exactly which structure it corresponds to. Neither part alone gives as complete a picture as both together.
Book a PET-CT at CION from Rs 10,499 — among the lowest published prices in Hyderabad — with an oncologist-reviewed report and a free Rs 950 consultation, across 4 partner centres. Indicative price, as of September 2026.
Explore 88 more Understanding PET-CT, Cost, Booking & Records topics
Understanding PET-CT & When It Is Needed
- Can a PET-CT Scan Be Normal and Cancer Still Be Present?
- Can a PET-CT Scan Detect Cancer Anywhere in the Body?
- Do You Need a Biopsy If the PET-CT Is Positive?
- Do You Need a Doctor's Referral for a PET-CT Scan?
- Does a PET-CT Scan Mean I Have Cancer?
- How Accurate Is a PET-CT Scan?
- How Long Does It Take to Get a PET-CT Appointment?
- Is a PET-CT Scan Useful for Cancer Screening in a Healthy Person?
- PET-CT Scan Terminology: A Plain-English Glossary
- PET-CT When the Primary Cancer Cannot Be Found
- PET-CT for Staging: Working Out How Far Cancer Has Spread
- PET-CT to Check Whether Treatment Is Working
- PET-CT to Look for Cancer Coming Back
- Questions to Ask Before Booking a PET-CT Scan
- What Can a PET-CT Scan Detect — and What It Cannot
- What Is a PET-CT Scan and How Does It Work?
- What Is a Radiotracer and Which One Will I Be Given?
- Who Should Not Have a PET-CT Scan?
- Whole-Body PET-CT vs a Limited or Regional Scan
- Why Has My Doctor Ordered a PET-CT Scan?
Booking, Access & District Logistics
- Booking Without a Doctor's Referral
- Booking a PET-CT for Someone Living Abroad
- Can You Get a PET-CT Scan Closer to Home?
- Getting an Urgent PET-CT Scan
- How Early Should You Arrive for Your Scan?
- How to Book a PET-CT Scan in Hyderabad
- PET-CT for Patients From Nalgonda and Suryapet
- PET-CT for Patients From North Andhra
- PET-CT for Patients Travelling From Karimnagar
- PET-CT for Patients Travelling From Khammam
- PET-CT for Patients Travelling From Nizamabad
- PET-CT for Patients Travelling From Warangal
- Rescheduling or Cancelling a PET-CT Scan
- What Happens If You Miss Your PET-CT Slot?
- Where to Stay Near a PET-CT Centre in Hyderabad
- Why PET-CT Slots Are Fixed and Cannot Be Moved
Choosing a PET-CT Centre & Quality
- AERB Approval and Radiation Safety Licensing
- Comparing Two Quotes: What Is Actually Different?
- Digital PET and Time-of-Flight: What They Actually Change
- Do You Need to Go to the Same Centre for Follow-Up Scans?
- Does an Oncologist-Reviewed Report Actually Help?
- Does the PET-CT Scanner Model Matter?
- Getting a PET-CT at a Government Hospital in Telangana
- How to Choose a PET-CT Centre in Hyderabad
- Questions to Ask a PET-CT Centre Before Booking
- Red Flags When Choosing a Scan Centre
- Same-Day and Walk-In PET-CT Appointments
- Standalone Diagnostic Lab vs a Cancer Centre
- The Four PET-CT Centres in Hyderabad: Which Is Nearest?
- What Makes a PET-CT Report Good?
- What to Do If You Are Unhappy With Your Scan or Report
- Who Reads Your Scan Matters More Than the Machine
PET-CT Cost, Insurance & Schemes
- Ayushman Bharat, CGHS and EHS Coverage for PET-CT
- Cashless vs Reimbursement for a PET-CT Scan
- Comparing PET-CT Quotes: A Checklist Before You Pay
- Does a Cheaper PET-CT Mean a Worse Scan?
- EMI and Payment Options for a PET-CT Scan
- Free and Subsidised PET-CT: Government Options and Waiting Times
- Hidden Charges in PET-CT Scans: What to Check Before You Book
- Is PET-CT Covered Under Aarogyasri?
- Is PET-CT Worth the Cost Compared With a CT Scan?
- Is a PET-CT Scan Covered by Health Insurance in India?
- PET-CT Cost for Non-Cancer Conditions
- PET-CT Cost vs CT, MRI and Bone Scan in Hyderabad
- PET-CT Scan Cost in Hyderabad: The Full Price List
- PSMA, DOTATATE and FAPI PET-CT Costs in Hyderabad
- Paying for a PET-CT Scan From Abroad
- Planning the Cost of Your Cancer Diagnostics
- Repeat PET-CT Scans: What Each Follow-Up Costs
- Value for Money vs Deep Detect: Which PET-CT Should You Choose?
- What Does the Free Consultation With Your Scan Include?
- What Is Included in a PET-CT Scan Price — and What Is Not
- Why Do PET-CT Prices Vary So Much Between Centres?
- Why PET-CT Insurance Claims Get Rejected
Reports, Records & Second Opinions
- Comparing a New Scan With Your Previous One
- Do You Need a Repeat Scan or Just a Re-Read?
- Errors and Corrections in Scan Reports
- Getting a Second Opinion on Your PET-CT Report
- How to Get a Digital Copy of Your PET-CT Images
- Keeping Your Scan Records for the Long Term
- Sharing Your Scan With a Doctor Abroad
- Taking Your PET-CT Report to Another Hospital
- Understanding the Nuclear Medicine Specialist's Role
- What You Receive: Report, Images, CD and DICOM
- What to Do If the Report Says Something You Do Not Understand
- When Is a Second Opinion on a Scan Worth It?
- When Will You Get Your PET-CT Report?
- Why Two Reports on the Same Scan Can Differ
Your next step
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Common questions
Frequently asked questions
What does the SUV number on my PET-CT report mean?
SUV stands for Standardised Uptake Value. It measures how much of the injected FDG a specific area absorbed relative to the rest of the body. A higher number means more uptake. There is no universal number that separates benign from malignant — interpretation depends on the location, the cancer type, and comparison with previous scans. Your oncologist reads it in that full context, never as an isolated figure.
My report says 'increased FDG avidity compared to previous scan' — is that bad news?
Increased avidity means the area is absorbing more glucose than it was at your last scan. Whether that is concerning depends on where it is, what treatment you have been on, and what your oncologist expected to see. An increase in a treated area can sometimes reflect inflammation from treatment rather than cancer growth. Bring the report to your appointment — this is exactly the kind of finding that needs your full clinical picture to interpret.
Does 'no FDG-avid lesion detected' mean I am cancer-free?
It means no area of abnormal uptake was seen, which is the outcome your team is hoping for. However, PET-CT cannot detect every cancer cell — very small deposits or tumours with low metabolic activity may not appear. Your oncologist will explain what this result means for your situation and what follow-up is planned. Do not interpret it as a guarantee that no disease remains.
What is the difference between a PET-CT and a regular CT scan?
A regular CT scan shows anatomy — the shape and size of structures in your body. A PET-CT adds a metabolic layer by showing where the body is using glucose at a higher rate than normal, which can reveal cancer in tissue that looks completely normal in size on CT alone. The two are fused so findings from both are read together. Your oncologist chooses the scan that answers the clinical question being asked.
Why does almost every PET-CT report end with 'suggest clinical correlation'?
Radiology reports describe what is visible on the image. The radiologist cannot see your full history, your symptoms, or your previous results in the way your oncologist can. 'Clinical correlation' is standard phrasing asking your treating team to link the imaging finding to everything else they know about you. It appears on almost every radiology report and is not a sign of uncertainty about the scan itself.
Where can I have my PET-CT scan done if I am being treated at CION?
CION coordinates PET-CT scans through four partner imaging centres in Hyderabad. When your oncologist orders a scan, the team arranges it at one of those centres and ensures the report is received directly. Interpretation of your results is always done by your treating oncologist, not the imaging centre alone. Ask your team which centre is most convenient for you and how long the report will take.