Scanxiety & scan prep
The Night Before — Your PET-CT Scan
Not being able to sleep the night before a PET-CT is one of the most commonly reported experiences in cancer care. The scan is not what frightens most people. It is the results — and there is nothing to resolve about that tonight. Here is what helps.
Medically reviewed by Dr. Bharati Devi Gorantla, Medical Oncologist, MBBS · MD · DM (Adyar, Chennai) · ECMO · MRCP SCE (UK) · Last reviewed September 2026
- This is the hardest night — The wait before a scan result is one of the most anxious moments in a cancer journey. That is the experience of most people who go through it.
- The scan itself is not painful — A PET-CT involves an injection, a period of rest, and lying still. It does not hurt, and it is over in less than a morning.
- You cannot change tomorrow by worrying tonight — The scan will show what it shows. Your job tonight is simply to arrive.
- Preparation is something you can do right now — Getting your bag ready, writing your questions, and knowing what to expect puts something in your hands when everything else feels out of your control.
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Not being able to sleep the night before a PET-CT is normal. Your mind is not broken — it is responding to real stakes. The anxiety is almost always about the results, not the scan itself. That distinction matters, because the scan tomorrow is manageable. The results are a conversation for another day.
Why is the night before a PET-CT so hard to get through?
The PET-CT itself is not what most people are afraid of. What they are afraid of is what the images might show.
That fear is rational. A scan result can change the treatment plan, the prognosis, what comes next. Your mind knows this. At night, with nothing else to focus on, it will not let it go.
You are not experiencing something unusual. Cancer psychologists describe the period around scans as one of the most distressing in the whole journey — often harder than treatment itself. Knowing that does not make tonight easier, but it makes it less lonely.
What actually helps when you cannot sleep?
Stop trying to force sleep. If you have been awake for more than half an hour, getting up briefly — a warm drink, something gentle to read in dim light — often works better than staying in bed.
Slow your breathing deliberately. Breathe in slowly, then breathe out for longer than you breathed in. This slows your heart rate, which settles the physical part of the feeling. A few minutes of it can help.
Write the fears down. Not to solve them — just to move them out of your head. Worries that are circling at 3am often feel slightly more contained once they are on paper.
If the fear tonight feels overwhelming, psycho-oncology support is available through your oncology team. iCall, run by TISS, is a free counselling service available across India — search 'iCall TISS' to find them.
What should you do tonight to prepare?
Check your prep instructions
Your team will have given you guidance on eating and drinking before the scan. Read it again now. If you cannot find it, call the centre first thing in the morning rather than guessing.
Lay out what you need
Photo ID, your appointment confirmation, a list of your current medications, and comfortable clothing with no metal zips. Doing this now means one less thing to manage tomorrow morning.
Write down your questions
Not tonight's fears — the questions you have been meaning to ask at your next appointment. Writing them gives tomorrow a purpose beyond just getting through the scan.
Tell someone your plan
Even if no one is coming with you, let someone know where you are going and when to expect you home. A scan day is easier when it is not entirely solitary.
Let tonight go
The scan team has done this many, many times. Your job tomorrow is simply to arrive.
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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Medical Oncologist
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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)
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Dr. Owais Mohammed
MBBS, MD (General Medicine), DrNB (Medical Oncology), ECMO, MRCP SCE (Medical Oncology) (UK)
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Dr. Muralidhar Muddusetty
MBBS (AIIMS), MS (Surgery) (AIIMS), DNB (Surgical Oncology), MRCS (Edinburgh)
Surgical Oncologist
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Dr. Vinay Mamidala
MBBS, MS(General Surgery), M.Ch(Surgical Oncology), FMAS, FARIS(Ongoing)
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Support for the person doing the caring
Practical guidance from a team that sees families through this every day.
What will the PET-CT actually feel like?
A PET-CT starts with an injection of a small amount of radioactive tracer. The needle is the same as any other injection. The tracer leaves your body naturally over the following day or two.
After the injection you will rest quietly while the tracer moves through your body. The team will tell you how long this will take when you arrive.
The scan itself means lying still on a table that moves slowly through a large ring. It is quieter than an MRI and does not feel as enclosed. Most people find it less uncomfortable than they had imagined.
What do you need to bring tomorrow?
- Photo ID and your appointment confirmation
- A written list of your current medications, including any supplements or herbal remedies
- Comfortable, loose clothing — no metal zips, no underwire bra
- A small snack and drink for after the scan if you have been fasting
- Questions for your next appointment, written down
- Something to pass the waiting time — a book, headphones, a downloaded podcast
- A support person coming with you, or someone who knows when to expect you home
Did you know?
Cancer psychology research, cited in survivorship guidelines from ASCO and ESMO, consistently identifies the period around scans as more distressing for many patients than active treatment.
Naming this experience — scanxiety — has made it a recognised part of the cancer journey rather than a personal failing or a sign of poor coping.
Source: ASCO and ESMO Survivorship and Psycho-Oncology Guidelines
PET-CT at CION starts from Rs 10,499 — among the lowest published prices in Hyderabad — across 4 partner centres in Banjara Hills, Punjagutta, Himayatnagar and Narayanaguda. Indicative price, as of September 2026.
Explore 62 more Family Support, Myths, Follow-Up and Emergencies topics
Scanxiety & Emotional Impact
- Fear of What the Scan Will Find
- Getting Bad News From a Scan Report
- Getting Good News: Why Relief Is Complicated
- Living Between Scans: The Six-Month Rhythm
- Making the Most of Your Post-Scan Consultation
- Recurring Scanxiety in Long-Term Surveillance
- Scanxiety: The Fear Before and After a PET-CT
- Should You Look Up Your Results Online Before the Consult?
- Supporting Someone Through Scan Day
- Telling Family About Scan Results
- The Night Before a PET-CT Scan
- Waiting for PET-CT Results: How to Get Through It
- When a Patient Refuses to Have the Scan
- When to Seek Counselling Around Scans
Caretaker & Family Guide
- A Printable PET-CT Day Checklist for Families
- After the Scan: What the Family Should Know
- Collecting and Storing the Report and Images
- Coordinating a Scan for a Parent in Another City
- Explaining a Parent's Scan to Children
- Explaining the Scan to an Anxious Patient
- Getting an Elderly Parent to and From the Scan
- Helping Someone Fast Before a PET-CT
- Managing Cost and Payment as a Family
- Preparing Questions for the Post-Scan Consultation
- The Family's Complete Guide to a PET-CT Scan Day
- What the Attendant Can and Cannot Do During the Scan
Emergencies & Red Flags
- Accidental Radiation Exposure: Pregnancy Discovered After a Scan
- Breathing Difficulty During or After a Scan
- Delayed Contrast Reaction Hours After the Scan
- Emergencies Around a PET-CT Scan: What Needs Immediate Care
- Fainting or Collapse at the Scan Centre
- Low Blood Sugar (Hypoglycaemia) During Fasting
- Panic Attack During the Scan
- Severe Contrast Reaction: Recognising It
- What to Do If the Cannula Site Swells or Hurts After
- When to Call the Centre After Your Scan
Follow-Up & Surveillance Scanning
- Can You Refuse a Follow-Up PET Scan?
- Follow-Up Scanning During Long-Term Treatment
- How Often Will You Need a PET-CT After Treatment?
- Is Routine Surveillance PET Actually Recommended?
- Keeping a Personal Scan Log
- Reducing Radiation Across Years of Surveillance
- Scan-Based vs Symptom-Based Follow-Up
- Surveillance Scanning by Cancer Type: A Reference Table
- The Annual Cost of Cancer Surveillance Scanning
- Transferring Surveillance to a Centre Closer to Home
- What Happens If a Surveillance Scan Shows Something?
- When Can You Stop Having Scans?
Myths & Misinformation
- Ayurvedic and Alternative Alternatives to a PET Scan
- Myth: A Normal PET Scan Means You Are Cured
- Myth: A PET Scan Can Cause Cancer
- Myth: A PET Scan Detects Every Cancer
- Myth: A PET Scan Spreads or Worsens Cancer
- Myth: A Positive PET Scan Means You Definitely Have Cancer
- Myth: A Scan From a Cheaper Centre Will Not Be Accepted
- Myth: An Expensive Scan Is Always a Better Scan
- Myth: Eating Sugar Before a Scan Will Show Up Cancer
- Myth: PET Scans Are Only for Terminal Cancer
- Myth: The Tracer Injection Is a Kind of Chemotherapy
- Myth: You Should Avoid Water After a PET Scan
- Myth: You Should Get a PET Scan Every Year to Be Safe
- Myth: You Stay Radioactive for Days After a PET Scan
Your next step
Talk to an oncologist about your scan
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Common questions
Frequently asked questions
Will not sleeping affect the PET-CT results?
Poor sleep the night before does not affect what the scan images show. The tracer moves through your body based on how your cells are metabolising it — rest does not change that. Being tired may make lying still feel harder, but it will not alter the clinical result. Let the team know when you arrive if you are exhausted.
Is it normal to feel more anxious now than I did during chemotherapy?
Many people describe exactly this. During treatment there is something to do — you go in, you have the infusion, you manage what follows. A scan is pure waiting, and waiting concentrates the fear in a way that active treatment often does not. This is a recognised experience, not a sign of poor coping. If the anxiety is affecting you significantly, mention it to your oncology team — psycho-oncology support is available.
What if I feel panicky during the scan?
Tell the scan team before you start, not after. If you tend to feel panicky in confined spaces or high-stakes situations, say so when you arrive. They can walk you through each moment, check in during the scan, and pause if you need them to. You will not be the first person to ask for extra reassurance.
I keep imagining the worst-case result. How do I stop those thoughts?
You probably cannot stop them, and trying to push them away usually makes them return more forcefully. What tends to work better is noticing the thought without following it all the way into an imagined scenario. Write it down, step away, do something else for a few minutes. If this has been going on for weeks and is affecting your daily life, raise it with your team — psycho-oncology support is available.
Can my family member come with me?
Usually someone can come to the centre and wait while the scan happens, though they will not be in the scan room itself. Check with the imaging centre in advance — policies on accompanying visitors vary. Having someone there for the travel and the wait often makes a real difference to how the day feels.