PET-CT for neuroendocrine tumours
DOTANOC vs DOTATATE — Is There a Difference?
You may have been told you need a DOTANOC scan or a DOTATATE scan and assumed one must be better. They are not two different tests. They are two names for the same type of scan, using slightly different tracers that work in the same way.
Medically reviewed by Dr. C. Raghavendra Reddy, Medical Oncologist, MBBS (Gold Medal) · DNB · DM (Medical Oncology, Gold Medal) · Last reviewed September 2026
- Same scan, two tracer names — Both DOTANOC and DOTATATE are somatostatin receptor PET-CT scans. They use different tracers but look for the same tumour cells.
- Neither is categorically better — NCCN and ESMO guidelines treat both as acceptable options for neuroendocrine tumour staging. Neither is routinely preferred over the other.
- Availability drives the choice — In practice, you receive whichever tracer your imaging centre has confirmed as available. It is a supply question, not a clinical judgement about one being superior.
- Tracer confirmed before you book — Tracer supply is checked and confirmed before your appointment is finalised, so you will not arrive to find the scan cannot proceed.
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DOTANOC and DOTATATE are two radioactive tracers that do the same job: they bind to somatostatin receptors on neuroendocrine tumour cells. Neither is categorically better than the other. Which one you receive depends on what your imaging centre has available at the time of your scan — both aim to find the same thing.
A whole-body PET-CT at CION costs from Rs 10,499 — among the lowest published prices in Hyderabad. Indicative price, as of September 2026.
Are DOTANOC and DOTATATE the same scan?
Both are names for a PET-CT scan that uses a radioactive tracer to find neuroendocrine tumours. The tracer binds to somatostatin receptors — proteins found on the surface of most neuroendocrine tumour cells — and the scanner detects where it has collected in the body.
The difference between the two tracers is which receptor subtypes each one binds to. DOTATATE has the highest affinity for the SSTR2 receptor subtype, which is the most commonly expressed subtype in neuroendocrine tumours. DOTANOC binds to SSTR2, SSTR3 and SSTR5.
For most patients, NCCN and ESMO guidelines treat both tracers as clinically equivalent options for staging and follow-up imaging of neuroendocrine tumours. The question of which is superior is not one the evidence resolves cleanly — and it is rarely the question your clinical team is asking.
Which tracer will you actually be given?
In practice, you will receive whichever tracer your imaging centre has confirmed as available at the time of your appointment. Tracer supply is confirmed before your booking is finalised.
Your oncologist may specify a tracer if your clinical situation calls for it — for example, if you are having a follow-up scan and your team wants to compare it directly with a previous image. Using the same tracer each time makes that comparison more straightforward.
If you have had a previous DOTANOC or DOTATATE scan, tell your team. They will note which tracer was used and may request the same one for consistency. Otherwise, either tracer meets the same clinical purpose for a first scan.
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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Dr. Bharati Devi Gorantla
MBBS, MD(General Medicine), DM(Medical Oncology)(Adyar,Chennai), ECMO, MRCP SCE(UK)
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MBBS, MD (General Medicine), DrNB (Medical Oncology), ECMO, MRCP SCE (Medical Oncology) (UK)
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What do these words mean?
- DOTANOC
- A radioactive tracer that attaches to somatostatin receptors on neuroendocrine tumour cells. Used in a PET-CT scan to locate tumour sites throughout the body.
- DOTATATE
- Another somatostatin receptor tracer with the same imaging purpose as DOTANOC. It binds with particularly high affinity to the SSTR2 receptor subtype, the most commonly expressed receptor in neuroendocrine tumours.
- Somatostatin receptor
- A protein on the surface of neuroendocrine tumour cells that the tracer attaches to. The scan works because most neuroendocrine tumours carry large numbers of these receptors — far more than surrounding healthy tissue.
- PET-CT
- A scan combining positron emission tomography with computed tomography. The PET component shows where the tracer has collected; the CT component shows the anatomy around it.
What to sort out before your scan
- Tell the booking team if you have had a previous DOTANOC or DOTATATE scan, and when — your team may request the same tracer for comparison
- Ask whether you need to fast before the scan, as requirements vary by centre
- Arrange for someone to travel with you — the full appointment takes several hours
- Bring a list of all your medicines, including supplements and Ayurvedic preparations
- Tell your team if you are taking a somatostatin analogue such as octreotide or lanreotide — timing around these medicines affects image quality
- Confirm tracer availability and the current scan cost with the centre before your appointment
What happens on the day of your scan
Tracer injection
A small amount of the radioactive tracer is injected into a vein. You then wait — usually 45 to 60 minutes — while it travels through your body and binds to receptor sites.
PET-CT imaging
You lie still on a scanner bed while the machine takes images. This part takes around 20 to 30 minutes. The scanner is open at both ends and is not a tight enclosed space.
Leaving the centre
You can eat and drink normally after the scan. You will be mildly radioactive for a few hours, so your team will ask you to avoid close contact with young children and pregnant women for the rest of the day.
Receiving your report
A nuclear medicine specialist prepares a written report, usually within one to two working days. Your oncologist will then interpret the results in the context of your full clinical picture.
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.
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Common questions
Frequently asked questions
Is one tracer better at finding tumours than the other?
For most neuroendocrine tumour types, NCCN and ESMO guidelines treat DOTANOC and DOTATATE as equivalent imaging options. DOTATATE has slightly higher affinity for the SSTR2 receptor subtype, which is the most common subtype in neuroendocrine tumours, and some studies have reported marginally higher detection in specific tumour types. Whether that difference is meaningful for your particular case is a question for your nuclear medicine specialist. The evidence does not support one tracer being categorically superior across all neuroendocrine tumours.
Can I ask for a specific tracer?
You can tell your team which tracer you have had previously, particularly if you want your current scan to be directly compared with an earlier one. For follow-up imaging, using the same tracer each time makes comparison more straightforward, and your team may request it on that basis. Beyond that, the choice usually rests on what is available at the imaging centre on the day of your scan. If your oncologist has a specific clinical reason to prefer one tracer, they will specify it at the time of referral.
How much does this scan cost?
Both DOTANOC and DOTATATE PET-CT scans are indicatively priced at ₹23,999 at CION partner imaging centres — though this figure is subject to change, and you should confirm the current cost when booking. Tracer supply is confirmed at the time of booking. If you have health insurance, check whether somatostatin receptor PET-CT is covered under your policy and whether pre-authorisation is required, as this varies between insurers.
Do I need to travel to get this scan?
DOTANOC and DOTATATE PET-CT scans require specialist equipment and a nearby facility to produce the tracer, so they are not available at every imaging centre. CION coordinates this scan through partner imaging centres — ask your team which centre is nearest to you. Appointment availability can also depend on tracer delivery schedules, so book as early as you can once your scan is requested.
How long does the whole appointment take?
Allow roughly three to four hours from arrival to leaving the centre. The tracer is injected first, and you then wait — usually 45 to 60 minutes — for it to distribute through your body. The scan itself takes around 20 to 30 minutes. After that, you are free to leave. The written report from the nuclear medicine specialist is typically ready within one to two working days.
Will my results look different depending on which tracer I had?
The images from both tracers are interpreted using the same criteria by the same type of specialist. If you are having a follow-up scan after a previous one, your nuclear medicine specialist will note which tracer was used each time. A change of tracer between scans can sometimes make direct comparison harder, which is why your team may prefer consistency in follow-up imaging. It does not mean one result is more reliable than the other.