At a glance
A PSMA PET scan is a nuclear medicine imaging test that finds prostate cancer cells anywhere in the body by detecting a protein called PSMA (prostate-specific membrane antigen) that sits on the surface of those cells.
Before the scan, you receive an injection of a small amount of radioactive tracer. This tracer is designed to bind tightly to PSMA. A PET (positron emission tomography) camera then maps exactly where the tracer has collected, lighting up prostate cancer deposits that ordinary CT or bone scans often miss, including tiny lymph node spread and bone involvement.
Medical Condition
PSMA PET scanning is ordered specifically for men with prostate cancer when the care team needs a more detailed picture than conventional imaging can provide.
- Rising PSA (prostate-specific antigen, a blood marker for prostate cancer) after surgery or radiotherapy, where doctors need to find the source of the recurrence.
- Staging of newly diagnosed high-risk or intermediate-risk prostate cancer before treatment begins.
- Checking whether cancer has spread to lymph nodes, bones, or other organs before a major operation.
- Planning radiation therapy by pinpointing exactly which spots need to be targeted.
- Monitoring response to treatment in men receiving hormone therapy or other systemic treatments.
- Selecting patients who may benefit from PSMA-targeted therapy (a treatment that uses a radioactive molecule to attack cancer cells directly).
The scan is not suitable for everyone. Your doctor will weigh its usefulness against your specific situation.
- Men whose prostate cancer is very low risk and confined to the gland, where the result is unlikely to change the treatment plan.
- Patients with very poor kidney function, as the tracer is cleared through the kidneys and image quality may be reduced.
- Pregnant or breastfeeding women, since radiation exposure carries risk to a developing baby or infant.
- Patients who have recently received certain nuclear medicine treatments, because residual radioactivity can interfere with the images.
Risks & Complications
PSMA PET scanning is a diagnostic procedure that carries very few risks, and serious complications are rare.
- Radiation exposure: the tracer delivers a small dose of radiation, similar to what you would receive from a CT scan. The radioactivity leaves the body within hours to days.
- Injection site discomfort: mild pain, bruising, or brief swelling where the tracer is injected.
- Allergic reaction to the tracer: uncommon, and usually limited to mild skin flushing or itching. Severe reactions are very rare.
- False-positive result: the scan may flag tissue that is not actually cancer, which can lead to further tests.
- False-negative result: very small deposits of cancer cells may not show up, especially when PSA levels are very low.
- Claustrophobia (discomfort in enclosed spaces) or difficulty lying still during the scan, which can affect image quality.
Preparation & Procedure
Most hospitals ask you to stop eating for at least four to six hours before the tracer injection, though drinking plain water is usually allowed. Your care team will give you specific instructions and you follow those over any general guidance.
Some medications, particularly hormone therapies for prostate cancer, may need to be paused for a defined period before the scan, because they can lower PSMA expression on cancer cells and reduce scan accuracy. Your nuclear medicine doctor will review your medication list and advise you directly. Avoiding strenuous exercise for at least twenty-four hours beforehand also helps reduce background activity in the images.
Before the scan day, your care team usually reviews recent blood tests including your PSA level, a basic kidney function test, and any prior imaging. These help the nuclear medicine team choose the right tracer dose and interpret the results accurately.
On the day of the scan, the procedure generally follows these steps.
- You arrive and a nurse or technician confirms your identity and reviews your medical history and current medications.
- A small cannula (a thin plastic tube) is placed in a vein in your arm, and the PSMA tracer is injected through it.
- You wait in a quiet room for the tracer to travel through your body and bind to PSMA on cancer cells. This uptake period is usually around sixty to ninety minutes, but timing varies between hospitals.
- You are asked to empty your bladder before entering the scanner, because the tracer is cleared through the urine and a full bladder can obscure nearby structures.
- You lie on a flat table that moves slowly through the PET scanner. Many centres combine the PET with a CT scan (called a PSMA PET/CT) in the same session to provide both metabolic and anatomical detail.
- The scanning itself typically takes between twenty and forty minutes. You need to lie still, but you remain awake throughout.
- The cannula is removed, and you are observed briefly before being discharged. No anaesthesia is required.
Aftercare
Recovery after a PSMA PET scan is straightforward because the procedure does not involve surgery or sedation. Most people leave the facility within a short time after the scan ends and can return to their normal routine the same day.
- Drink plenty of water after the scan to help flush the radioactive tracer through your kidneys and out of your body more quickly.
- Avoid prolonged close contact with pregnant women, young children, and infants for the rest of the scan day, as a precaution against the small residual radiation. Your team will give you a specific timeframe based on the tracer used.
- You may eat and take your regular medications as soon as the scan is over, unless your doctor has told you otherwise.
- If the scan was combined with a CT using contrast dye, your team will advise you on any additional hydration or medication adjustments needed.
- Results are usually interpreted by a nuclear medicine specialist and a radiologist working together. A written report is typically ready within a few days and is then reviewed with you by your urologist or oncologist.
- The results of the scan feed directly into your treatment planning, so ask your doctor what the next appointment or decision point will be before you leave.
Cost & What Determines It
PSMA PET scanning is one of the more expensive imaging tests available because it requires a short-lived radioactive tracer that must be produced fresh, often on the day of the scan, as well as specialised equipment and nuclear medicine expertise that not every hospital possesses.
- Tracer production and logistics: the radioactive tracer has a very short shelf life and may need to be shipped from a regional production facility on the day of your scan, adding cost that varies by location.
- Type of scan: a PSMA PET/CT (combined with a CT scan) costs more than a PET alone, but is more commonly requested because of the added anatomical detail.
- Hospital class and country: academic medical centres and private hospitals in high-income countries charge significantly more than equivalent facilities in medical travel destinations.
- Disease complexity: patients with widespread or previously treated cancer may need a longer scan session or additional imaging sequences.
- Radiologist and nuclear medicine specialist fees: these are sometimes included in a package and sometimes billed separately.
- Anaesthesia or sedation: not usually needed for this scan, but if it is used, it adds to the total.
- Additional tests in the same visit: blood tests, kidney function checks, or follow-up consultations arranged on the same day.
Hospital packages for PSMA PET scanning typically include the tracer, the scan itself, and a written radiological report. Fees for the nuclear medicine specialist's consultation, the referring urologist or oncologist's follow-up appointment, and any additional blood tests are often billed separately. Confirm the exact scope of any package in writing before you travel.
BPJS Kesehatan does not cover medical procedures performed outside Indonesia, and most Indonesian private insurance policies exclude overseas treatment as well. Patients who travel abroad for a PSMA PET scan generally pay out of pocket, or through a private international health insurance policy that explicitly covers overseas diagnostics. Before booking, ask the hospital for a detailed written cost estimate that lists each item separately. This protects you from unexpected additional charges after the scan is done.
Frequently Asked Questions
Does a PSMA PET scan hurt?
A PSMA PET scan is not painful. A small injection is given through a vein to deliver the radiotracer (a mildly radioactive substance that attaches to prostate cancer cells), and most people find this no more uncomfortable than a routine blood test. The scan itself requires you to lie still inside the scanner, which causes no physical discomfort.
How do I prepare for a PSMA PET scan, and do I need to fast?
Your hospital team will give you specific preparation instructions, but fasting for several hours before the scan is commonly required. You may also be asked to avoid strenuous exercise in the day or two beforehand, because physical activity can affect how the radiotracer is distributed in the body. Drink plenty of water unless your care team advises otherwise, as staying hydrated helps flush the tracer from your system after the scan.
How long does a PSMA PET scan take, and when will I get the results?
The full appointment usually takes between two and three hours, because there is a waiting period after the injection to allow the radiotracer to travel through your body before the actual imaging begins. The imaging itself typically takes around 20 to 45 minutes. Results are usually interpreted by a nuclear medicine specialist and returned to your referring doctor within a few days, though this can vary by hospital.
How much does a PSMA PET scan cost?
The cost of a PSMA PET scan depends on several factors, including the hospital class, whether additional CT imaging is performed alongside it, and the specific radiotracer used, as PSMA tracers require specialist production and handling. The complexity of reporting by a nuclear medicine specialist also influences the overall price. Requesting a written estimate directly from the hospital is the most reliable way to get an accurate figure for your situation.
This page is general information, not a substitute for medical advice. Every case is different. Your doctor decides what is right for you.
