ENPatients sent for a PET-CT usually ask why, if a CT has been done, and whether the radioactive injection is dangerous: in short, PET-CT shows metabolism rather than shape and is ordered when it matters not only where a lesion is but how active it is. The tracer is weakly radioactive and decays quickly.
Below are the principle in plain words, the situations in which the scan changes a doctor’s decision, the day in the clinic and the invoice: what to expect from PET-CT in Germany. The wider work-up is covered under cancer diagnosis in Germany.
What PET-CT shows and how it differs from CT and MRI
PET-CT shows which areas take up the injected tracer most strongly and exactly where they are, while ordinary CT and MRI mainly show tissue structure. It is two examinations in one machine: CT maps the anatomy precisely, PET shows tracer uptake, and together they tie activity to a specific point in the body.
MRI also shows soft tissue well, but as structure, not metabolism. A plain CT sees a nodule but cannot tell living tumour tissue from scarring after treatment. Hence the rule: PET-CT does not replace the other methods; it answers a question they cannot.
It does not replace a biopsy: only tissue shows what a lesion is. Inflammation takes up the tracer too, so a bright spot is not necessarily a tumour, and the result is read with the history and earlier scans. MRI itself is covered under MRI in Germany.
When the scan is ordered
PET-CT is ordered mainly in cancer, its main field: to stage the disease before treatment, find the primary tumour when metastases appear first, assess the response to chemotherapy or radiotherapy, check a suspected recurrence when tumour markers rise but the CT is clean, and plan radiotherapy fields. The stage then shapes cancer treatment in Germany.
Non-oncological reasons include inflammatory disease and fever of unknown origin, sarcoidosis, vasculitis, infection of prostheses and implants, and selected questions in cardiology and neurology, such as heart-muscle or brain metabolism.
It is not needed for tumours that take up the tracer poorly, which the image may miss, or too soon after surgery or radiotherapy, when healing tissue is inflamed and lights up almost like a tumour. A scan just as a precaution in a self-ordered check-up adds anxiety more often than clarity. Other work of such departments: nuclear medicine in Germany.
Tracers and the variants of the scan
The variants differ mainly in the tracer. Labelled glucose, FDG, is used most often, because active cells consume more sugar. Other tracers are tied to particular tumour types, for example by binding the PSMA protein on prostate cancer cells. The nuclear medicine physician chooses from the referral and diagnosis, not the patient from the internet.
This matters for a trip: the radioactive label decays within hours, at a rate that differs by tracer, and some tracers are made for a named appointment. So the date is fixed in advance and does not move easily. More on tracers and the department: nuclear medicine in Germany.
How the day of the scan runs
The day consists of preparation, the injection, an hour of rest and the scan. No food for several hours beforehand and no strenuous exercise the day before, since working muscles take up sugar and tracer. Patients with diabetes strictly follow a separate regimen agreed with the department. Blood sugar is measured before the injection.
The tracer is injected into a vein, then the patient rests for about an hour in a separate quiet room without talking or a phone. The scan takes about twenty to thirty minutes, the whole visit around three hours.
Afterwards, drink more fluid and keep away from small children and pregnant women for a few hours, as the department explains. The tracer alone gives about the dose of one ordinary CT and the CT part adds to it, so the total is comparable to several ordinary CT scans and is accepted only when the expected benefit justifies it. Pregnancy and breastfeeding are discussed with the doctor before booking. The WHO fact sheet explains ionizing radiation and its work to protect patients.
What it costs and what the invoice covers
The exact price comes from the clinic’s cost estimate and is made up of the tracer, the scanner time, the nuclear medicine physician’s report and, if needed, contrast for the CT part. The referring doctor’s consultation and a second reading by a German specialist are billed separately.
A PET-CT invoice cannot be compared directly with invoices for a separate CT and MRI: they are different examinations. Compare whole programmes instead: days, inclusions and whether the report is in a language the patient reads. See diagnostics prices in Germany and, for a single scan, CT scan cost in Germany.
Frequently asked questions
When is the PET-CT report ready?
Later than the images. A disc with the scans may be handed over the same day, but the nuclear medicine physician writes the report after reviewing every slice against earlier examinations. At some clinics it reaches the referring doctor only after several working days, so ask when booking.
Can I have a PET-CT in Germany without a referral?
Not without a medical reason. Under the German Radiation Protection Act, every examination involving radiation must be justified by a doctor trained in radiation protection, with benefit outweighing risk. For patients from abroad, the records, earlier scans and the treating doctor’s question are the basis on which the nuclear medicine physician decides.
Can I have a PET-CT if I have diabetes?
Yes, with stricter preparation. The timing of the last insulin dose and of tablets is agreed with the department in advance, because insulin shortly before the injection drives the tracer into the muscles. High blood sugar also lowers the scan’s sensitivity, so it is measured first and best brought under control at home.
How AlenMed arranges a PET-CT in Germany
AlenMed handles correspondence, translation and travel. The referral, records and earlier scans are translated and sent to the nuclear medicine departments of partner clinics, and a date comes back, because the scan day is tied to tracer delivery. Then come the visa invitation, the interpreter, accompaniment on the day and the images on a disc with the report.
Plan ahead: the number of days including reporting time, who receives the result at home, and how to ask the German doctor questions after returning.
This material is for information only and is not an offer. The indication for the scan is decided by a doctor in person.