Positron emission tomography and computed tomography (PET-CT)

What is PET-CT?  

Positron Emission Tomography (PET) and Computed Tomography (CT) is a modern medical imaging technique that combines PET and CT scans. The main principle of PET-CT is the simultaneous evaluation of metabolic processes and anatomical structures in the body. PET tracks cellular activity, while CT provides detailed images of organs and tissues. This method is widely used in oncology, cardiology, neurology, and other medical fields where high diagnostic accuracy is essential.

Difference from regular MRI and CT scans  

PET-CT differs from Magnetic Resonance Imaging (MRI) and Computed Tomography (CT) in that it not only visualizes anatomical changes but also assesses the metabolic activity of tissues. MRI and CT provide detailed images of internal organs but do not give information about how cells are functioning. This is especially important in identifying cancer and metastases. PET-CT can detect minimal changes at the cellular level, making it indispensable for detailed assessment of disease spread and treatment planning.

Indications for PET-CT  

PET-CT is used for:

• Diagnosing and staging cancer;
• Detecting cancer recurrences;
• Evaluating the effectiveness of chemotherapy and radiotherapy;
• Searching for metastases;
• Diagnosing cardiovascular diseases;
• Studying neurological disorders, such as Alzheimer's disease.

How to prepare for the procedure?  

Before a PET-CT scan, you should:

• Avoid eating for 4-6 hours before the procedure;
• Refrain from physical activity the day before the exam;
• Inform the doctor about any chronic diseases, allergies, or pregnancy;
• Drink an adequate amount of water, if recommended by your doctor.

How is the PET-CT procedure performed and how long does it take?  

The procedure begins with the administration of a radiopharmaceutical agent, after which the patient must wait for 30-60 minutes to allow the substance to distribute evenly throughout the body. Scanning takes about 20 to 40 minutes, and the total duration of the procedure is approximately 2 hours. The patient must remain still to obtain accurate results.

Interpreting the results  

The results of a PET-CT scan are interpreted by a radiologist. They analyze both the metabolic activity of cells and the anatomical changes to determine the presence of malignant tumors, inflammation, or other abnormalities. This helps assess the stage of the disease and develop a treatment plan.

What does the patient feel during the procedure?  

During the administration of the radiopharmaceutical agent, the patient may feel a cool sensation, but the process is painless. The procedure itself is comfortable, although it is important to remain still during the scan.

Our Equipment  

The "Erebuni" Radiotherapy Center is equipped with advanced technology, including the Siemens Biograph mCT 64, one of the most modern systems for performing PET-CT scans. This machine ensures high sensitivity and image accuracy, guaranteeing fast and high-quality diagnostics. The Biograph mCT 64 reduces the time of the procedure and minimizes radiation exposure, making the process as safe as possible for the patient.

Advantages, Possible Side Effects  

The main advantages of PET-CT are its high accuracy, ability for early diagnosis, and minimal radiation exposure. This makes PET-CT indispensable for detecting diseases in the early stages. Interpretation of results requires the expertise of a highly qualified radiologist. Side effects are rare, but allergic reactions or mild discomfort may occur.

Why choose PET-CT at the Erebuni Radiotherapy Center?  

The "Erebuni" Radiotherapy Center offers services of the highest level, ensuring accurate diagnostics and maximum comfort for each patient. Our state-of-the-art equipment, including the Siemens Biograph mCT 64, and experienced specialists guarantee highly accurate results with minimal risk. We provide safe and effective diagnostic methods tailored to the individual needs of our patients.