Full formMedical & Health
PETstands forPositron Emission Tomography
Full Form of PET
What is PET?
Positron Emission Tomography (PET) is a nuclear medicine imaging technique that produces three-dimensional, functional images of metabolic processes in the body. It works by detecting pairs of gamma rays emitted indirectly by a positron-emitting radiotracer, which is injected into the patient. In India, PET scans are primarily used in oncology for cancer detection, staging, and monitoring treatment response, as well as in cardiology and neurology for assessing heart conditions and brain disorders. The technology is available at major hospitals and diagnostic centres in metropolitan cities like Delhi, Mumbai, Bengaluru, and Chennai, though access in rural areas remains limited. PET is often combined with CT (PET-CT) to provide both metabolic and anatomical detail, making it a critical tool for precision medicine. For medical students and professionals preparing for NEET PG, AIIMS, or USMLE, understanding PET’s principles (annihilation, coincidence detection) and clinical applications is essential. The Indian government has also promoted PET under schemes like the Ayushman Bharat Digital Mission to improve cancer care accessibility. Despite high costs, increasing awareness and insurance coverage are expanding its use.
PET का फुल फॉर्म
पॉज़िट्रॉन उत्सर्जन टोमोग्राफी
Example
The oncologist recommended a PET-CT scan to assess the extent of metastasis before starting chemotherapy.
PET — frequently asked questions
What is the full form of PET?
The full form of PET is Positron Emission Tomography, a medical imaging technique that uses radioactive tracers to visualize metabolic activity in the body.
Is PET scan safe? How much radiation is involved?
PET scans involve exposure to low levels of radiation, but the risk is generally considered low compared to the diagnostic benefits. The radiotracer decays quickly and is eliminated from the body within a few hours.
What is the difference between PET and CT scan?
A CT scan provides detailed anatomical images using X-rays, while a PET scan shows metabolic activity. Many modern machines combine both (PET-CT) for better diagnosis, especially in oncology.