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Positron emission tomography/computed tomography (PET/CT)

is a rapidly growing modality that has made a tremendous impact in the care of patients with cancer.

PET scans use a small amount of a radioactive substance, or tracer, to show differences between healthy tissue and diseased tissue.

The most commonly used tracer is ¹⁸F-FDG (Fluoro-deoxy-glucose).

The combination of PET/CT provides complete information about both structure (CT) and function (PET) in the human body.

Application of PET:

Oncological Application (>95%):

Lymphoma, Head and Neck Cancers, Lung cancer, Breast cancers, RCC, Gynaecological malignancies, Metastasis, Carcinoma of Unknown Primary etc.

Useful for:

• Diagnosis of Malignancy
• Staging of various cancers
• Response Evaluation after Chemotherapy, Radiotherapy, Surgery or Immunotherapy
• Restaging
• Surveillance
• PET for guided biopsy etc.

Non Oncological Application (~5%):

• Neurology: Dementia & Epilepsy (Temporal lobe epilepsy)
• Cardiology: Cardiac Viability, Infection of transplanted Valve
• Infection and inflammation: Sarcoidosis, Tuberculosis, Vasculitis, Polymyalgia Rheumatica (PMR), Relapsing Polychondritis, etc.
• Pyrexia of Unknown Origin (PUO)