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What is Pet Scan ?

What is a Pet CT Scan?

PET Scan is the most effective and specific method that mixes positron emission tomography (PET) and computed tomography (CT) techniques. PET scans degree mobile uptake of tracers, while CT scans offer a clean photo of the body`s inner structure. Abnormal mobile uptake of this radiotracer is indicative of an ailment or condition. Combining those imaging modalities improves sensitivity, specificity, and typical diagnostic accuracy.

PET Scan now no longer the handiest aid in diagnosis. However has additionally been validated to be the favored purposeful imaging technique for staging, tracking remedy efficacy, and comparing ailment recurrence.

It provides information that is not available with other imaging techniques or requires an invasive procedure such as a biopsy or surgery.

Most PET tests use glucose-like radiopharmaceuticals and have high absorption rates in various tumors. Fluorodeoxyglucose (¹⁸FFDG) is commonly used in cancer patients.

This radiotracer is given by mouth, inhalation, or intravenously, depending on the type of test and the part of the body being tested. Tracers accumulate in places of increased chemical activity. Unique cameras register gamma rays from radioactive tracers, allowing doctors to visualize the work of organs and tissues. Because PETCT scans are associated with radiation risks, your doctor may use lower-dose scans or limit the area that needs to be scanned.

PET-CT scan imaging helps to:

  • Diagnose the disease in its early stages, often before the patient becomes symptomatic, especially when other diagnostic tests are likely to give negative results
  • Determine the extent and severity of the disease
  • Help in cancer diagnosis and determine whether cancer has spread elsewhere in the body
  • Identify areas of the heart muscle and determine the effects of a heart attack or myocardial infarction
  • Individualize therapy based on the unique biological properties of the disease
  • Evaluate the effectiveness of the treatment regimen
  • Modify treatment plans in response to the altered biological behavior of the tissue
  • Assess disease progression, tissue metabolism, and viability
  • Identify recurrence of disease and further disease management

Benefits vs. Risks of PET Scan


  • Multimodality imaging technique provides unique information that is often unattainable using other imaging procedures
  • In radiation therapy, PET-CT can help provide a better target definition and guide radiologists to the biopsy site
  • PET-CT scan has higher sensitivity and specificity for the detection and staging of tumors, as compared to the conventional imaging methods
  • By identifying changes in the body at the cellular level, PET-CT imaging may detect the early onset of disease before it is evident on other imaging tests such as CT or MRI
  • All reports are performed simultaneously, and there are not two times, not two times, but the opportunity for errors will be reduced.


  • Allergic reactions to radiopharmaceuticals Prior information about allergies should be provided to the radiologist.
  • Radiopharmaceutical injections can cause mild discomfort.
  • People who get multiple PETCTs have a higher risk of cancer in the future.

Know About CT Scan 


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