Definition

Noun: A medical imaging technique that uses a computerized radiographic system to create detailed, three-dimensional images of metabolic activity and biochemical processes within tissues and organs, particularly the brain. It involves detecting gamma rays emitted by a radioactive tracer (a positron-emitting radionuclide) introduced into the body.

Usage

This term is used in medical, clinical, and research contexts to refer to a specific diagnostic and research imaging procedure. - It is often abbreviated as PET. - It is commonly used in phrases like "PET scan" or "PET imaging."

Examples

• The neurologist ordered positron emission tomography to assess brain function in the patient with suspected dementia.
• Positron emission tomography is invaluable in oncology for detecting cancerous tumors based on their high metabolic rate.
• Researchers used positron emission tomography to study glucose metabolism in the living brain.

Advanced Usage

• PET-CT Scan: A hybrid imaging technique that combines positron emission tomography (PET) with computed tomography (CT) to provide both functional (metabolic) and anatomical (structural) information in a single image set.
• PET-MRI: A hybrid imaging technique that combines positron emission tomography (PET) with magnetic resonance imaging (MRI).

Variants and Related Words

• PET (n.): The standard acronym for positron emission tomography.
• PET scan (n.): The common term for the procedure or the resulting image.
• Tomography (n.): A general term for imaging by sections or sectioning.
• Emission Tomography (n.): A broader category of imaging techniques that create images from emitted signals (like gamma rays) from within the body.

Synonyms

• PET scanning
• PET imaging

Related Phrases

• To undergo a PET scan: To have the procedure performed.
  • The patient will undergo a PET scan next Tuesday.
• PET scan results: The findings or images produced by the procedure.
  • The PET scan results showed abnormal activity in the frontal lobe.

Noun

1. using a computerized radiographic technique to examine the metabolic activity in various tissues (especially in the brain)