One Type of Medical Imaging Process Is Called Positron Emission

question 13

Multiple Choice

One type of medical imaging process is called positron emission tomography.Radioactive material is injected into a patient; during the radioactive decay the material emits a positron, which then interacts with an atomic electron, emitting gamma rays, which are detected by the imager.This gamma ray emission process is called:

• A)pair production
• B)annihilation
• C)absorption
• D)alpha decay
• E)fission

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Definitions:

Barbiturates

A class of drugs that act as central nervous system depressants, historically used for anxiety, insomnia, and seizure disorders, but now less common due to risk of dependency.

Depressants

Substances that reduce neurological activity and produce a calming effect, often used to treat anxiety or sleep disorders.

Anxiety

A state of distress or agitation over an outcome that is not assured.

Conscious

Being aware of and responsive to one's surroundings; awake.