Question

Which of the following represent features of PET scans? Check all of the boxes that apply.

can show body structures in three dimensions

used to treat certain cancers

can help discover the function of tissues

harmless positron radiation is used

a tracer is injected into the body

used in mammography to screen for cancer

Answer 1

Select the true features of PET scans:

- can show body structures in three dimensions — Yes. PET produces tomographic (3‑D) images.
- used to treat certain cancers — No. PET is a diagnostic imaging technique, not a therapy.
- can help discover the function of tissues — Yes. PET is functional imaging (e.g., metabolic activity).
- harmless positron radiation is used — No. PET uses ionizing (positron‑emitting) radionuclides; the radiation is not harmless.
- a tracer is injected into the body — Yes. A radiotracer (e.g., FDG) is usually injected.
- used in mammography to screen for cancer — No. Mammography uses x‑ray screening; PET is not a routine breast‑cancer screening tool.