Examlex
Which of the following groups of terms are in the order of increasing extension?
fNIRS
Functional Near-Infrared Spectroscopy, a non-invasive imaging method that measures neural activity and blood flow in the brain using near-infrared light.
PET
Positron Emission Tomography, a nuclear medicine functional imaging technique used to observe metabolic processes in the body.
Radioactive Isotopes
Variants of chemical elements that decay over time, releasing radiation, and are used in medical diagnosis, treatment, and research.
Metabolic Activity
The sum of all biochemical processes that occur within an organism, including those that break down nutrients for energy and those that build up new substances.
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