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Why is gamma radiation especially useful for imaging conditions inside the body?
AIt cannot pass through skin at all, so it stays at the surface
BIt reacts chemically with bone to dissolve it
CIt has no interaction with detectors outside the body
DIt penetrates tissue, probing internal conditions
Answer & Solution
Correct answer: D. It penetrates tissue, probing internal conditions
1. Imaging techniques need radiation that can travel from inside the body to an external detector.
2. Gamma radiation easily penetrates tissue, making it a useful probe for internal conditions.
3. This is the opposite of being stopped at the surface, and gamma rays do not chemically dissolve bone.
4. External detectors are specifically built to interact with and register this radiation.
5. So easily penetrating tissue is correct.
_Source: OpenStax Physics (CC BY 4.0), Ch 22 "The Atom", section 22.5 Medical Applications of Radioactivity: Diagnostic Imaging and Radiation_
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