Hazards & Uses of Radioactive Emissions & of Background Radiation (AQA GCSE Physics): Quizzes
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12 questions from this quiz
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Practise the questions
12 questions from this quiz
What are two main medical uses of nuclear radiation?
What are two main medical uses of nuclear radiation?
Exploring organs & treating cancer
What do medical tracers contain?
What do medical tracers contain?
Radioactive isotopes
Why do medical tracers usually emit gamma rays?
Why do medical tracers usually emit gamma rays?
They can be detected from outside the body
What is the ideal half-life for a medical tracer?
What is the ideal half-life for a medical tracer?
Long for imaging, short to decay after
What is FDG?
What is FDG?
A radioactive form of glucose
What happens in diseased brain tissue when FDG is used?
What happens in diseased brain tissue when FDG is used?
Less glucose used, less radioactivity
What are two methods of internal cancer treatment delivery?
What are two methods of internal cancer treatment delivery?
Injection or ingestion
What types of radiation are used for radioactive implants?
What types of radiation are used for radioactive implants?
Beta or gamma-emitting isotopes
Why does Iodine-131 specifically target thyroid cancer?
Why does Iodine-131 specifically target thyroid cancer?
Absorbed by thyroid gland only
How does external radiotherapy target cancer tumours?
How does external radiotherapy target cancer tumours?
Multiple beams from different positions
Why are gamma rays used for external treatment?
Why are gamma rays used for external treatment?
They penetrate deeper into the body
What is the benefit of moving beam position in external treatment?
What is the benefit of moving beam position in external treatment?
Reduces radiation to healthy tissue