P4e Treatment
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Recall that nuclear radiation is used in medicine.
Recall that x-rays and gamma rays are electromagnetic waves.
Recall that nuclear radiation can damage cells.
Recognise that gamma rays are used to treat cancer.
Recall that nuclear radiation is used to sterilize hospital equipment.
Recall that the person in hospitals who takes x-rays and uses radiation is a radiographer.
Recall that only beta and gamma radiation can pass through skin.
Describe that beta or gamma emitters are used as tracers in the body.
Describe that X-rays and gamma rays:
- have similar wavelengths;
- are produced in different ways.
Explain that:
- gamma rays are given out from the nucleus of certain radioactive materials;
- X-rays are made by firing high speed
- electrons at metal targets;
X-rays are easier to control than gamma rays.
Explain how radioactive sources are used in medicine:
- to treat cancer:
- gamma rays focused on tumour;
- wide beam used;
- rotated round the patient with tumour at centre;
- limiting damage to non-cancerous tissue.
- as a tracer:
- beta or gamma emitter;
- drunk/eaten/ingested/injected into the body;
- allowed to spread through the body;
- followed on the outside by a radiation detector.
Objectives:
stuff what is important goes hereContent 3Content 4Content 5Content 2
Prior Learning:
Difficult Concepts:
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Homework:
Homework1
Objectives:
Content 1
Prior Learning:
Difficult Concepts:
Outline:
Suggested Practicals:
Extension Activities:
Homework:
Homework2 again