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Radioactive sources are used in hospitals for both diagnosis and treatment of medical conditions - Edexcel - GCSE Physics - Question 2 - 2017 - Paper 1
Question 2
Radioactive sources are used in hospitals for both diagnosis and treatment of medical conditions. (a) Complete the sentence by putting a cross (X) in the box next t... show full transcript
Worked Solution & Example Answer:Radioactive sources are used in hospitals for both diagnosis and treatment of medical conditions - Edexcel - GCSE Physics - Question 2 - 2017 - Paper 1
Step 1
Step 2
Describe ways that medical staff can be protected from exposure to ionising radiation.
Answer
Medical staff can be protected from exposure to ionising radiation by:
- Wearing lead aprons: These aprons absorb radiation and protect vital organs.
- Using shielding: Barriers made from lead or concrete help to block radiation from reaching the staff.
- Maintaining distance: Staying as far away from the source of radiation as possible reduces exposure.
- Limiting time near radiation sources: Reducing the duration of exposure minimizes the risk.
Step 3
Explain how cancer tumours can be treated using a radiation source placed inside the patient.
Answer
Cancer tumours can be treated using a radioactive source next to the tumour. The treatment involves:
- Inserting a radioactive source: This source is placed directly next to or inside the cancerous tumour.
- Utilizing alpha and/or beta radiation: These particles are emitted from the source and target cancer cells.
- Effect of ionising radiation: The emitted radiation damages the DNA of cancerous cells, leading to their destruction or mutation, which can inhibit growth.