Paper 1 H - SAMPLE SET 1 Q3
3) Some small fractures do not show up on an X-ray image.
To see the fracture doctors inject the patient with a radioactive isotope.
The image is formed by detecting radiation as it leaves the body.
Figure 5 shows an image of a foot after the patient was injected with the radioactive isotope technetium-99.
To see the fracture doctors inject the patient with a radioactive isotope.
The image is formed by detecting radiation as it leaves the body.
Figure 5 shows an image of a foot after the patient was injected with the radioactive isotope technetium-99.
Technetium-99 emits gamma radiation.
3.1) What is gamma radiation? [1 mark]
3.2) Explain why a gamma emitter is used. [2 marks]
Technetium-99 has a half-life of 6 hours.
3.3) Give the meaning of the term half-life. [1 mark]
3.4) After treatment, hospital equipment may become contaminated.
Describe the level of the hazard associated with contamination with technetium-99.
You should include in your answer a description of how the level of hazard changes over time. [3 marks]
3.5) Some of the hospital equipment may also be irradiated during treatment. Describe how equipment becomes irradiated. [1 mark]
3.6) Why is irradiated equipment not hazardous? [1 mark]
(Total for Question 3 = 9 marks)
3.1) What is gamma radiation? [1 mark]
3.2) Explain why a gamma emitter is used. [2 marks]
Technetium-99 has a half-life of 6 hours.
3.3) Give the meaning of the term half-life. [1 mark]
3.4) After treatment, hospital equipment may become contaminated.
Describe the level of the hazard associated with contamination with technetium-99.
You should include in your answer a description of how the level of hazard changes over time. [3 marks]
3.5) Some of the hospital equipment may also be irradiated during treatment. Describe how equipment becomes irradiated. [1 mark]
3.6) Why is irradiated equipment not hazardous? [1 mark]
(Total for Question 3 = 9 marks)