plumiImaging techniques: AQA A‑Level Physics questions
AQA A-Level Physics past-paper questions on 3.10.6.1 Imaging techniques, 2008–2025, with mark schemes and examiner’s reports where available.
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Q02.1
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All 12 questions on Imaging techniques, as a list
- June 2025, Paper 3 Medical physics, Q02.1 (2 marks): Show that about 6 × 1015 nuclei of 99Mo decay between t = 0 and t = 24 hours. decay constant for 99Mo = 2.8 × 10−6 s−1 [2 marks]
- June 2025, Paper 3 Medical physics, Q02.2 (3 marks): 90% of the 99Mo nuclei decay to form 99mTc nuclei. The other 10% decay to form different nuclei. Estimate the number of 99mTc nuclei that are extracted from the
- June 2025, Paper 3 Medical physics, Q02.3 (6 marks): Information about heart function can be obtained from a multi-gated acquisition (MUGA) scan or from a transthoracic echocardiogram (TTE) scan. Heart specialists
- June 2024, Paper 3 Medical physics, Q04.3 (1 mark): Name the particles emitted when a fluorine-18 nucleus decays. [1 mark]
- June 2024, Paper 3 Medical physics, Q04.4 (4 marks): Figure 1 shows the cross-section of a body inside a ring of detectors during a PET scan. The side of each square represents 5 cm. Figure 1 One of the products f
- November 2021, Paper 3 Medical physics, Q01.1 (4 marks): Explain why the value of the half-life of technetium-99m: • makes it suitable for use as a tracer • means that it must be produced in a generator on site. [4 ma
- November 2021, Paper 3 Medical physics, Q01.2 (4 marks): Technetium-99m emits only gamma rays. Explain why this makes technetium-99m suitable for use as a tracer. [4 marks]
- June 2017, Paper 3 Medical physics, Q03.1 (1 mark): State what is meant by a radioisotope. [1 mark]
- June 2017, Paper 3 Medical physics, Q03.4 (2 marks): The decay of the radionuclide results in the emission of a positron. Two of the detectors, directly opposite to each other, are triggered as they each receive a
- June 2017, Paper 3 Medical physics, Q03.5 (2 marks): Figure 1 shows the head of a patient that is 0.2 m across, placed centrally between two of the many detectors in a PET scanner. Figure 1 To determine the positi
- Specimen, Paper 3 Medical physics, Q03 (6 marks): Positron Emission Tomography (PET) and ultrasound scans are both used in medica diagnosis. Compare the quality of the information obtained from these scans in t
- Specimen, Paper 3 Medical physics, Q04.3 (4 marks): Table 1 gives the properties of two radionuclides. Table 1 Technetium 99 m Iodine 131 emitted radiation gamma beta− and gamma half-life / hours 6.0 190 energy o
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